{"id":2458,"date":"2026-08-17T12:34:15","date_gmt":"2026-08-17T05:34:15","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/"},"modified":"2026-08-17T12:34:15","modified_gmt":"2026-08-17T05:34:15","slug":"xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/","title":{"rendered":"X\u1eed l\u00fd \u1ed1 v\u00e0ng, c\u1eb7n canxi, v\u1ebft ch\u00e1y tr\u00ean inox: h\u01b0\u1edbng d\u1eabn"},"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;2458&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;X\u1eed l\u00fd \u1ed1 v\u00e0ng, c\u1eb7n canxi, v\u1ebft ch\u00e1y tr\u00ean inox: h\u01b0\u1edbng d\u1eabn&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 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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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Vi_sao_inox_van_bi_o_va_ban\" >V\u00ec sao inox v\u1eabn b\u1ecb \u1ed1 v\u00e0 b\u1ea9n?<\/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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Nguyen_tac_vang_khi_lam_sach_inox\" >Nguy\u00ean t\u1eafc v\u00e0ng khi l\u00e0m s\u1ea1ch inox<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Quy_trinh_xu_ly_theo_tung_loai_vet_ban\" >Quy tr\u00ecnh x\u1eed l\u00fd theo t\u1eebng lo\u1ea1i v\u1ebft b\u1ea9n<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#1_Vet_o_vang_tea_staining_loang_o_nhe\" >1) V\u1ebft \u1ed1 v\u00e0ng (tea staining, loang \u1ed1 nh\u1eb9)<\/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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#2_Can_canxi_limescale_vet_nuoc_cung\" >2) C\u1eb7n canxi (limescale, v\u1ec7t n\u01b0\u1edbc c\u1ee9ng)<\/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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#3_Vet_chay_chay_khet_va_%E2%80%9Cheat_tint%E2%80%9D\" >3) V\u1ebft ch\u00e1y, ch\u00e1y kh\u00e9t v\u00e0 \u201cheat tint\u201d<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Chon_hoa_chat_va_dung_cu_theo_cap_do_ban\" >Ch\u1ecdn h\u00f3a ch\u1ea5t v\u00e0 d\u1ee5ng c\u1ee5 theo c\u1ea5p \u0111\u1ed9 b\u1ea9n<\/a><\/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\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Phong_ngua_tai_ban_va_toi_uu_do_ben\" >Ph\u00f2ng ng\u1eeba t\u00e1i b\u1ea9n v\u00e0 t\u1ed1i \u01b0u \u0111\u1ed9 b\u1ec1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Cau_hoi_thuong_gap\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#An_toan_va_moi_truong\" >An to\u00e0n v\u00e0 m\u00f4i tr\u01b0\u1eddng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Vi_du_thuc_te_tai_xuong\" >V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/inoxcuongthinh.com\/xu-ly-o-vang-can-canxi-vet-chay-tren-inox-huong-dan\/#Nguon_tham_khao\" >Ngu\u1ed3n tham kh\u1ea3o<\/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-vi-sao-inox-van-bi-o-va-ban\">V\u00ec sao inox v\u1eabn b\u1ecb \u1ed1 v\u00e0 b\u1ea9n?