{"id":2538,"date":"2026-09-06T12:33:30","date_gmt":"2026-09-06T05:33:30","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/"},"modified":"2026-09-06T12:33:30","modified_gmt":"2026-09-06T05:33:30","slug":"bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/","title":{"rendered":"B\u1ea3ng x\u1ebfp h\u1ea1ng m\u00e1c Inox theo ch\u1ed1ng \u0103n m\u00f2n: 201\u2013304\u2013316\u20132205"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2538&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;B\u1ea3ng x\u1ebfp h\u1ea1ng m\u00e1c Inox theo ch\u1ed1ng \u0103n m\u00f2n: 201\u2013304\u2013316\u20132205&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u0110\u00e1nh gi\u00e1<\/span>\n    <\/div>\n    <\/div>\n<div class=\"custom-toc\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Noi_dung_chinh\" >N\u1ed9i dung ch\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Nguyen_tac_xep_hang_hop_kim_nao_chong_mon_tot_hon_%E2%80%93_va_vi_sao\" >Nguy\u00ean t\u1eafc x\u1ebfp h\u1ea1ng: h\u1ee3p kim n\u00e0o ch\u1ed1ng m\u00f2n t\u1ed1t h\u01a1n \u2013 v\u00e0 v\u00ec sao<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Bang_xep_hang_tong_hop_theo_kha_nang_chong_an_mon_tu_cao_den_thap\" >B\u1ea3ng x\u1ebfp h\u1ea1ng t\u1ed5ng h\u1ee3p theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n (t\u1eeb cao \u0111\u1ebfn th\u1ea5p)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Tier_S_%E2%80%93_Sieu_cao_trong_moi_truong_Cl-_va_hoa_chat_khac_nghiet\" >Tier S \u2013 Si\u00eau cao trong m\u00f4i tr\u01b0\u1eddng Cl- v\u00e0 h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Tier_A_%E2%80%93_Rat_cao_cho_nuoc_loven_bienhoa_chat_an_mon_manh\" >Tier A \u2013 R\u1ea5t cao, cho n\u01b0\u1edbc l\u1ee3\/ven bi\u1ec3n\/h\u00f3a ch\u1ea5t \u0103n m\u00f2n m\u1ea1nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Tier_B_%E2%80%93_Cao_dung_tot_cho_moi_truong_bien_nhe_va_cong_nghiep_chung\" >Tier B \u2013 Cao, d\u00f9ng t\u1ed1t cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n nh\u1eb9 v\u00e0 c\u00f4ng nghi\u1ec7p chung<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Tier_C_%E2%80%93_Trung_binh_cho_noi_diaam_nhekhi_quyen_sach\" >Tier C \u2013 Trung b\u00ecnh, cho n\u1ed9i \u0111\u1ecba\/\u1ea9m nh\u1eb9\/kh\u00ed quy\u1ec3n s\u1ea1ch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Tier_D_%E2%80%93_Thap_chi_dung_kho_raonoi_that_trong_nha\" >Tier D \u2013 Th\u1ea5p, ch\u1ec9 d\u00f9ng kh\u00f4 r\u00e1o\/n\u1ed9i th\u1ea5t trong nh\u00e0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Xep_hang_theo_moi_truong_su_dung_cu_the\" >X\u1ebfp h\u1ea1ng theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#1_Khi_quyen_noi_diado_thi_it_Cl\" >1) Kh\u00ed quy\u1ec3n n\u1ed9i \u0111\u1ecba\/\u0111\u00f4 th\u1ecb (\u00edt Cl-)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#2_Ven_bien_hoi_muoi_phun_suong_muoi\" >2) Ven bi\u1ec3n, h\u01a1i mu\u1ed1i, phun s\u01b0\u01a1ng mu\u1ed1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#3_Nuoc_do_uong_xu_ly_nuoc_co_Cl\" >3) N\u01b0\u1edbc, \u0111\u1ed3 u\u1ed1ng, x\u1eed l\u00fd n\u01b0\u1edbc (c\u00f3 Cl-)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#4_Hoa_chat\" >4) H\u00f3a ch\u1ea5t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#5_Nhiet_do_caooxy_hoa\" >5) Nhi\u1ec7t \u0111\u1ed9 cao\/oxy h\u00f3a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#6_Nut_an_mon_ung_suat_SCC_do_Cl-_o_nhiet_do_cao\" >6) N\u1ee9t \u0103n