{"id":1599,"date":"2026-01-26T12:34:22","date_gmt":"2026-01-26T05:34:22","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/tai-sao-inox-316-bat-buoc-cho-du-an-xay-dung-ven-bien\/"},"modified":"2026-01-26T12:34:22","modified_gmt":"2026-01-26T05:34:22","slug":"tai-sao-inox-316-bat-buoc-cho-du-an-xay-dung-ven-bien","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/tai-sao-inox-316-bat-buoc-cho-du-an-xay-dung-ven-bien\/","title":{"rendered":"T\u1ea1i sao Inox 316 b\u1eaft bu\u1ed9c cho d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng ven bi\u1ec3n?"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-vi-sao-bien-an-inox-nhanh-ban-chat-moi-truong-ven-\">V\u00ec sao bi\u1ec3n \u201c\u0103n\u201d inox nhanh? B\u1ea3n ch\u1ea5t m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n<\/a><\/li>\n<li><a href=\"#toc-1-thanh-phan-va-co-che-chong-an-mon-vuot-troi-cua-in\">Th\u00e0nh ph\u1ea7n v\u00e0 c\u01a1 ch\u1ebf ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a Inox 316<\/a><\/li>\n<li><a href=\"#toc-2-khi-nao-inox-316-la-bat-buoc-huong-dan-theo-khoang\">Khi n\u00e0o Inox 316 l\u00e0 b\u1eaft bu\u1ed9c? H\u01b0\u1edbng d\u1eabn theo kho\u1ea3ng c\u00e1ch v\u00e0 m\u1ee9c ph\u01a1i nhi\u1ec5m<\/a><\/li>\n<li><a href=\"#toc-3-hoan-thien-be-mat-chi-tiet-thiet-ke-va-thi-cong-de\">Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t, chi ti\u1ebft thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u1ec3 316 ph\u00e1t huy t\u1ed1i \u0111a<\/a><\/li>\n<li><a href=\"#toc-4-thong-so-ky-thuat-nen-ghi-ro-trong-ho-so-moi-thaub\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00ean ghi r\u00f5 trong h\u1ed3 s\u01a1 m\u1eddi th\u1ea7u\/b\u1ea3n v\u1ebd<\/a><\/li>\n<li><a href=\"#toc-5-du-lieu-co-tinh-tham-khao-va-gioi-han-ung-dung\">D\u1eef li\u1ec7u c\u01a1 t\u00ednh tham kh\u1ea3o v\u00e0 gi\u1edbi h\u1ea1n \u1ee9ng d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-6-bai-toan-chi-phi-vong-doi-316-co-thuc-su-re-hon\">B\u00e0i to\u00e1n chi ph\u00ed v\u00f2ng \u0111\u1eddi: 316 c\u00f3 th\u1ef1c s\u1ef1 \u201cr\u1ebb\u201d h\u01a1n?<\/a><\/li>\n<li><a href=\"#toc-7-ung-dung-316-tieu-bieu-o-ven-bien\">\u1ee8ng d\u1ee5ng 316 ti\u00eau bi\u1ec3u \u1edf ven bi\u1ec3n<\/a><\/li>\n<li><a href=\"#toc-8-cau-hoi-thuong-gap-faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong c\u00e1c c\u00f4ng tr\u00ecnh g\u1ea7n bi\u1ec3n, s\u01b0\u01a1ng mu\u1ed1i v\u00e0 ion chloride t\u1ea5n c\u00f4ng d\u1eef d\u1ed9i l\u1edbp th\u1ee5 \u0111\u1ed9ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9. \u0110\u00e2y l\u00e0 b\u1ed1i c\u1ea3nh \u0111i\u1ec3n h\u00ecnh m\u00e0 Inox 316 ch\u1ee9ng minh \u01b0u th\u1ebf tuy\u1ec7t \u0111\u1ed1i so v\u1edbi 304 nh\u1edd c\u00f3 molypden (Mo) gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u0111i\u1ec3m (pitting) v\u00e0 \u0103n m\u00f2n k\u1ebd h\u1edf. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch r\u00f5 v\u00ec sao 316 l\u00e0 l\u1ef1a ch\u1ecdn b\u1eaft bu\u1ed9c cho c\u00f4ng tr\u00ecnh ven bi\u1ec3n, k\u00e8m khuy\u1ebfn ngh\u1ecb k\u1ef9 thu\u1eadt v\u1ec1 v\u1eadt li\u1ec7u, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t, thi c\u00f4ng, ti\u00eau chu\u1ea9n v\u00e0 b\u1ea3o tr\u00ec.<\/p>\n<h2 id=\"toc-0-vi-sao-bien-an-inox-nhanh-ban-chat-moi-truong-ven-\">V\u00ec sao bi\u1ec3n \u201c\u0103n\u201d inox nhanh? B\u1ea3n ch\u1ea5t m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n<\/h2>\n<p>&#8211; H\u01a1i n\u01b0\u1edbc m\u1eb7n, phun s\u01b0\u01a1ng mu\u1ed1i v\u00e0 l\u1eafng \u0111\u1ecdng mu\u1ed1i: h\u1ea1t mu\u1ed1i (NaCl, MgCl2) b\u00e1m b\u1ec1 m\u1eb7t, t\u1ea1o m\u00e0ng \u1ea9m li\u00ean t\u1ee5c th\u00fac \u0111\u1ea9y \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; \u0102n m\u00f2n \u0111i\u1ec3m (pitting) v\u00e0 k\u1ebd h\u1edf (crevice): ion Cl- xuy\u00ean ph\u00e1 l\u1edbp oxit Cr2O3, t\u1ea1o l\u1ed7 r\u1ed7 t\u1eadp trung; k\u1ebd h\u1edf t\u1ea1i m\u1ed1i gh\u00e9p, gio\u0103ng, th\u1eadm ch\u00ed d\u01b0\u1edbi bavia m\u00e0i.<br \/>\n&#8211; \u0102n m\u00f2n do \u1ee9ng su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng chloride (SCC): \u1edf nhi\u1ec7t \u0111\u1ed9 cao, t\u1ea3i k\u00e9o v\u00e0 ion Cl-, austenitic nh\u01b0 304\/316 c\u00f3 nguy c\u01a1 n\u1ee9t SCC; 316 kh\u00e1ng pitting t\u1ed1t h\u01a1n 304 nh\u01b0ng SCC v\u1eabn c\u1ea7n ki\u1ec3m so\u00e1t thi\u1ebft k\u1ebf, nhi\u1ec7t v\u00e0 \u1ee9ng su\u1ea5t.<br \/>\n&#8211; Ph\u00e2n lo\u1ea1i kh\u00ed quy\u1ec3n theo ISO 9223: v\u00f9ng ven bi\u1ec3n th\u01b0\u1eddng r\u01a1i v\u00e0o C4\u2013C5 (cao \u0111\u1ebfn r\u1ea5t cao) v\u1ec1 \u0103n m\u00f2n do mu\u1ed1i v\u00e0 \u0111\u1ed9 \u1ea9m.<\/p>\n<p>K\u1ebft lu\u1eadn: n\u1ebfu d\u00f9ng m\u00e1c kh\u00f4ng ph\u00f9 h\u1ee3p (nh\u01b0 304), b\u1ec1 m\u1eb7t s\u1ebd nhanh r\u1ed7, \u1ed1 n\u00e2u (tea staining), gi\u1ea3m \u0111\u1ed9 b\u1ec1n, t\u0103ng chi ph\u00ed v\u1ec7 sinh, s\u1eeda ch\u1eefa, th\u1eadm ch\u00ed ph\u1ea3i thay th\u1ebf s\u1edbm.<\/p>\n<h2 id=\"toc-1-thanh-phan-va-co-che-chong-an-mon-vuot-troi-cua-in\">Th\u00e0nh ph\u1ea7n v\u00e0 c\u01a1 ch\u1ebf ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a Inox 316<\/h2>\n<p>&#8211; H\u00f3a h\u1ecdc \u0111i\u1ec3n h\u00ecnh 316\/316L: 16\u201318% Cr, 10\u201314% Ni, 2.0\u20133.0% Mo; 316L c\u00f3 C \u2264 0,03% gi\u00fap ch\u1ed1ng nh\u1ea1y c\u1ea3m h\u1ea1t (intergranular) khi h\u00e0n.