<\/a><\/li>\n<li><a href=\"#toc-1-nguyen-tac-vang-khi-lam-sach-inox\">Nguy\u00ean t\u1eafc v\u00e0ng khi l\u00e0m s\u1ea1ch inox<\/a><\/li>\n<li><a href=\"#toc-2-quy-trinh-xu-ly-theo-tung-loai-vet-ban\">Quy tr\u00ecnh x\u1eed l\u00fd theo t\u1eebng lo\u1ea1i v\u1ebft b\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-3-chon-hoa-chat-va-dung-cu-theo-cap-do-ban\">Ch\u1ecdn h\u00f3a ch\u1ea5t v\u00e0 d\u1ee5ng c\u1ee5 theo c\u1ea5p \u0111\u1ed9 b\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-4-phong-ngua-tai-ban-va-toi-uu-do-ben\">Ph\u00f2ng ng\u1eeba t\u00e1i b\u1ea9n v\u00e0 t\u1ed1i \u01b0u \u0111\u1ed9 b\u1ec1n<\/a><\/li>\n<li><a href=\"#toc-5-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-6-an-toan-va-moi-truong\">An to\u00e0n v\u00e0 m\u00f4i tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-7-vi-du-thuc-te-tai-xuong\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/a><\/li>\n<li><a href=\"#toc-8-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox b\u1ec1n, s\u1ea1ch v\u00e0 ch\u1ecbu \u0103n m\u00f2n t\u1ed1t, nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n \u1ed1 v\u00e0ng, c\u1eb7n canxi hay v\u1ebft ch\u00e1y do n\u01b0\u1edbc c\u1ee9ng, ch\u1ea5t t\u1ea9y kh\u00f4ng ph\u00f9 h\u1ee3p, nhi\u1ec7t cao ho\u1eb7c l\u1eabn t\u1ea1p s\u1eaft. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p quy tr\u00ecnh x\u1eed l\u00fd d\u1ee9t \u0111i\u1ec3m t\u1eebng lo\u1ea1i v\u1ebft b\u1ea9n c\u1ee9ng \u0111\u1ea7u tr\u00ean inox, k\u00e8m l\u01b0u \u00fd an to\u00e0n, l\u1ef1a ch\u1ecdn h\u00f3a ch\u1ea5t, v\u00e0 c\u00e1ch ph\u00f2ng ng\u1eeba t\u00e1i b\u1ea9n. \u0110\u00e2y l\u00e0 m\u1ed9t n\u1ed9i dung thi\u1ebft y\u1ebfu trong t\u1ed5ng th\u1ec3 b\u1ea3o d\u01b0\u1ee1ng \u2013 v\u1ec7 sinh \u2013 ph\u1ee5c h\u1ed3i b\u1ec1 m\u1eb7t inox t\u1ea1i nh\u00e0 x\u01b0\u1edfng v\u00e0 c\u00f4ng tr\u00ecnh.<\/p>\n<h2 id=\"toc-0-vi-sao-inox-van-bi-o-va-ban\"><span class=\"ez-toc-section\" id=\"Vi_sao_inox_van_bi_o_va_ban\"><\/span>V\u00ec sao inox v\u1eabn b\u1ecb \u1ed1 v\u00e0 b\u1ea9n?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; L\u1edbp th\u1ee5 \u0111\u1ed9ng Cr2O3 b\u1ea3o v\u1ec7 inox c\u00f3 th\u1ec3 suy y\u1ebfu khi:<br \/>\n  &#8211; Ti\u1ebfp x\u00fac ion chloride (n\u01b0\u1edbc bi\u1ec3n, ch\u1ea5t t\u1ea9y ch\u1ee9a clo).<br \/>\n  &#8211; B\u1ecb l\u1eabn h\u1ea1t s\u1eaft t\u1ef1 do t\u1eeb d\u1ee5ng c\u1ee5 th\u00e9p carbon, b\u1ee5i m\u00e0i.<br \/>\n  &#8211; T\u1ed3n \u0111\u1ecdng n\u01b0\u1edbc c\u1ee9ng g\u00e2y c\u1eb7n CaCO3\/MgCO3.<br \/>\n  &#8211; Nhi\u1ec7t cao t\u1ea1o \u201cheat tint\u201d (v\u1ec7t xanh t\u00edm) quanh v\u00f9ng gia c\u00f4ng, ho\u1eb7c ch\u00e1y kh\u00e9t th\u1ef1c ph\u1ea9m.<br \/>\n&#8211; C\u1ea5p m\u00e1c v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; 316 ch\u1ed1ng \u0103n m\u00f2n chloride t\u1ed1t h\u01a1n 304, 304 t\u1ed1t h\u01a1n 201.<br \/>\n  &#8211; B\u1ec1 m\u1eb7t m\u1ecbn, b\u00f3ng g\u01b0\u01a1ng \u00edt gi\u1eef b\u1ea9n h\u01a1n x\u01b0\u1edbc hairline\/satin.<br \/>\n&#8211; Thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh: \u0111\u1ecdng n\u01b0\u1edbc, k\u1ebd h\u1edf, kh\u00f4ng lau kh\u00f4\u2026 l\u00e0m t\u0103ng nguy c\u01a1 \u1ed1 v\u00e0 b\u1ea9n.