m\u00f2n \u1ee9ng su\u1ea5t (SCC) do Cl- \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#So_sanh_nhanh_cac_mac_pho_bien_tai_Viet_Nam\" >So s\u00e1nh nhanh c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn t\u1ea1i Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Chon_nhanh_theo_Cl-_ppm_va_nhiet_do\" >Ch\u1ecdn nhanh theo Cl- (ppm) v\u00e0 nhi\u1ec7t \u0111\u1ed9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Gia_tri_PREN_tham_khao_de_doi_chieu_nhanh\" >Gi\u00e1 tr\u1ecb PREN tham kh\u1ea3o (\u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu nhanh)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Nhung_sai_lam_thuong_gap_lam_giam_tuoi_tho_inox\" >Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd inox<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Khuyen_nghi_lua_chon_theo_ung_dung_tai_Viet_Nam\" >Khuy\u1ebfn ngh\u1ecb l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Bao_tri_va_hoan_thien_be_mat_de_toi_da_hoa_chong_an_mon\" >B\u1ea3o tr\u00ec v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a ch\u1ed1ng \u0103n m\u00f2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Nguon_tham_khao_chinh\" >Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/inoxcuongthinh.com\/bang-xep-hang-mac-inox-theo-chong-an-mon-201-304-316-2205\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Noi_dung_chinh\"><\/span>N\u1ed9i dung ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><a href=\"#toc-0-nguyen-tac-xep-hang-hop-kim-nao-chong-mon-tot-hon-\">Nguy\u00ean t\u1eafc x\u1ebfp h\u1ea1ng: h\u1ee3p kim n\u00e0o ch\u1ed1ng m\u00f2n t\u1ed1t h\u01a1n \u2013 v\u00e0 v\u00ec sao<\/a><\/li>\n<li><a href=\"#toc-1-bang-xep-hang-tong-hop-theo-kha-nang-chong-an-mon-\">B\u1ea3ng x\u1ebfp h\u1ea1ng t\u1ed5ng h\u1ee3p theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n (t\u1eeb cao \u0111\u1ebfn th\u1ea5p)<\/a><\/li>\n<li><a href=\"#toc-2-xep-hang-theo-moi-truong-su-dung-cu-the\">X\u1ebfp h\u1ea1ng theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3<\/a><\/li>\n<li><a href=\"#toc-3-so-sanh-nhanh-cac-mac-pho-bien-tai-viet-nam\">So s\u00e1nh nhanh c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-4-chon-nhanh-theo-cl-ppm-va-nhiet-do\">Ch\u1ecdn nhanh theo Cl- (ppm) v\u00e0 nhi\u1ec7t \u0111\u1ed9<\/a><\/li>\n<li><a href=\"#toc-5-gia-tri-pren-tham-khao-de-doi-chieu-nhanh\">Gi\u00e1 tr\u1ecb PREN tham kh\u1ea3o (\u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu nhanh)<\/a><\/li>\n<li><a href=\"#toc-6-nhung-sai-lam-thuong-gap-lam-giam-tuoi-tho-inox\">Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd inox<\/a><\/li>\n<li><a href=\"#toc-7-khuyen-nghi-lua-chon-theo-ung-dung-tai-viet-nam\">Khuy\u1ebfn ngh\u1ecb l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-8-bao-tri-va-hoan-thien-be-mat-de-toi-da-hoa-chong-a\">B\u1ea3o tr\u00ec v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a ch\u1ed1ng \u0103n m\u00f2n<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Khi l\u1ef1a ch\u1ecdn inox cho c\u00f4ng tr\u00ecnh, thi\u1ebft b\u1ecb hay x\u01b0\u1edfng gia c\u00f4ng, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n l\u00e0 ti\u00eau ch\u00ed s\u1ed1 1 v\u00ec n\u00f3 quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd, an to\u00e0n v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi. B\u00e0i vi\u1ebft n\u00e0y x\u1ebfp h\u1ea1ng c\u00e1c m\u00e1c inox ph\u1ed5 bi\u1ebfn theo m\u1ee9c \u0111\u1ed9 ch\u1ed1ng \u0103n m\u00f2n, d\u1ef1a tr\u00ean th\u00f4ng s\u1ed1 PREN, c\u01a1 ch\u1ebf \u0103n m\u00f2n th\u1ef1c t\u1ebf v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng t\u1ea1i Vi\u1ec7t Nam. \u0110\u00e2y l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong b\u1ee9c tranh \u201cPh\u00e2n t\u00edch chuy\u00ean s\u00e2u v\u1ec1 c\u00e1c m\u00e1c Inox ph\u1ed5 bi\u1ebfn\u201d, nh\u01b0ng \u0111\u1ee7 \u0111\u1ea7y \u0111\u1ec3 b\u1ea1n t\u1ef1 tin ra quy\u1ebft \u0111\u1ecbnh ngay.