<br \/>\n&#8211; Mo l\u00e0 \u201cch\u00eca kh\u00f3a\u201d: t\u0103ng kh\u1ea3 n\u0103ng t\u00e1i th\u1ee5 \u0111\u1ed9ng t\u1ea1i v\u00f9ng b\u1ecb Cl- t\u1ea5n c\u00f4ng, n\u00e2ng s\u1ee9c kh\u00e1ng pitting\/k\u1ebd h\u1edf.<br \/>\n&#8211; Ch\u1ec9 s\u1ed1 PREN (Pitting Resistance Equivalent Number) \u01b0\u1edbc l\u01b0\u1ee3ng s\u1ee9c kh\u00e1ng r\u1ed7:<br \/>\n  + 304 (18Cr-8Ni-0Mo): PREN \u2248 18\u201319<br \/>\n  + 316 (17Cr-10Ni-2.1Mo): PREN \u2248 24<br \/>\n  + Duplex 2205 (22Cr-5\u20136Ni-3Mo-0.15N): PREN \u2248 34\u201335<br \/>\nPREN c\u00e0ng cao, kh\u00e1ng r\u1ed7 c\u00e0ng t\u1ed1t; 316 v\u01b0\u1ee3t 304 m\u1ed9t b\u1eadc quan tr\u1ecdng trong m\u00f4i tr\u01b0\u1eddng chloride.<\/p>\n<h3>316, 316L, 316Ti: ch\u1ecdn m\u00e1c n\u00e0o?<\/h3>\n<p>&#8211; 316L: \u01b0u ti\u00ean cho h\u1ea7u h\u1ebft c\u1ea5u ki\u1ec7n h\u00e0n \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n li\u00ean h\u1ea1t; l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh ngo\u00e0i tr\u1eddi.<br \/>\n&#8211; 316Ti: c\u00f3 Ti \u1ed5n \u0111\u1ecbnh cacbua, d\u00f9ng khi ph\u1ea3i h\u00e0n d\u00e0y\/nhi\u1ec7t cao m\u00e0 v\u1eabn c\u1ea7n c\u01a1 t\u00ednh cao; \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n 316L t\u1ea1i VN.<br \/>\n&#8211; 316 (kh\u00f4ng L): ph\u00f9 h\u1ee3p chi ti\u1ebft gia c\u00f4ng ngu\u1ed9i m\u1ecfng, kh\u00f4ng h\u00e0n ho\u1eb7c nhi\u1ec7t th\u1ea5p.<\/p>\n<h3>So s\u00e1nh nhanh 304 vs 316 vs 2205<\/h3>\n<p>&#8211; 304: d\u00f9ng trong \u0111\u00f4 th\u1ecb n\u1ed9i \u0111\u1ecba kh\u00f4 r\u00e1o; ven bi\u1ec3n d\u1ec5 r\u1ed7\/\u1ed1 n\u00e2u d\u00f9 \u0111\u01b0\u1ee3c v\u1ec7 sinh.<br \/>\n&#8211; 316\/316L: ti\u00eau chu\u1ea9n cho ven bi\u1ec3n kh\u00ed quy\u1ec3n, lan can, \u1ed1p m\u1eb7t \u0111\u1ee9ng, bu l\u00f4ng; c\u00e2n b\u1eb1ng t\u1ed1t gi\u1eefa chi ph\u00ed v\u00e0 \u0111\u1ed9 b\u1ec1n.<br \/>\n&#8211; Duplex 2205: v\u00f9ng phun s\u00f3ng tr\u1ef1c ti\u1ebfp, k\u1ebft c\u1ea5u b\u1ebfn c\u1ea3ng, b\u1ec3 n\u01b0\u1edbc m\u1eb7n, ho\u1eb7c t\u1ea3i tr\u1ecdng cao + chloride \u0111\u1eadm \u0111\u1eb7c; chi ph\u00ed cao h\u01a1n nh\u01b0ng tu\u1ed5i th\u1ecd v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n<h2 id=\"toc-2-khi-nao-inox-316-la-bat-buoc-huong-dan-theo-khoang\">Khi n\u00e0o Inox 316 l\u00e0 b\u1eaft bu\u1ed9c? H\u01b0\u1edbng d\u1eabn theo kho\u1ea3ng c\u00e1ch v\u00e0 m\u1ee9c ph\u01a1i nhi\u1ec5m<\/h2>\n<p>&#8211; Trong v\u00f2ng 0\u20131 km t\u1eeb m\u00e9p n\u01b0\u1edbc bi\u1ec3n (splash\/spray zone): 316 t\u1ed1i thi\u1ec3u cho h\u1ea1ng m\u1ee5c ki\u1ebfn tr\u00fac; c\u00e2n nh\u1eafc 2205 cho k\u1ebft c\u1ea5u, bu l\u00f4ng ch\u1ecbu t\u1ea3i, chi ti\u1ebft kh\u00f3 v\u1ec7 sinh.