<br \/>\n[Ngu\u1ed3n: Nickel Institute; ASSDA \u2013 Tea Staining; BSSA \u2013 Cleaning Stainless Steel]<\/p>\n<h2 id=\"toc-1-nguyen-tac-vang-khi-lam-sach-inox\"><span class=\"ez-toc-section\" id=\"Nguyen_tac_vang_khi_lam_sach_inox\"><\/span>Nguy\u00ean t\u1eafc v\u00e0ng khi l\u00e0m s\u1ea1ch inox<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Th\u1eed tr\u00ean v\u00f9ng khu\u1ea5t tr\u01b0\u1edbc khi l\u00e0m to\u00e0n b\u1ed9.<br \/>\n&#8211; T\u1eeb nh\u1eb9 \u0111\u1ebfn m\u1ea1nh: n\u01b0\u1edbc \u1ea5m\/x\u00e0 ph\u00f2ng \u2192 axit h\u1eefu c\u01a1 nh\u1eb9 \u2192 chuy\u00ean d\u1ee5ng \u2192 c\u01a1 h\u1ecdc\/pickling.<br \/>\n&#8211; Tr\u00e1nh ho\u00e0n to\u00e0n: Javel\/chlorine, HCl (axit clohydric), len th\u00e9p (steel wool).<br \/>\n&#8211; D\u1ee5ng c\u1ee5: kh\u0103n microfiber, mi\u1ebfng ch\u00e0 nylon m\u1ecbn (theo th\u1edb), dao nh\u1ef1a; kh\u00f4ng d\u00f9ng m\u0169i kim lo\u1ea1i.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t th\u1eddi gian ti\u1ebfp x\u00fac h\u00f3a ch\u1ea5t; kh\u00f4ng \u0111\u1ec3 kh\u00f4 tr\u00ean b\u1ec1 m\u1eb7t.<br \/>\n&#8211; R\u1eeda th\u1eadt k\u1ef9 b\u1eb1ng n\u01b0\u1edbc s\u1ea1ch, lau kh\u00f4 ngay \u0111\u1ec3 kh\u00f4ng t\u1ea1o v\u1ec7t n\u01b0\u1edbc.<br \/>\n&#8211; Trang b\u1ecb b\u1ea3o h\u1ed9 \u0111\u1ea7y \u0111\u1ee7 (g\u0103ng, k\u00ednh, kh\u1ea9u trang), th\u00f4ng tho\u00e1ng gi\u00f3.<\/p>\n<h2 id=\"toc-2-quy-trinh-xu-ly-theo-tung-loai-vet-ban\"><span class=\"ez-toc-section\" id=\"Quy_trinh_xu_ly_theo_tung_loai_vet_ban\"><\/span>Quy tr\u00ecnh x\u1eed l\u00fd theo t\u1eebng lo\u1ea1i v\u1ebft b\u1ea9n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Vet_o_vang_tea_staining_loang_o_nhe\"><\/span>1) V\u1ebft \u1ed1 v\u00e0ng (tea staining, loang \u1ed1 nh\u1eb9)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u1ea5u hi\u1ec7u: \u1ed1 v\u00e0ng\/n\u00e2u nh\u1ea1t, \u0111\u1eb7c bi\u1ec7t \u1edf khu v\u1ef1c g\u1ea7n bi\u1ec3n, b\u1ec3 b\u01a1i, ngo\u00e0i tr\u1eddi; th\u01b0\u1eddng do chloride v\u00e0 t\u1ea1p s\u1eaft.<\/p>\n<p>Quy tr\u00ecnh \u0111\u1ec1 xu\u1ea5t:<br \/>\n&#8211; B\u01b0\u1edbc 1 \u2013 T\u1ea9y r\u1eeda c\u01a1 b\u1ea3n:<br \/>\n  &#8211; Pha n\u01b0\u1edbc \u1ea5m v\u1edbi ch\u1ea5t t\u1ea9y r\u1eeda pH trung t\u00ednh, lau theo th\u1edb. R\u1eeda s\u1ea1ch, lau kh\u00f4.<br \/>\n&#8211; B\u01b0\u1edbc 2 \u2013 T\u1ea9y \u1ed1 b\u1eb1ng h\u00f3a ch\u1ea5t nh\u1eb9:<br \/>\n  &#8211; D\u00f9ng b\u1ed9t nh\u00e3o NaHCO3 (baking soda + \u00edt n\u01b0\u1edbc) thoa 5\u201310 ph\u00fat, ch\u00e0 nh\u1eb9 b\u1eb1ng pad nylon m\u1ecbn, theo th\u1edb. R\u1eeda s\u1ea1ch, lau kh\u00f4.<br \/>\n  &#8211; Ho\u1eb7c d\u00f9ng ch\u1ea5t t\u1ea9y ch\u1ee9a axit oxalic (v\u00ed d\u1ee5: lo\u1ea1i \u201cBKF\u201d) theo h\u01b0\u1edbng d\u1eabn, kh\u00f4ng \u0111\u1ec3 kh\u00f4 tr\u00ean b\u1ec1 m\u1eb7t. R\u1eeda k\u1ef9.<br \/>\n&#8211; B\u01b0\u1edbc 3 \u2013 Axit h\u1eefu c\u01a1 \u0111\u1ec3 d\u1ee9t \u0111i\u1ec3m v\u00e0 t\u00e1i th\u1ee5 \u0111\u1ed9ng:<br \/>\n  &#8211; Dung d\u1ecbch axit citric 5\u201310% ho\u1eb7c gi\u1ea5m tr\u1eafng 5\u20138%: thoa\/\u0111\u1eafp 5\u201310 ph\u00fat, ch\u00e0 nh\u1eb9, r\u1eeda th\u1eadt s\u1ea1ch v\u00e0 lau kh\u00f4. Citric gi\u00fap lo\u1ea1i s\u1eaft t\u1ef1 do v\u00e0 h\u1ed7 tr\u1ee3 t\u00e1i th\u1ee5 \u0111\u1ed9ng b\u1ec1 m\u1eb7t.