<\/p>\n<h2 id=\"toc-0-nguyen-tac-xep-hang-hop-kim-nao-chong-mon-tot-hon-\"><span class=\"ez-toc-section\" id=\"Nguyen_tac_xep_hang_hop_kim_nao_chong_mon_tot_hon_%E2%80%93_va_vi_sao\"><\/span>Nguy\u00ean t\u1eafc x\u1ebfp h\u1ea1ng: h\u1ee3p kim n\u00e0o ch\u1ed1ng m\u00f2n t\u1ed1t h\u01a1n \u2013 v\u00e0 v\u00ec sao<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Vai tr\u00f2 c\u1ee7a th\u00e0nh ph\u1ea7n: Cr t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng ch\u1ed1ng oxy h\u00f3a; Mo t\u0103ng c\u01b0\u1eddng ch\u1ed1ng r\u1ed7\/\u0103n k\u1ebd h\u1edf trong m\u00f4i tr\u01b0\u1eddng Cl-; N t\u0103ng b\u1ec1n v\u00e0 t\u0103ng ch\u1ed1ng r\u1ed7; Ni \u1ed5n \u0111\u1ecbnh pha Austenite, gi\u00fap ch\u1ed1ng \u0103n m\u00f2n t\u1ed5ng qu\u00e1t t\u1ed1t h\u01a1n so v\u1edbi Ferrite\/Martensite \u1edf c\u00f9ng h\u00e0m l\u01b0\u1ee3ng Cr.<br \/>\n&#8211; Ch\u1ec9 s\u1ed1 PREN (Pitting Resistance Equivalent Number) l\u00e0 th\u01b0\u1edbc \u0111o quy \u01b0\u1edbc cho kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 trong m\u00f4i tr\u01b0\u1eddng ch\u1ee9a Cl-, c\u00f4ng th\u1ee9c th\u00f4ng d\u1ee5ng: PREN = %Cr + 3.3\u00d7%Mo + 16\u00d7%N. PREN c\u00e0ng cao, kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 c\u00e0ng t\u1ed1t (IMOA).<br \/>\n&#8211; \u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ed5 ch\u1ee9c:<br \/>\n  + Austenitic (304\/316\/317L\/904L\/6Mo): ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t, d\u1ec5 gia c\u00f4ng, nh\u01b0ng nh\u1ea1y c\u1ea3m n\u1ee9t \u1ee9ng su\u1ea5t Cl- \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<br \/>\n  + Ferritic (430\/439\/444): ch\u1ed1ng SCC t\u1ed1t, pitting trung b\u00ecnh \u0111\u1ebfn kh\u00e1 (444 kh\u00e1 t\u1ed1t nh\u1edd Mo), \u0111\u1ed9 d\u1ebbo th\u1ea5p h\u01a1n austenitic.<br \/>\n  + Martensitic (410\/420): \u0111\u1ed9 b\u1ec1n cao, ch\u1ed1ng m\u00f2n th\u1ea5p, d\u1ec5 r\u1ec9 trong \u1ea9m\/mu\u1ed1i.<br \/>\n  + Duplex (2205\/2507): k\u1ebft h\u1ee3p b\u1ec1n cao v\u00e0 ch\u1ed1ng \u0103n m\u00f2n Cl- r\u1ea5t t\u1ed1t, ch\u1ed1ng SCC v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n&#8211; \u201cL\u201d (304L\/316L): h\u00e0m l\u01b0\u1ee3ng C th\u1ea5p, gi\u1ea3m nh\u1ea1y c\u1ea3m \u0103n m\u00f2n tinh gi\u1edbi khi h\u00e0n. 321\/347: \u1ed5n \u0111\u1ecbnh h\u00f3a b\u1eb1ng Ti\/Nb, c\u0169ng nh\u1eb1m ch\u1ed1ng \u0103n m\u00f2n tinh gi\u1edbi khi h\u00e0n.<br \/>\n&#8211; L\u01b0u \u00fd: PREN ch\u1ee7 y\u1ebfu d\u1ef1 b\u00e1o \u0103n m\u00f2n r\u1ed7\/\u0103n k\u1ebd h\u1edf trong Cl-. N\u00f3 kh\u00f4ng ph\u1ea3n \u00e1nh \u0111\u1ea7y \u0111\u1ee7 h\u00e0nh vi trong axit \u0111\u1eb7c th\u00f9 (v\u00ed d\u1ee5 H2SO4 c\u1ea7n Ni\/Cu cao nh\u01b0 904L), hay oxy h\u00f3a nhi\u1ec7t \u0111\u1ed9 cao (310S).<\/p>\n<p>Ngu\u1ed3n: International Molybdenum Association \u2013 IMOA; Nickel Institute; Outokumpu Corrosion Handbook.