<br \/>\n&#8211; 1\u20135 km: 316\/316L l\u00e0 l\u1ef1a ch\u1ecdn chu\u1ea9n cho ngo\u1ea1i th\u1ea5t (lan can, m\u1eb7t d\u1ef1ng, m\u00e1i che, v\u00edt\/bu l\u00f4ng). 304 ch\u1ec9 c\u00e2n nh\u1eafc cho n\u1ed9i th\u1ea5t k\u00edn gi\u00f3, \u00edt l\u1eafng mu\u1ed1i v\u00e0 \u0111\u01b0\u1ee3c v\u1ec7 sinh nghi\u00eam ng\u1eb7t.<br \/>\n&#8211; >5 km nh\u01b0ng gi\u00f3 bi\u1ec3n m\u1ea1nh\/\u0111\u01b0\u1eddng gi\u00f3 tr\u1ed1ng: v\u1eabn n\u00ean d\u00f9ng 316 cho ngo\u1ea1i th\u1ea5t \u0111\u1ec3 tr\u00e1nh \u1ed1 n\u00e2u.<br \/>\n&#8211; Ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp n\u01b0\u1edbc bi\u1ec3n\/\u1ea9m chloride \u0111\u1eadm \u0111\u1eb7c (nh\u00e0 m\u00e1y mu\u1ed1i, x\u1eed l\u00fd n\u01b0\u1edbc bi\u1ec3n): 316 c\u00f3 th\u1ec3 ch\u01b0a \u0111\u1ee7; c\u00e2n nh\u1eafc 2205, 904L ho\u1eb7c si\u00eau austenitic theo t\u01b0 v\u1ea5n k\u1ef9 thu\u1eadt.<\/p>\n<p>L\u01b0u \u00fd: gi\u00f3 m\u00f9a, b\u00e3o, h\u01b0\u1edbng nh\u00e0, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t v\u00e0 t\u1ea7n su\u1ea5t v\u1ec7 sinh c\u00f3 th\u1ec3 khi\u1ebfn c\u00f4ng tr\u00ecnh c\u00e1ch bi\u1ec3n 3\u20134 km v\u1eabn c\u1ea7n 316.<\/p>\n<h2 id=\"toc-3-hoan-thien-be-mat-chi-tiet-thiet-ke-va-thi-cong-de\">Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t, chi ti\u1ebft thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u1ec3 316 ph\u00e1t huy t\u1ed1i \u0111a<\/h2>\n<h3>Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t (surface finish)<\/h3>\n<p>&#8211; \u0110\u1ed9 nh\u00e1m th\u1ea5p (Ra \u2264 0,5 \u00b5m) gi\u00fap gi\u1ea3m b\u00e1m mu\u1ed1i; b\u1ec1 m\u1eb7t b\u00f3ng g\u01b0\u01a1ng (No.8\/BA) kh\u00e1ng \u1ed1 t\u1ed1t nh\u1ea5t.<br \/>\n&#8211; X\u01b0\u1edbc hairline\/No.4 \u0111\u1eb9p nh\u01b0ng \u201cgi\u1eef mu\u1ed1i\u201d h\u01a1n; n\u1ebfu d\u00f9ng, c\u1ea7n v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 nghi\u00eam ng\u1eb7t.<br \/>\n&#8211; Tr\u00e1nh d\u00ednh s\u1eaft t\u1ef1 do: c\u1ea5m d\u00f9ng b\u00e0n ch\u1ea3i th\u00e9p carbon; b\u1ea3o qu\u1ea3n tr\u00e1nh nhi\u1ec5m b\u1ea9n ch\u00e9o trong x\u01b0\u1edfng.<\/p>\n<h3>Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf v\u00e0 \u0111\u1ecdng n\u01b0\u1edbc<\/h3>\n<p>&#8211; Tr\u00e1nh khe h\u1eb9p, g\u00f3c ch\u1ebft, ch\u1ed3ng m\u00ed k\u00edn; \u01b0u ti\u00ean tho\u00e1t n\u01b0\u1edbc t\u1ed1t, bo m\u00e9p, \u0111\u1ed9 d\u1ed1c b\u1ec1 m\u1eb7t \u2265 3\u00b0.<br \/>\n&#8211; H\u1ea1n ch\u1ebf b\u1ecbt k\u00edn t\u1ea1o k\u1ebd h\u1edf b\u1eb1ng silicone \u1edf ngo\u00e0i tr\u1eddi; n\u1ebfu c\u1ea7n, d\u00f9ng gio\u0103ng ph\u00f9 h\u1ee3p v\u00e0 thi\u1ebft k\u1ebf tho\u00e1ng.