<br \/>\n&#8211; B\u01b0\u1edbc 4 \u2013 N\u1ebfu v\u1eabn c\u00f2n v\u1ec7t c\u1ee9ng \u0111\u1ea7u:<br \/>\n  &#8211; D\u00f9ng gel t\u1ea9y \u1ed1 chuy\u00ean d\u1ee5ng cho inox (kh\u00f4ng ch\u1ee9a chloride), tu\u00e2n th\u1ee7 th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. R\u1eeda \u2013 trung h\u00f2a \u2013 lau kh\u00f4.<\/p>\n<p>Ph\u00f2ng ng\u1eeba:<br \/>\n&#8211; Sau m\u1ed7i l\u1ea7n ti\u1ebfp x\u00fac n\u01b0\u1edbc mu\u1ed1i\/h\u00f3a ch\u1ea5t h\u1ed3 b\u01a1i, r\u1eeda l\u1ea1i b\u1eb1ng n\u01b0\u1edbc ng\u1ecdt v\u00e0 lau kh\u00f4.<br \/>\n&#8211; \u0110\u1ecbnh k\u1ef3 v\u1ec7 sinh nh\u1eb9 b\u1eb1ng x\u00e0 ph\u00f2ng pH trung t\u00ednh; b\u00f4i l\u1edbp b\u1ea3o v\u1ec7 m\u1ecfng (s\u00e1p vi tinh th\u1ec3 ho\u1eb7c d\u1ea7u b\u1ea3o d\u01b0\u1ee1ng cho inox) \u0111\u1ec3 \u0111\u1ea9y n\u01b0\u1edbc.<br \/>\n&#8211; Ch\u1ecdn m\u00e1c 304\/316 \u1edf m\u00f4i tr\u01b0\u1eddng chloride; tr\u00e1nh d\u1ee5ng c\u1ee5 m\u00e0i\/ch\u1ed5i th\u00e9p carbon tr\u00ean inox.<br \/>\n[Ngu\u1ed3n: ASSDA \u2013 Preventing Tea Staining; ASTM A967 \u2013 Passivation]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Can_canxi_limescale_vet_nuoc_cung\"><\/span>2) C\u1eb7n canxi (limescale, v\u1ec7t n\u01b0\u1edbc c\u1ee9ng)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u1ea5u hi\u1ec7u: v\u1ec7t tr\u1eafng \u0111\u1ee5c, nh\u00e1m; b\u00e1m quanh v\u00f2i, ch\u1eadu r\u1eeda, b\u1ed3n, thi\u1ebft b\u1ecb n\u01b0\u1edbc n\u00f3ng, b\u1ec1 m\u1eb7t hay \u0111\u1ecdng n\u01b0\u1edbc.<\/p>\n<p>Quy tr\u00ecnh \u0111\u1ec1 xu\u1ea5t:<br \/>\n&#8211; B\u01b0\u1edbc 1 \u2013 M\u1ec1m h\u00f3a v\u00e0 b\u00f3c t\u00e1ch:<br \/>\n  &#8211; Th\u1ea5m kh\u0103n\/gi\u1ea5y v\u1edbi gi\u1ea5m tr\u1eafng 5\u20138% ho\u1eb7c dung d\u1ecbch citric 5\u201310%, \u0111\u1eafp l\u00ean v\u00f9ng c\u1eb7n 10\u201320 ph\u00fat. Kh\u00f4ng \u0111\u1ec3 kh\u00f4; c\u00f3 th\u1ec3 ph\u1ee7 nylon \u0111\u1ec3 gi\u1eef \u1ea9m.<br \/>\n&#8211; B\u01b0\u1edbc 2 \u2013 Ch\u00e0 v\u00e0 c\u1ea1o nh\u1eb9:<br \/>\n  &#8211; D\u00f9ng pad nylon m\u1ecbn ho\u1eb7c dao nh\u1ef1a c\u1ea1o d\u1ea7n; tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng d\u00f9ng len th\u00e9p.<br \/>\n&#8211; B\u01b0\u1edbc 3 \u2013 R\u1eeda v\u00e0 trung h\u00f2a:<br \/>\n  &#8211; X\u1ed1i n\u01b0\u1edbc s\u1ea1ch th\u1eadt k\u1ef9, lau kh\u00f4 ngay \u0111\u1ec3 tr\u00e1nh v\u1ec7t n\u01b0\u1edbc m\u1edbi.<br \/>\n&#8211; B\u01b0\u1edbc 4 \u2013 Tr\u01b0\u1eddng h\u1ee3p c\u1eb7n d\u00e0y, l\u00e2u n\u0103m:<br \/>\n  &#8211; D\u00f9ng ch\u1ea5t t\u1ea9y c\u1eb7n chuy\u00ean d\u1ee5ng g\u1ed1c phosphoric 10\u201315% ho\u1eb7c sulfamic 5\u201310% an to\u00e0n v\u1edbi inox. Tu\u00e2n th\u1ee7 h\u01b0\u1edbng d\u1eabn nh\u00e0 s\u1ea3n xu\u1ea5t, h\u1ea1n ch\u1ebf th\u1eddi gian ti\u1ebfp x\u00fac.<br \/>\n  &#8211; Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng d\u00f9ng HCl (axit clohydric) v\u00ec g\u00e2y r\u1ed7 (pitting) tr\u00ean inox.