<\/p>\n<h2 id=\"toc-1-bang-xep-hang-tong-hop-theo-kha-nang-chong-an-mon-\"><span class=\"ez-toc-section\" id=\"Bang_xep_hang_tong_hop_theo_kha_nang_chong_an_mon_tu_cao_den_thap\"><\/span>B\u1ea3ng x\u1ebfp h\u1ea1ng t\u1ed5ng h\u1ee3p theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n (t\u1eeb cao \u0111\u1ebfn th\u1ea5p)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>G\u1ee3i \u00fd theo \u201ctier\u201d \u0111\u1ec3 b\u1ea1n \u0111\u1ecbnh v\u1ecb nhanh. PREN mang t\u00ednh tham chi\u1ebfu (kho\u1ea3ng).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tier_S_%E2%80%93_Sieu_cao_trong_moi_truong_Cl-_va_hoa_chat_khac_nghiet\"><\/span>Tier S \u2013 Si\u00eau cao trong m\u00f4i tr\u01b0\u1eddng Cl- v\u00e0 h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 6Mo (UNS S31254\/254SMO): PREN ~42\u201345. R\u1ea5t b\u1ec1n r\u1ed7\/k\u1ebd h\u1edf trong n\u01b0\u1edbc bi\u1ec3n, kh\u1eed tr\u00f9ng b\u1eb1ng Cl-, h\u00f3a ch\u1ea5t ch\u1ee9a Cl-.<br \/>\n&#8211; Super Duplex 2507 (UNS S32750\/S32760): PREN ~41\u201345. Ch\u1ed1ng r\u1ed7\/k\u1ebd h\u1edf xu\u1ea5t s\u1eafc, b\u1ec1n cao, ch\u1ed1ng SCC r\u1ea5t t\u1ed1t.<br \/>\n\u1ee8ng d\u1ee5ng: n\u01b0\u1edbc bi\u1ec3n, RO\/Desalination, b\u1ed1c h\u01a1i mu\u1ed1i, d\u1ec7t nhu\u1ed9m n\u1eb7ng Cl-, \u0111\u00f3ng t\u00e0u, d\u1ea7u kh\u00ed ngo\u00e0i kh\u01a1i.<br \/>\nL\u01b0u \u00fd: gia c\u00f4ng\/h\u00e0n c\u1ea7n ki\u1ec3m so\u00e1t nghi\u00eam.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tier_A_%E2%80%93_Rat_cao_cho_nuoc_loven_bienhoa_chat_an_mon_manh\"><\/span>Tier A \u2013 R\u1ea5t cao, cho n\u01b0\u1edbc l\u1ee3\/ven bi\u1ec3n\/h\u00f3a ch\u1ea5t \u0103n m\u00f2n m\u1ea1nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Duplex 2205 (UNS S32205): PREN ~34\u201336. C\u00e2n b\u1eb1ng b\u1ec1n \u2013 ch\u1ed1ng Cl- r\u1ea5t t\u1ed1t.<br \/>\n&#8211; 904L (UNS N08904): PREN ~33\u201336. M\u1ea1nh trong H2SO4 lo\u00e3ng nh\u1edd Ni\/Cu cao, t\u1ed1t trong Cl- nh\u01b0ng k\u00e9m 6Mo\/2507 v\u1ec1 pitting.<br \/>\n&#8211; 317L (UNS S31703): PREN ~30\u201333. T\u1ed1t h\u01a1n 316L nh\u1edd Mo cao.<br \/>\n\u1ee8ng d\u1ee5ng: b\u1ed3n h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m m\u1eb7n, ven bi\u1ec3n kh\u1eafc nghi\u1ec7t, pickling lines (904L).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tier_B_%E2%80%93_Cao_dung_tot_cho_moi_truong_bien_nhe_va_cong_nghiep_chung\"><\/span>Tier B \u2013 Cao, d\u00f9ng t\u1ed1t cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n nh\u1eb9 v\u00e0 c\u00f4ng nghi\u1ec7p chung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 316\/316L (UNS S31600\/S31603): PREN ~24\u201326. Chu\u1ea9n m\u1eb7n\/Cl- v\u1eeba, h\u1ed3 b\u01a1i, khu v\u1ef1c ven bi\u1ec3n kh\u00f4ng tr\u1ef1c ti\u1ebfp b\u1eafn s\u00f3ng.<br \/>\n&#8211; 444 (EN 1.4521 Ferritic 19Cr-2Mo): PREN ~24. Thay th\u1ebf 316 trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng n\u01b0\u1edbc\/\u0111\u1ed3 u\u1ed1ng, \u01b0u th\u1ebf ch\u1ed1ng SCC.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tier_C_%E2%80%93_Trung_binh_cho_noi_diaam_nhekhi_quyen_sach\"><\/span>Tier C \u2013 Trung b\u00ecnh, cho n\u1ed9i \u0111\u1ecba\/\u1ea9m nh\u1eb9\/kh\u00ed quy\u1ec3n s\u1ea1ch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 304\/304L (EN 1.4301\/1.4307): PREN ~18\u201319. Chu\u1ea9n inox \u201c\u0111a d\u1ee5ng\u201d, kh\u00f4ng ph\u00f9 h\u1ee3p mu\u1ed1i cao.