<\/p>\n<h3>H\u00e0n, t\u1ea9y g\u1ec9 (pickling) v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a (passivation)<\/h3>\n<p>&#8211; D\u00f9ng v\u1eadt li\u1ec7u h\u00e0n ph\u00f9 h\u1ee3p (ER\/E309L\/316L t\u00f9y li\u00ean k\u1ebft), \u01b0u ti\u00ean 316L.<br \/>\n&#8211; Sau h\u00e0n: t\u1ea9y g\u1ec9 b\u1eb1ng gel axit nitric\/citric chuy\u00ean d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf m\u00e0u nhi\u1ec7t v\u00e0 t\u00e1i t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng; r\u1eeda s\u1ea1ch k\u1ef9.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ea7u cu\u1ed1i cao d\u1ec5 SCC: ki\u1ec3m so\u00e1t quy tr\u00ecnh, l\u00e0m m\u00e1t gi\u1eefa pass.<\/p>\n<h3>\u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a (galvanic)<\/h3>\n<p>&#8211; Tr\u00e1nh gh\u00e9p 316 v\u1edbi kim lo\u1ea1i k\u00e9m h\u01a1n (th\u00e9p carbon, nh\u00f4m, k\u1ebdm) trong m\u00f4i tr\u01b0\u1eddng \u1ea9m mu\u1ed1i.<br \/>\n&#8211; N\u1ebfu bu\u1ed9c ph\u1ea3i gh\u00e9p: d\u00f9ng \u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n, v\u00f2ng \u0111\u1ec7m nylon\/PTFE, s\u01a1n c\u00e1ch \u0111i\u1ec7n; \u01b0u ti\u00ean fastener c\u00f9ng c\u1ea5p ho\u1eb7c cao h\u01a1n.<\/p>\n<h3>Bu l\u00f4ng\/\u1ed1c v\u00edt<\/h3>\n<p>&#8211; D\u00f9ng theo ISO 3506: A4-70\/A4-80 (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 316) cho ven bi\u1ec3n; tr\u00e1nh d\u00f9ng A2 (304) tr\u00ean n\u1ec1n 316 v\u00ec fastener s\u1ebd h\u1ecfng tr\u01b0\u1edbc.<br \/>\n&#8211; B\u00f4i tr\u01a1n ch\u1ed1ng k\u1eb9t ren (anti-seize) g\u1ed1c MoS2\/ceramic \u0111\u1ec3 tr\u00e1nh seizing.<\/p>\n<h3>V\u1ec7 sinh b\u1ea3o tr\u00ec<\/h3>\n<p>&#8211; R\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3: 2\u20134 tu\u1ea7n\/l\u1ea7n trong 0\u20131 km; 1\u20132 th\u00e1ng\/l\u1ea7n trong 1\u20135 km; d\u00f9ng ch\u1ea5t t\u1ea9y trung t\u00ednh pH 6\u20138, kh\u0103n m\u1ec1m.<br \/>\n&#8211; Kh\u00f4ng d\u00f9ng t\u1ea9y clo (Javen) n\u1ed3ng \u0111\u1ed9 cao; n\u1ebfu bu\u1ed9c d\u00f9ng, r\u1eeda x\u1ea3 th\u1eadt k\u1ef9.<\/p>\n<h2 id=\"toc-4-thong-so-ky-thuat-nen-ghi-ro-trong-ho-so-moi-thaub\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00ean ghi r\u00f5 trong h\u1ed3 s\u01a1 m\u1eddi th\u1ea7u\/b\u1ea3n v\u1ebd<\/h2>\n<p>&#8211; V\u1eadt li\u1ec7u: \u201cStainless steel 316L, ASTM A240 (t\u1ea5m), ASTM A312 (\u1ed1ng), ASTM A276 (thanh) ho\u1eb7c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng EN 1.4404.\u201d<br \/>\n&#8211; Fastener: \u201cISO 3506 A4-70 ho\u1eb7c A4-80; long \u0111\u1ec1n\/\u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n t\u1ea1i m\u1ed1i gh\u00e9p d\u1ecb kim.