<br \/>\n&#8211; B\u01b0\u1edbc 5 \u2013 Ho\u00e0n thi\u1ec7n:<br \/>\n  &#8211; Lau l\u1ea1i b\u1eb1ng x\u00e0 ph\u00f2ng pH trung t\u00ednh, r\u1eeda \u2013 s\u1ea5y kh\u00f4.<\/p>\n<p>M\u1eb9o cho b\u1ed3n, \u1ed1ng, coil:<br \/>\n&#8211; Tu\u1ea7n ho\u00e0n (circulation cleaning) b\u1eb1ng dung d\u1ecbch citric 5% \u1edf 40\u201350\u00b0C trong 20\u201340 ph\u00fat, sau \u0111\u00f3 x\u1ea3 s\u1ea1ch nhi\u1ec1u l\u1ea7n. Ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch gio\u0103ng\/ph\u1ed1t tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n.<\/p>\n<p>Ph\u00f2ng ng\u1eeba:<br \/>\n&#8211; Lau kh\u00f4 sau m\u1ed7i l\u1ea7n s\u1eed d\u1ee5ng, \u0111\u1eb7c bi\u1ec7t \u1edf m\u00e9p, g\u00f3c, m\u1ed1i gh\u00e9p.<br \/>\n&#8211; L\u1eafp l\u1ecdc\/thi\u1ebft b\u1ecb l\u00e0m m\u1ec1m n\u1ebfu \u0111\u1ed9 c\u1ee9ng n\u01b0\u1edbc >120 mg\/L CaCO3.<br \/>\n[Ngu\u1ed3n: Nickel Institute \u2013 Cleaning; BSSA \u2013 Descaling Guidance]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Vet_chay_chay_khet_va_%E2%80%9Cheat_tint%E2%80%9D\"><\/span>3) V\u1ebft ch\u00e1y, ch\u00e1y kh\u00e9t v\u00e0 \u201cheat tint\u201d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>3.1 Ch\u00e1y kh\u00e9t th\u1ef1c ph\u1ea9m tr\u00ean n\u1ed3i\/ch\u1ea3o inox:<br \/>\n&#8211; B\u01b0\u1edbc 1 \u2013 Kh\u1eed d\u00ednh:<br \/>\n  &#8211; \u0110\u1ed5 n\u01b0\u1edbc n\u00f3ng ph\u1ee7 m\u1eb7t ch\u00e1y, th\u00eam v\u00e0i gi\u1ecdt n\u01b0\u1edbc r\u1eeda ch\u00e9n, ng\u00e2m 15\u201330 ph\u00fat. C\u1ea1o b\u1eb1ng spatula nh\u1ef1a.<br \/>\n&#8211; B\u01b0\u1edbc 2 \u2013 S\u00f4i nh\u1eb9 v\u1edbi ki\u1ec1m y\u1ebfu:<br \/>\n  &#8211; Th\u00eam 1\u20132 th\u00eca baking soda, \u0111un s\u00f4i nh\u1eb9 5\u201310 ph\u00fat; \u0111\u1ec3 ngu\u1ed9i, ch\u00e0 b\u1eb1ng pad nylon. R\u1eeda s\u1ea1ch.<br \/>\n&#8211; B\u01b0\u1edbc 3 \u2013 Oxy h\u00f3a nh\u1eb9 v\u1edbi H2O2 (t\u00f9y ch\u1ecdn):<br \/>\n  &#8211; V\u1edbi ch\u00e1y \u0111en c\u1ee9ng \u0111\u1ea7u: tr\u1ed9n H2O2 3% v\u1edbi baking soda th\u00e0nh h\u1ed3, b\u00f4i 10\u201315 ph\u00fat. Ch\u00e0 nh\u1eb9, r\u1eeda k\u1ef9.<br \/>\n&#8211; B\u01b0\u1edbc 4 \u2013 X\u1eed l\u00fd v\u1ec7t xanh t\u00edm (rainbow) do qu\u00e1 nhi\u1ec7t:<br \/>\n  &#8211; Lau v\u1edbi gi\u1ea5m 5\u20138% ho\u1eb7c ch\u1ea5t t\u1ea9y ch\u1ee9a axit oxalic\/citric, r\u1eeda s\u1ea1ch, lau kh\u00f4.<\/p>\n<p>3.2 Heat tint quanh v\u00f9ng h\u00e0n\/gia c\u00f4ng:<br \/>\n&#8211; M\u1ee9c nh\u1eb9 \u2013 c\u01a1 h\u1ecdc:<br \/>\n  &#8211; \u0110\u00e1nh b\u1eb1ng pad Scotch-Brite m\u1ecbn theo th\u1edb; t\u0103ng d\u1ea7n \u0111\u1ed9 h\u1ea1t n\u1ebfu c\u1ea7n. Lau s\u1ea1ch b\u1ee5i m\u00e0i.<br \/>\n&#8211; H\u00f3a h\u1ecdc \u2013 pickling\/passivation:<br \/>\n  &#8211; Gel\/kem pickling g\u1ed1c nitric + hydrofluoric (HF) lo\u1ea1i b\u1ecf oxit d\u00e0y v\u00e0 t\u00e1i th\u1ee5 \u0111\u1ed9ng r\u1ea5t hi\u1ec7u qu\u1ea3, nh\u01b0ng c\u1ef1c k\u1ef3 nguy hi\u1ec3m. Ch\u1ec9 \u0111\u1ec3 k\u1ef9 thu\u1eadt vi\u00ean \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o th\u1ef1c hi\u1ec7n, c\u00f3 PPE \u0111\u1ea7y \u0111\u1ee7, khay h\u1ee9ng, trung h\u00f2a \u2013 th\u1ea3i b\u1ecf \u0111\u00fang quy \u0111\u1ecbnh.