<br \/>\n&#8211; 439\/441 (Ferritic Ti\/Nb stabilized): PREN ~17\u201318. Thay th\u1ebf 304 trong m\u00f4i tr\u01b0\u1eddng kh\u00f4, nhi\u1ec7t x\u1ea3 kh\u00ed th\u1ea3i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tier_D_%E2%80%93_Thap_chi_dung_kho_raonoi_that_trong_nha\"><\/span>Tier D \u2013 Th\u1ea5p, ch\u1ec9 d\u00f9ng kh\u00f4 r\u00e1o\/n\u1ed9i th\u1ea5t trong nh\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 430 (EN 1.4016 Ferritic): PREN ~16\u201317. D\u1ec5 r\u1ec9 n\u1ebfu c\u00f3 mu\u1ed1i\/\u1ea9m \u0111\u1ecdng.<br \/>\n&#8211; 201\/202 (Austenitic Mn\u2013N, Ni th\u1ea5p): PREN ~16\u201318 nh\u01b0ng nh\u1ea1y r\u1ed7\/ch\u1ea5m g\u1ec9 trong Cl-, d\u1ec5 x\u1ec9n ngo\u00e0i tr\u1eddi ven bi\u1ec3n.<br \/>\n&#8211; 410\/420 (Martensitic): PREN ~12\u201313. Ch\u1ee7 y\u1ebfu v\u00ec t\u00ednh c\u01a1, kh\u00f4ng v\u00ec ch\u1ed1ng \u0103n m\u00f2n.<\/p>\n<p>Ngu\u1ed3n d\u1eef li\u1ec7u th\u00e0nh ph\u1ea7n\/PREN: IMOA; Nickel Institute; datasheet nh\u00e0 s\u1ea3n xu\u1ea5t (Outokumpu, Alleima).<\/p>\n<h2 id=\"toc-2-xep-hang-theo-moi-truong-su-dung-cu-the\"><span class=\"ez-toc-section\" id=\"Xep_hang_theo_moi_truong_su_dung_cu_the\"><\/span>X\u1ebfp h\u1ea1ng theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Khi_quyen_noi_diado_thi_it_Cl\"><\/span>1) Kh\u00ed quy\u1ec3n n\u1ed9i \u0111\u1ecba\/\u0111\u00f4 th\u1ecb (\u00edt Cl-)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; T\u1ed1t nh\u1ea5t \u0111\u1ebfn \u0111\u1ee7 d\u00f9ng: 316L \u2265 304L \u2248 439\/441 > 430 > 201.<br \/>\n&#8211; G\u1ee3i \u00fd: 304L\/439 cho m\u1eb7t d\u1ef1ng, lan can trong n\u1ed9i \u0111\u1ecba; \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn (2B\/BA) \u0111\u1ec3 gi\u1ea3m b\u00e1m b\u1ea9n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Ven_bien_hoi_muoi_phun_suong_muoi\"><\/span>2) Ven bi\u1ec3n, h\u01a1i mu\u1ed1i, phun s\u01b0\u01a1ng mu\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp h\u01a1i mu\u1ed1i\/xy gi\u00f3 bi\u1ec3n: 2205 \u2265 444 \u2248 316L >> 304L \u2248 201\/430 (kh\u00f4ng khuy\u1ebfn ngh\u1ecb).<br \/>\n&#8211; S\u00e1t bi\u1ec3n (phun s\u00f3ng, k\u1ebft tinh mu\u1ed1i): 2507\/6Mo > 2205 > 316L (b\u1ea3o tr\u00ec d\u00e0y) \u2013 tr\u00e1nh 304\/201.<br \/>\n&#8211; Th\u1ef1c t\u1ebf Vi\u1ec7t Nam: 304 ngo\u00e0i tr\u1eddi ven bi\u1ec3n th\u01b0\u1eddng b\u1ecb r\u1ed7\/ch\u1ea5m g\u1ec9 sau 6\u201318 th\u00e1ng n\u1ebfu kh\u00f4ng r\u1eeda \u0111\u1ecbnh k\u1ef3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Nuoc_do_uong_xu_ly_nuoc_co_Cl\"><\/span>3) N\u01b0\u1edbc, \u0111\u1ed3 u\u1ed1ng, x\u1eed l\u00fd n\u01b0\u1edbc (c\u00f3 Cl-)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; N\u01b0\u1edbc m\u00e1y <200 ppm Cl-, \u226425\u00b0C: 304L d\u00f9ng \u0111\u01b0\u1ee3c; >200 ppm ho\u1eb7c \u1ea5m h\u01a1n: 316L.<br \/>\n&#8211; 1,000\u20133,000 ppm Cl-: 2205. >3,000 ppm: 6Mo\/2507.<br \/>\nNgu\u1ed3n khuy\u1ebfn ngh\u1ecb theo Cl-: IMOA, Nickel Institute.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Hoa_chat\"><\/span>4) H\u00f3a ch\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; HCl (d\u00f9 lo\u00e3ng): t\u1ea5t c\u1ea3 austenitic th\u00f4ng th\u01b0\u1eddng (304\/316) \u0111\u1ec1u k\u00e9m; c\u1ea7n h\u1ee3p kim cao Mo\/Ni (904L\/6Mo) v\u00e0 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9\/th\u1eddi gian ti\u1ebfp x\u00fac.<br \/>\n&#8211; H2SO4: 304\/316 ch\u1ec9 ph\u00f9 h\u1ee3p n\u1ed3ng \u0111\u1ed9 th\u1ea5p v\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p; 904L \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho H2SO4 lo\u00e3ng\u2013trung b\u00ecnh.