\u201d<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n: \u201cB\u1ec1 m\u1eb7t No.8\/BA ho\u1eb7c No.4 Ra \u2264 0,5 \u00b5m cho ngo\u1ea1i th\u1ea5t ven bi\u1ec3n.\u201d<br \/>\n&#8211; Quy tr\u00ecnh sau gia c\u00f4ng: \u201cPickling + passivation theo ASTM A380\/A967; ki\u1ec3m so\u00e1t nhi\u1ec5m s\u1eaft t\u1ef1 do.\u201d<br \/>\n&#8211; Ki\u1ec3m tra: \u201cKi\u1ec3m tra s\u1eaft t\u1ef1 do (ferroxyl), ki\u1ec3m tra mu\u1ed1i b\u1ec1 m\u1eb7t (Bresle) khi c\u1ea7n; kh\u00f4ng s\u1eed d\u1ee5ng ch\u1ec9 ti\u00eau phun s\u01b0\u01a1ng mu\u1ed1i (ASTM B117) nh\u01b0 th\u01b0\u1edbc \u0111o duy nh\u1ea5t cho inox.\u201d<\/p>\n<h2 id=\"toc-5-du-lieu-co-tinh-tham-khao-va-gioi-han-ung-dung\">D\u1eef li\u1ec7u c\u01a1 t\u00ednh tham kh\u1ea3o v\u00e0 gi\u1edbi h\u1ea1n \u1ee9ng d\u1ee5ng<\/h2>\n<p>&#8211; 316\/316L \u0111i\u1ec3n h\u00ecnh: Rp0.2 \u2248 205 MPa, Rm \u2248 515 MPa, d\u00e3n d\u00e0i \u2248 40%; nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c t\u1edbi ~600\u00b0C (kh\u1ea3 n\u0103ng SCC t\u0103ng khi >50\u201360\u00b0C trong m\u00f4i tr\u01b0\u1eddng chloride \u1ea9m).<br \/>\n&#8211; N\u1ebfu y\u00eau c\u1ea7u t\u1ea3i tr\u1ecdng cao trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n kh\u1eafc nghi\u1ec7t, duplex 2205 (Rp0.2 \u2248 450 MPa) l\u00e0 \u1ee9ng vi\u00ean thay th\u1ebf.<\/p>\n<h2 id=\"toc-6-bai-toan-chi-phi-vong-doi-316-co-thuc-su-re-hon\">B\u00e0i to\u00e1n chi ph\u00ed v\u00f2ng \u0111\u1eddi: 316 c\u00f3 th\u1ef1c s\u1ef1 \u201cr\u1ebb\u201d h\u01a1n?<\/h2>\n<p>V\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh lan can ngo\u00e0i tr\u1eddi c\u00e1ch bi\u1ec3n 1 km, tu\u1ed5i th\u1ecd m\u1ee5c ti\u00eau 25 n\u0103m:<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n 304: chi ph\u00ed mua th\u1ea5p h\u01a1n ~10\u201320% nh\u01b0ng c\u1ea7n v\u1ec7 sinh d\u00e0y \u0111\u1eb7c; nguy c\u01a1 r\u1ed7\/\u1ed1 n\u00e2u sau 1\u20133 n\u0103m, s\u1eeda ch\u1eefa\/ph\u1ee7 l\u1ea1i b\u1ec1 m\u1eb7t, th\u1eadm ch\u00ed thay sau 8\u201312 n\u0103m. T\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi c\u00f3 th\u1ec3 cao h\u01a1n 20\u201340%.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n 316L: \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u cao h\u01a1n, nh\u01b0ng v\u1edbi v\u1ec7 sinh \u0111\u00fang t\u1ea7n su\u1ea5t, b\u1ec1 m\u1eb7t \u1ed5n \u0111\u1ecbnh, \u00edt thay th\u1ebf; t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p h\u01a1n, r\u1ee7i ro th\u1ea9m m\u1ef9 v\u00e0 an to\u00e0n th\u1ea5p.