<br \/>\n  &#8211; Thay th\u1ebf \u00edt nguy hi\u1ec3m h\u01a1n: ch\u1ea5t l\u00e0m s\u1ea1ch m\u1ed1i h\u00e0n g\u1ed1c citric\/nitric lo\u00e3ng ho\u1eb7c h\u1ec7 th\u1ed1ng l\u00e0m s\u1ea1ch \u0111i\u1ec7n ph\u00e2n (electrolytic weld cleaning). Sau x\u1eed l\u00fd, r\u1eeda \u2013 trung h\u00f2a \u2013 ki\u1ec3m tra.<br \/>\n&#8211; Chu\u1ea9n tham chi\u1ebfu: ASTM A380\/A967 h\u01b0\u1edbng d\u1eabn l\u00e0m s\u1ea1ch, t\u1ea9y g\u1ec9, th\u1ee5 \u0111\u1ed9ng b\u1ec1 m\u1eb7t sau gia c\u00f4ng.<\/p>\n<p>L\u01b0u \u00fd:<br \/>\n&#8211; Kh\u00f4ng d\u00f9ng b\u00e0n ch\u1ea3i th\u00e9p carbon. D\u1ee5ng c\u1ee5 ph\u1ea3i chuy\u00ean inox \u0111\u1ec3 tr\u00e1nh l\u00e2y nhi\u1ec5m s\u1eaft.<br \/>\n&#8211; B\u1ec1 m\u1eb7t trang tr\u00ed hairline c\u1ea7n ch\u00e0 c\u00f9ng h\u01b0\u1edbng th\u1edb \u0111\u1ec3 tr\u00e1nh \u201cv\u00e1\u201d loang.<\/p>\n<h2 id=\"toc-3-chon-hoa-chat-va-dung-cu-theo-cap-do-ban\"><span class=\"ez-toc-section\" id=\"Chon_hoa_chat_va_dung_cu_theo_cap_do_ban\"><\/span>Ch\u1ecdn h\u00f3a ch\u1ea5t v\u00e0 d\u1ee5ng c\u1ee5 theo c\u1ea5p \u0111\u1ed9 b\u1ea9n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Nh\u1eb9:<br \/>\n  &#8211; X\u00e0 ph\u00f2ng pH trung t\u00ednh, n\u01b0\u1edbc \u1ea5m; kh\u0103n microfiber; baking soda; gi\u1ea5m 5\u20138%; axit citric 5\u201310%.<br \/>\n&#8211; Trung b\u00ecnh:<br \/>\n  &#8211; Ch\u1ea5t t\u1ea9y c\u00f3 axit oxalic\/citric chuy\u00ean inox; descaler g\u1ed1c phosphoric\/sulfamic; pad nylon m\u1ecbn; spatula nh\u1ef1a.<br \/>\n&#8211; N\u1eb7ng:<br \/>\n  &#8211; \u0110\u00e1nh c\u01a1 h\u1ecdc c\u00f3 ki\u1ec3m so\u00e1t (Scotch-Brite, m\u00e0i h\u1ea1t m\u1ecbn); ch\u1ea5t l\u00e0m s\u1ea1ch m\u1ed1i h\u00e0n chuy\u00ean d\u1ee5ng; pickling\/passivation theo ASTM (k\u1ef9 thu\u1eadt vi\u00ean).<\/p>\n<p>Tuy\u1ec7t \u0111\u1ed1i tr\u00e1nh:<br \/>\n&#8211; Javel\/NaOCl, HCl, len th\u00e9p, b\u1ed9t m\u00e0i th\u00f4, mi\u1ebfng ch\u00e0 nh\u00e1m kim c\u01b0\u01a1ng tr\u00ean b\u1ec1 m\u1eb7t trang tr\u00ed.<\/p>\n<h2 id=\"toc-4-phong-ngua-tai-ban-va-toi-uu-do-ben\"><span class=\"ez-toc-section\" id=\"Phong_ngua_tai_ban_va_toi_uu_do_ben\"><\/span>Ph\u00f2ng ng\u1eeba t\u00e1i b\u1ea9n v\u00e0 t\u1ed1i \u01b0u \u0111\u1ed9 b\u1ec1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Thi\u1ebft k\u1ebf\/b\u1ed1 tr\u00ed: h\u1ea1n ch\u1ebf \u0111\u1ecdng n\u01b0\u1edbc, khe h\u1eb9p; \u0111\u1ea3m b\u1ea3o tho\u00e1t n\u01b0\u1edbc t\u1ed1t.<br \/>\n&#8211; V\u1eadt li\u1ec7u: ch\u1ecdn 304\/316 cho m\u00f4i tr\u01b0\u1eddng chloride, 2B\/b\u00f3ng g\u01b0\u01a1ng cho khu v\u1ef1c c\u1ea7n v\u1ec7 sinh nhanh.<br \/>\n&#8211; Quy tr\u00ecnh gia c\u00f4ng: kh\u00f4ng d\u00f9ng chung d\u1ee5ng c\u1ee5 v\u1edbi th\u00e9p carbon; l\u00e0m s\u1ea1ch sau h\u00e0n (c\u01a1 h\u1ecdc\/\u0111i\u1ec7n ph\u00e2n\/passivation).