<br \/>\n&#8211; HNO3: 304\/321 r\u1ea5t t\u1ed1t trong m\u00f4i tr\u01b0\u1eddng oxi h\u00f3a nh\u01b0 HNO3.<br \/>\n&#8211; Ki\u1ec1m (NaOH, KOH): 304\/316 th\u01b0\u1eddng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u1edf nhi\u1ec7t \u0111\u1ed9 v\u1eeba; tham kh\u1ea3o \u0111\u01b0\u1eddng cong \u0103n m\u00f2n c\u1ee5 th\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Nhiet_do_caooxy_hoa\"><\/span>5) Nhi\u1ec7t \u0111\u1ed9 cao\/oxy h\u00f3a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 310S (25Cr-20Ni) n\u1ed5i b\u1eadt v\u1ec1 ch\u1ecbu oxy h\u00f3a \u0111\u1ebfn ~1,050\u00b0C nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho n\u01b0\u1edbc m\u1eb7n \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng.<br \/>\n&#8211; 321\/347 ch\u1ed1ng \u0103n m\u00f2n tinh gi\u1edbi sau h\u00e0n t\u1ed1t h\u01a1n 304 \u1edf d\u1ecbch v\u1ee5 nhi\u1ec7t chu k\u1ef3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Nut_an_mon_ung_suat_SCC_do_Cl-_o_nhiet_do_cao\"><\/span>6) N\u1ee9t \u0103n m\u00f2n \u1ee9ng su\u1ea5t (SCC) do Cl- \u1edf nhi\u1ec7t \u0111\u1ed9 cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Ch\u1ed1ng SCC t\u1ed1t: Ferritic (444) v\u00e0 Duplex (2205\/2507).<br \/>\n&#8211; Nh\u1ea1y SCC: Austenitic Ni cao (304\/316\/317L\/904L) \u1edf >60\u00b0C trong Cl-.<\/p>\n<p>Ngu\u1ed3n: Nickel Institute; Outokumpu Corrosion Handbook.<\/p>\n<h2 id=\"toc-3-so-sanh-nhanh-cac-mac-pho-bien-tai-viet-nam\"><span class=\"ez-toc-section\" id=\"So_sanh_nhanh_cac_mac_pho_bien_tai_Viet_Nam\"><\/span>So s\u00e1nh nhanh c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn t\u1ea1i Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; 201 vs 304: 201 r\u1ebb h\u01a1n, \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc kh\u00e1, nh\u01b0ng ch\u1ed1ng r\u1ed7\/\u1ed1 k\u00e9m r\u00f5 r\u1ec7t trong Cl-. 304 v\u01b0\u1ee3t tr\u1ed9i \u1edf ngo\u00e0i tr\u1eddi, \u0111\u1ed3 b\u1ebfp, c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m.<br \/>\n&#8211; 304 vs 316L: 316L h\u01a1n nh\u1edd Mo (pitting\/crevice). N\u1ebfu g\u1ea7n bi\u1ec3n, h\u1ed3 b\u01a1i, kh\u1eed tr\u00f9ng b\u1eb1ng Cl-: \u01b0u ti\u00ean 316L.<br \/>\n&#8211; 430 vs 304: 430 h\u1ee3p n\u1ed9i th\u1ea5t kh\u00f4, trang tr\u00ed trong nh\u00e0; 304 h\u1ee3p ngo\u1ea1i th\u1ea5t\/c\u00f4ng nghi\u1ec7p \u1ea9m.<br \/>\n&#8211; 321\/347 vs 304L: n\u1ebfu h\u00e0n d\u00e0y\/nhi\u1ec7t cao, 321\/347 ho\u1eb7c 304L \u0111\u1ec3 gi\u1ea3m \u0103n m\u00f2n tinh gi\u1edbi.<br \/>\n&#8211; 444 (Ferritic Mo): c\u00f3 th\u1ec3 thay 316L trong b\u1ed3n n\u01b0\u1edbc\/n\u01b0\u1edbc n\u00f3ng, ch\u1ed1ng SCC t\u1ed1t, gi\u00e1 c\u1ea1nh tranh.<br \/>\n&#8211; 2205 Duplex: gi\u1ea3i ph\u00e1p \u201cgi\u1eefa\u201d 316L v\u00e0 904L\/6Mo, v\u1eeba b\u1ec1n c\u01a1, v\u1eeba ch\u1ed1ng Cl- t\u1ed1t \u2013 t\u1ed1i \u01b0u cho ven bi\u1ec3n, nh\u00e0 m\u00e1y mu\u1ed1i, th\u1ee7y s\u1ea3n.<br \/>\n&#8211; 904L: d\u00f9ng khi c\u00f3 H2SO4\/Cl- ph\u1ee9c t\u1ea1p; chi ph\u00ed cao, gia c\u00f4ng\/h\u00e0n \u0111\u00f2i h\u1ecfi kinh nghi\u1ec7m.<br \/>\n&#8211; 310S: ch\u1ecdn v\u00ec ch\u1ecbu nhi\u1ec7t, kh\u00f4ng v\u00ec ch\u1ed1ng r\u1ed7 n\u01b0\u1edbc mu\u1ed1i.<\/p>\n<h2 id=\"toc-4-chon-nhanh-theo-cl-ppm-va-nhiet-do\"><span class=\"ez-toc-section\" id=\"Chon_nhanh_theo_Cl-_ppm_va_nhiet_do\"><\/span>Ch\u1ecdn nhanh theo Cl- (ppm) v\u00e0 nhi\u1ec7t \u0111\u1ed9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; N\u01b0\u1edbc\/\u1ea9m <200 ppm Cl-, \u226425\u00b0C: 304L.  \n- 200\u20131,000 ppm ho\u1eb7c 25\u201350\u00b0C: 316L.  \n- 1,000\u20133,000 ppm ho\u1eb7c 50\u201370\u00b0C: 2205.  \n- >3,000 ppm, k\u1ebd h\u1edf nhi\u1ec1u, ho\u1eb7c >70\u00b0C: 6Mo\/2507; c\u00e2n nh\u1eafc 904L n\u1ebfu c\u00f3 H2SO4.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng kh\u1eed tr\u00f9ng b\u1eb1ng NaOCl\/ClO-: \u01b0u ti\u00ean 316L tr\u1edf l\u00ean; h\u1ea1n ch\u1ebf k\u1ebd h\u1edf, v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3.<br \/>\nNgu\u1ed3n: IMOA, Nickel Institute (h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn theo Cl-).<\/p>\n<h2 id=\"toc-5-gia-tri-pren-tham-khao-de-doi-chieu-nhanh\"><span class=\"ez-toc-section\" id=\"Gia_tri_PREN_tham_khao_de_doi_chieu_nhanh\"><\/span>Gi\u00e1 tr\u1ecb PREN tham kh\u1ea3o (\u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu nhanh)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; 201: ~16\u201318; 430: ~16\u201317; 304\/304L\/321: ~18\u201319.<br \/>\n&#8211; 316\/316L: ~24\u201326; 444: ~24; 317L: ~30\u201333.<br \/>\n&#8211; 2205: ~34\u201336; 904L: ~33\u201336.<br \/>\n&#8211; 2507: ~41\u201345; 6Mo (254SMO): ~42\u201345.<\/p>\n<h2 id=\"toc-6-nhung-sai-lam-thuong-gap-lam-giam-tuoi-tho-inox\"><span class=\"ez-toc-section\" id=\"Nhung_sai_lam_thuong_gap_lam_giam_tuoi_tho_inox\"><\/span>Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd inox<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; D\u00f9ng 201\/430 cho ngo\u00e0i tr\u1eddi ven bi\u1ec3n: nhanh r\u1ed7\/ch\u1ea5m g\u1ec9.<br \/>\n&#8211; Ch\u1ecdn 304 cho h\u1ed3 b\u01a1i\/kh\u1eed tr\u00f9ng Cl-: d\u1ec5 r\u1ed7\/\u0103n k\u1ebd h\u1edf; ch\u1ecdn 316L\/2205.<br \/>\n&#8211; Kh\u00f4ng x\u1eed l\u00fd m\u1ed1i h\u00e0n: m\u00e0u ram\/oxit sau h\u00e0n ph\u00e1 th\u1ee5 \u0111\u1ed9ng \u2013 c\u1ea7n pickling\/passivation v\u00e0 l\u00e0m s\u1ea1ch.<br \/>\n&#8211; B\u1ec1 m\u1eb7t nh\u00e1m\/k\u1ebd h\u1edf: t\u0103ng gi\u1eef mu\u1ed1i\/\u1ea9m \u2013 \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn, h\u1ea1n ch\u1ebf khe b\u1eaft b\u1ea9n.<br \/>\n&#8211; Nhi\u1ec5m Fe t\u1eeb d\u1ee5ng c\u1ee5 th\u00e9p carbon: g\u00e2y g\u1ec9 ngo\u1ea1i lai \u2013 c\u1ea7n d\u1ee5ng c\u1ee5 s\u1ea1ch, ch\u1ed5i Inox.<br \/>\n&#8211; B\u1ecf qua \u201cL\u201d\/321 khi h\u00e0n d\u00e0y: g\u00e2y \u0103n m\u00f2n tinh gi\u1edbi theo th\u1eddi gian.<\/p>\n<h2 id=\"toc-7-khuyen-nghi-lua-chon-theo-ung-dung-tai-viet-nam\"><span class=\"ez-toc-section\" id=\"Khuyen_nghi_lua_chon_theo_ung_dung_tai_Viet_Nam\"><\/span>Khuy\u1ebfn ngh\u1ecb l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Lan can\/m\u1eb7t d\u1ef1ng n\u1ed9i \u0111\u1ecba: 304L ho\u1eb7c 439 (chi ph\u00ed t\u1ed1i \u01b0u).<br \/>\n&#8211; Ngo\u1ea1i th\u1ea5t ven bi\u1ec3n, b\u1ebfn t\u00e0u: 2205; n\u1ebfu s\u00e1t bi\u1ec3n\/phun s\u00f3ng: 2507\/6Mo.<br \/>\n&#8211; B\u1ed3n n\u01b0\u1edbc n\u00f3ng, R\/O, th\u1ef1c ph\u1ea9m m\u1eb7n: 316L ho\u1eb7c 444 (t\u00f9y n\u1ed3ng \u0111\u1ed9 Cl-).<br \/>\n&#8211; H\u00f3a ch\u1ea5t c\u00f3 H2SO4 v\u00e0\/ho\u1eb7c Cl-: 904L\/6Mo; tham v\u1ea5n nh\u00e0 cung c\u1ea5p v\u1ec1 \u0111\u01b0\u1eddng cong \u0103n m\u00f2n c\u1ee5 th\u1ec3.<br \/>\n&#8211; \u1ed0ng x\u1ea3, nhi\u1ec7t \u00f4 t\u00f4: 439\/441\/409 (kinh t\u1ebf, ch\u1ecbu nhi\u1ec7t\/\u0103n m\u00f2n kh\u00ed th\u1ea3i).