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n 2205: cao nh\u1ea5t ban \u0111\u1ea7u, h\u1ee3p l\u00fd khi phun s\u00f3ng, t\u1ea3i tr\u1ecdng l\u1edbn, y\u00eau c\u1ea7u tu\u1ed5i th\u1ecd >30 n\u0103m g\u1ea7n bi\u1ec3n.<\/p>\n<h2 id=\"toc-7-ung-dung-316-tieu-bieu-o-ven-bien\">\u1ee8ng d\u1ee5ng 316 ti\u00eau bi\u1ec3u \u1edf ven bi\u1ec3n<\/h2>\n<p>&#8211; Lan can, tay v\u1ecbn, thang, gi\u00e0n gi\u00e1o ki\u1ebfn tr\u00fac, \u1ed1p m\u1eb7t d\u1ef1ng, lam che n\u1eafng.<br \/>\n&#8211; H\u1ec7 m\u00e1i, m\u00e1ng x\u1ed1i, neo m\u00e1i, ph\u1ee5 ki\u1ec7n k\u00ednh, ch\u1ed1t gi\u1eb1ng.<br \/>\n&#8211; Bu l\u00f4ng ch\u00e2n c\u1ed9t, b\u1ea3n m\u00e3 ngo\u00e0i tr\u1eddi, k\u1eb9p \u1ed1ng HVAC, h\u1ed9p \u0111\u1ea5u n\u1ed1i \u0111i\u1ec7n.<br \/>\n&#8211; Thi\u1ebft b\u1ecb khu v\u1ef1c b\u1ebfn du thuy\u1ec1n, c\u00f4ng vi\u00ean ven bi\u1ec3n, c\u1ea7u \u0111i b\u1ed9.<\/p>\n<h2 id=\"toc-8-cau-hoi-thuong-gap-faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<p>&#8211; 316 hay 316L cho ven bi\u1ec3n? 316L l\u00e0 m\u1eb7c \u0111\u1ecbnh n\u1ebfu c\u00f3 h\u00e0n. V\u1edbi chi ti\u1ebft kh\u00f4ng h\u00e0n, 316 th\u01b0\u1eddng v\u1eabn d\u00f9ng t\u1ed1t nh\u01b0ng 316L gi\u00fap an t\u00e2m.<br \/>\n&#8211; 316 c\u00f3 ch\u1ecbu \u0111\u01b0\u1ee3c n\u01b0\u1edbc bi\u1ec3n tr\u1ef1c ti\u1ebfp? Ch\u1ecbu t\u1ed1t h\u01a1n 304 trong n\u01b0\u1edbc bi\u1ec3n, nh\u01b0ng \u1edf v\u00f9ng phun\/\u0111\u1ecdng mu\u1ed1i li\u00ean t\u1ee5c ho\u1eb7c khe h\u1edf, 316 v\u1eabn c\u00f3 nguy c\u01a1 r\u1ed7; c\u00e2n nh\u1eafc 2205\/si\u00eau austenitic cho ti\u1ebfp x\u00fac li\u00ean t\u1ee5c.<br \/>\n&#8211; B\u1ec1 m\u1eb7t x\u01b0\u1edbc c\u00f3 d\u00f9ng \u0111\u01b0\u1ee3c ngo\u00e0i bi\u1ec3n? D\u00f9ng \u0111\u01b0\u1ee3c n\u1ebfu v\u1ec7 sinh nghi\u00eam ng\u1eb7t; tuy nhi\u00ean b\u00f3ng g\u01b0\u01a1ng\/BA kh\u00e1ng b\u00e1m mu\u1ed1i t\u1ed1t h\u01a1n.<br \/>\n&#8211; C\u00f3 c\u1ea7n s\u01a1n ph\u1ee7 l\u00ean 316? Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng. S\u01a1n c\u00f3 th\u1ec3 t\u1ea1o k\u1ebd h\u1edf n\u1ebfu bong tr\u00f3c. T\u1eadp trung v\u00e0o ch\u1ecdn m\u00e1c, ho\u00e0n thi\u1ec7n v\u00e0 v\u1ec7 sinh \u0111\u00fang.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/h2>\n<p>&#8211; Nickel Institute \u2013 Stainless steels in architecture, marine atmospheres; PREN kh\u00e1i ni\u1ec7m v\u00e0 khuy\u1ebfn ngh\u1ecb: https:\/\/www.nickelinstitute.org<br \/>\n&#8211; IMOA (International Molybdenum Association) \u2013 The benefits of molybdenum in stainless steel, h\u01b0\u1edbng d\u1eabn m\u00f4i tr\u01b0\u1eddng chloride: https:\/\/www.imoa.info<br \/>\n&#8211; ASSDA \u2013 Australian Stainless Steel Development Association, h\u01b0\u1edbng d\u1eabn \u201cTea Staining\u201d, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 v\u1ec7 sinh: https:\/\/www.assda.asn.au<br \/>\n&#8211; Outokumpu Datasheets \u2013 1.4401\/1.4404 (316\/316L), 1.4462 (2205): https:\/\/www.outokumpu.com<br \/>\n&#8211; ISO 9223: Corrosion of metals and alloys \u2013 Corrosivity of atmospheres<br \/>\n&#8211; ASTM A240\/A312\/A276, ASTM A380\/A967 \u2013 t\u1ea5m\/\u1ed1ng\/thanh inox v\u00e0 quy tr\u00ecnh l\u00e0m s\u1ea1ch, th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/p>\n<p>K\u1ebft lu\u1eadn<br \/>\nInox 316 (\u0111\u1eb7c bi\u1ec7t 316L) l\u00e0 ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c cho c\u00f4ng tr\u00ecnh ven bi\u1ec3n v\u00ec v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 kh\u00e1ng \u0103n m\u00f2n chloride, gi\u1ea3m r\u1ee7i ro r\u1ed7\/k\u1ebd h\u1edf, h\u1ea1 chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 duy tr\u00ec th\u1ea9m m\u1ef9 \u2013 \u0111\u1ed9 b\u1ec1n. \u0110\u1ec3 316 ph\u00e1t huy t\u1ed1i \u0111a, c\u1ea7n: ch\u1ecdn \u0111\u00fang m\u00e1c\/ti\u00eau chu\u1ea9n, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t m\u1ecbn, thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc \u2013 tr\u00e1nh k\u1ebd h\u1edf, ki\u1ec3m so\u00e1t h\u00e0n v\u00e0 l\u00e0m s\u1ea1ch th\u1ee5 \u0111\u1ed9ng h\u00f3a, c\u00f9ng l\u1ecbch v\u1ec7 sinh b\u1eb1ng n\u01b0\u1edbc ng\u1ecdt. V\u1edbi \u0111i\u1ec1u ki\u1ec7n phun s\u00f3ng ho\u1eb7c t\u1ea3i tr\u1ecdng cao, c\u00e2n nh\u1eafc n\u00e2ng c\u1ea5p l\u00ean duplex 2205.<\/p>\n<p>C\u1ea7n x\u00e1c \u0111\u1ecbnh \u0111\u00fang m\u00e1c, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t, quy tr\u00ecnh thi c\u00f4ng cho c\u00f4ng tr\u00ecnh c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n chuy\u00ean s\u00e2u v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t.<br \/>\nHotline: 0343.417.281<br \/>\nEmail: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00f4i tr\u01b0\u1eddng bi\u1ec3n gi\u00e0u chloride ph\u00e1 h\u1ee7y inox th\u01b0\u1eddng. Inox 316 v\u1edbi 2\u20133% Mo ch\u1ed1ng r\u1ed7, k\u1ebd h\u1edf, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd. H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c, ho\u00e0n thi\u1ec7n, b\u1ea3o tr\u00ec.<\/p>\n","protected":false},"author":7,"featured_media":1065,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1599","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\/1599","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=1599"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1599\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1065"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}