<br \/>\n&#8211; V\u1eadn h\u00e0nh\/b\u1ea3o d\u01b0\u1ee1ng:<br \/>\n  &#8211; L\u1ecbch v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3; r\u1eeda n\u01b0\u1edbc ng\u1ecdt sau khi ti\u1ebfp x\u00fac mu\u1ed1i\/h\u00f3a ch\u1ea5t h\u1ed3 b\u01a1i.<br \/>\n  &#8211; Lau kh\u00f4 sau v\u1ec7 sinh; ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7 m\u1ecfng \u0111\u1ecbnh k\u1ef3 \u1edf khu v\u1ef1c ngo\u00e0i tr\u1eddi\/bi\u1ec3n.<br \/>\n&#8211; N\u01b0\u1edbc c\u1ea5p: ki\u1ec3m so\u00e1t \u0111\u1ed9 c\u1ee9ng; x\u1ea3 n\u01b0\u1edbc n\u00f3ng \u0111\u1ec3 \u0111\u1ea9y nhanh kh\u00f4 m\u1eb7t.<\/p>\n<h2 id=\"toc-5-cau-hoi-thuong-gap\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; C\u00f3 n\u00ean d\u00f9ng Javel \u0111\u1ec3 t\u1ea9y tr\u1eafng inox? Kh\u00f4ng. Clo g\u00e2y r\u1ed7 v\u00e0 \u1ed1 v\u00e0ng tr\u1edf l\u1ea1i.<br \/>\n&#8211; Th\u1ea5y \u201cg\u1ec9 n\u00e2u\u201d tr\u00ean inox c\u00f3 ph\u1ea3i inox k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng? Kh\u00f4ng h\u1eb3n. Th\u01b0\u1eddng l\u00e0 t\u1ea1p s\u1eaft b\u00e1m b\u1ec1 m\u1eb7t ho\u1eb7c tea staining. V\u1ec7 sinh \u0111\u00fang c\u00e1ch v\u00e0 passivation s\u1ebd x\u1eed l\u00fd \u0111\u01b0\u1ee3c.<br \/>\n&#8211; D\u00f9ng WD-40\/d\u1ea7u m\u00e1y \u0111\u1ec3 b\u00f3ng b\u1ec1 m\u1eb7t? C\u00f3 th\u1ec3 b\u00f3ng t\u1ea1m th\u1eddi nh\u01b0ng d\u1ec5 h\u00fat b\u1ee5i. \u01afu ti\u00ean s\u00e1p vi tinh th\u1ec3\/d\u1ea7u b\u1ea3o d\u01b0\u1ee1ng chuy\u00ean inox, lau th\u1eadt m\u1ecfng.<br \/>\n&#8211; N\u01b0\u1edbc chanh c\u00f3 d\u00f9ng \u0111\u01b0\u1ee3c kh\u00f4ng? C\u00f3, l\u00e0 axit h\u1eefu c\u01a1 nh\u1eb9. R\u1eeda k\u1ef9 sau khi d\u00f9ng.<br \/>\n&#8211; Bao l\u00e2u n\u00ean passivation? Sau gia c\u00f4ng\/h\u00e0n m\u1edbi ho\u1eb7c khi b\u1ec1 m\u1eb7t t\u1eebng ti\u1ebfp x\u00fac m\u1ea1nh v\u1edbi chloride. D\u00f9ng s\u1ea3n ph\u1ea9m g\u1ed1c citric\/nitric theo ASTM A967.<\/p>\n<h2 id=\"toc-6-an-toan-va-moi-truong\"><span class=\"ez-toc-section\" id=\"An_toan_va_moi_truong\"><\/span>An to\u00e0n v\u00e0 m\u00f4i tr\u01b0\u1eddng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Kh\u00f4ng tr\u1ed9n axit v\u1edbi ch\u1ea5t t\u1ea9y ch\u1ee9a clo; kh\u00f4ng tr\u1ed9n h\u00f3a ch\u1ea5t l\u1eabn nhau.<br \/>\n&#8211; D\u00f9ng g\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t, k\u00ednh, kh\u1ea9u trang; l\u00e0m vi\u1ec7c n\u01a1i th\u00f4ng tho\u00e1ng.<br \/>\n&#8211; Thu gom \u2013 trung h\u00f2a dung d\u1ecbch th\u1ea3i theo h\u01b0\u1edbng d\u1eabn nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 quy \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng.<br \/>\n&#8211; HF v\u00e0 s\u1ea3n ph\u1ea9m ch\u1ee9a HF ch\u1ec9 d\u00f9ng b\u1edfi \u0111\u01a1n v\u1ecb chuy\u00ean nghi\u1ec7p, c\u00f3 quy tr\u00ecnh \u1ee9ng c\u1ee9u kh\u1ea9n c\u1ea5p.<\/p>\n<h2 id=\"toc-7-vi-du-thuc-te-tai-xuong\"><span class=\"ez-toc-section\" id=\"Vi_du_thuc_te_tai_xuong\"><\/span>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u00ecnh hu\u1ed1ng: B\u1ed3n inox 304 c\u00f3 c\u1eb7n canxi do n\u01b0\u1edbc gi\u1ebfng khoan.