<\/p>\n<h2 id=\"toc-8-bao-tri-va-hoan-thien-be-mat-de-toi-da-hoa-chong-a\"><span class=\"ez-toc-section\" id=\"Bao_tri_va_hoan_thien_be_mat_de_toi_da_hoa_chong_an_mon\"><\/span>B\u1ea3o tr\u00ec v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a ch\u1ed1ng \u0103n m\u00f2n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Ch\u1ecdn ho\u00e0n thi\u1ec7n m\u1ecbn (2B\/BA\/No.4 m\u1ecbn) cho m\u00f4i tr\u01b0\u1eddng \u1ea9m\/mu\u1ed1i.<br \/>\n&#8211; T\u1ea9y g\u1ec9\u2013th\u1ee5 \u0111\u1ed9ng sau h\u00e0n, r\u1eeda \u0111\u1ecbnh k\u1ef3 b\u1eb1ng n\u01b0\u1edbc ng\u1ecdt \u1edf ven bi\u1ec3n.<br \/>\n&#8211; Tr\u00e1nh k\u1ebd h\u1edf, g\u00f3c ch\u1ebft; thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc t\u1ed1t.<br \/>\n&#8211; Kh\u00f4ng d\u00f9ng t\u1ea9y clo n\u1ed3ng \u0111\u1ed9 cao k\u00e9o d\u00e0i tr\u00ean 304\/201; n\u1ebfu b\u1eaft bu\u1ed9c, \u01b0u ti\u00ean 316L\/duplex.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao-chinh\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao_chinh\"><\/span>Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; International Molybdenum Association (IMOA): Pitting Resistance Equivalent Number (PREN) v\u00e0 l\u1ef1a ch\u1ecdn theo Cl-. https:\/\/www.imoa.info<br \/>\n&#8211; Nickel Institute: Guidelines for Corrosion Resistant Materials Selection. https:\/\/nickelinstitute.org<br \/>\n&#8211; Outokumpu Corrosion Handbook &#038; datasheet v\u1eadt li\u1ec7u (304\/316\/2205\/904L\/2507\/254SMO). https:\/\/www.outokumpu.com<\/p>\n<h2 id=\"toc-10-ket-luan\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Th\u1ee9 h\u1ea1ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed5ng qu\u00e1t: 6Mo\/2507 (Tier S) > 2205\/904L\/317L (Tier A) > 316L\/444 (Tier B) > 304L\/439 (Tier C) > 430\/201\/410 (Tier D).<br \/>\n&#8211; L\u1ef1a ch\u1ecdn ph\u1ea3i g\u1eafn v\u1edbi m\u00f4i tr\u01b0\u1eddng th\u1ef1c: n\u1ed3ng \u0111\u1ed9 Cl-, nhi\u1ec7t \u0111\u1ed9, k\u1ebd h\u1edf, h\u00f3a ch\u1ea5t \u0111\u1eb7c th\u00f9 v\u00e0 ph\u01b0\u01a1ng \u00e1n h\u00e0n\/b\u1ec1 m\u1eb7t.<br \/>\n&#8211; D\u00f9ng PREN nh\u01b0 la b\u00e0n cho pitting trong Cl-, nh\u01b0ng lu\u00f4n ki\u1ec3m tra \u0111\u01b0\u1eddng cong \u0103n m\u00f2n h\u00f3a ch\u1ea5t c\u1ee5 th\u1ec3 v\u00e0 th\u1ef1c ti\u1ec5n b\u1ea3o tr\u00ec.<br \/>\n&#8211; V\u1edbi h\u1ea7u h\u1ebft nhu c\u1ea7u c\u00f4ng nghi\u1ec7p t\u1ea1i Vi\u1ec7t Nam: 304L cho n\u1ed9i \u0111\u1ecba; 316L\/444 khi c\u00f3 Cl-; 2205 cho ven bi\u1ec3n kh\u1eafc nghi\u1ec7t; 904L\/6Mo khi h\u00f3a ch\u1ea5t kh\u00f3\/Cl- r\u1ea5t cao.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n chi ti\u1ebft theo \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 v\u00e0 nh\u1eadn b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh: Hotline 0343.417.281 \u2013 Email inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>X\u1ebfp h\u1ea1ng inox theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n d\u1ef1a tr\u00ean PREN, c\u01a1 ch\u1ebf \u0103n m\u00f2n v\u00e0 m\u00f4i tr\u01b0\u1eddng. So s\u00e1nh 201, 304, 316, 430, 2205, 904L, 6Mo \u0111\u1ec3 ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u.<\/p>\n","protected":false},"author":7,"featured_media":1019,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=2538"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2538\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1019"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}