<br \/>\n&#8211; Quy tr\u00ecnh: Tu\u1ea7n ho\u00e0n citric 5% \u1edf 45\u00b0C trong 30 ph\u00fat \u2192 x\u1ea3 s\u1ea1ch 2\u20133 l\u1ea7n \u2192 lau kh\u00f4. C\u00e1c m\u1ea3ng d\u00e0y x\u1eed l\u00fd b\u1ed5 sung b\u1eb1ng descaler g\u1ed1c phosphoric 10% t\u1ea1i ch\u1ed7 5 ph\u00fat \u2192 r\u1eeda k\u1ef9.<br \/>\n&#8211; K\u1ebft qu\u1ea3: C\u1eb7n bong s\u1ea1ch, kh\u00f4ng x\u01b0\u1edbc, \u0111\u1ed9 b\u00f3ng ph\u1ee5c h\u1ed3i; kh\u00f4ng ghi nh\u1eadn r\u1ed7 sau 4 tu\u1ea7n v\u1eadn h\u00e0nh.<\/p>\n<h2 id=\"toc-8-nguon-tham-khao\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao\"><\/span>Ngu\u1ed3n tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Nickel Institute \u2013 Care and Cleaning of Stainless Steel: https:\/\/nickelinstitute.org<br \/>\n&#8211; ASSDA (Australian Stainless Steel Development Association) \u2013 Preventing Tea Staining: https:\/\/assda.asn.au<br \/>\n&#8211; BSSA (British Stainless Steel Association) \u2013 Cleaning and Descaling: https:\/\/bssa.org.uk<br \/>\n&#8211; ASTM A380\/A967 \u2013 Cleaning, Descaling and Passivation of Stainless Steel Parts<\/p>\n<p>K\u1ebft lu\u1eadn<br \/>\n&#8211; \u1ed0 v\u00e0ng: \u01b0u ti\u00ean axit h\u1eefu c\u01a1 nh\u1eb9 (citric\/oxalic), lo\u1ea1i b\u1ecf t\u1ea1p s\u1eaft, r\u1eeda \u2013 lau kh\u00f4, c\u00f3 th\u1ec3 passivation.<br \/>\n&#8211; C\u1eb7n canxi: gi\u1ea5m\/citric l\u00e0nh t\u00ednh; tr\u01b0\u1eddng h\u1ee3p n\u1eb7ng d\u00f9ng phosphoric\/sulfamic, tuy\u1ec7t \u0111\u1ed1i tr\u00e1nh HCl; lu\u00f4n r\u1eeda k\u1ef9 v\u00e0 s\u1ea5y kh\u00f4.<br \/>\n&#8211; V\u1ebft ch\u00e1y: v\u1edbi d\u1ee5ng c\u1ee5 b\u1ebfp d\u00f9ng n\u01b0\u1edbc n\u00f3ng + baking soda\/H2O2 3%; heat tint quanh m\u1ed1i h\u00e0n c\u1ea7n \u0111\u00e1nh c\u01a1 ho\u1eb7c l\u00e0m s\u1ea1ch\/h\u00f3a th\u1ee5 \u0111\u1ed9ng \u0111\u00fang chu\u1ea9n.<br \/>\nTu\u00e2n th\u1ee7 nguy\u00ean t\u1eafc t\u1eeb nh\u1eb9 \u0111\u1ebfn m\u1ea1nh, ch\u1ecdn \u0111\u00fang h\u00f3a ch\u1ea5t \u2013 d\u1ee5ng c\u1ee5 v\u00e0 ki\u1ec3m so\u00e1t th\u1eddi gian ti\u1ebfp x\u00fac s\u1ebd gi\u00fap ph\u1ee5c h\u1ed3i b\u1ec1 m\u1eb7t inox an to\u00e0n, b\u1ec1n \u0111\u1eb9p v\u00e0 h\u1ea1n ch\u1ebf t\u00e1i b\u1ea9n.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n quy tr\u00ecnh ph\u00f9 h\u1ee3p v\u1eadt li\u1ec7u 201\/304\/316, ho\u1eb7c d\u1ecbch v\u1ee5 l\u00e0m s\u1ea1ch \u2013 passivation t\u1ea1i c\u00f4ng tr\u00ecnh? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t. Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc x\u1eed l\u00fd \u1ed1 v\u00e0ng, c\u1eb7n canxi, v\u1ebft ch\u00e1y tr\u00ean inox 201\/304\/316. Ch\u1ecdn h\u00f3a ch\u1ea5t \u0111\u00fang, kh\u00f4ng tr\u1ea7y x\u01b0\u1edbc, an to\u00e0n v\u00e0 ph\u00f2ng ng\u1eeba t\u00e1i b\u1ea9n.<\/p>\n","protected":false},"author":7,"featured_media":1018,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2458","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\/2458","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=2458"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2458\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1018"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}