{"id":2036,"date":"2026-05-19T12:34:22","date_gmt":"2026-05-19T05:34:22","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-cong-trinh-ngoai-troi-o-khi-hau-nong-am-bac-bo\/"},"modified":"2026-05-19T12:34:22","modified_gmt":"2026-05-19T05:34:22","slug":"chon-inox-cho-cong-trinh-ngoai-troi-o-khi-hau-nong-am-bac-bo","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-cong-trinh-ngoai-troi-o-khi-hau-nong-am-bac-bo\/","title":{"rendered":"Ch\u1ecdn inox cho c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi \u1edf kh\u00ed h\u1eadu n\u00f3ng \u1ea9m B\u1eafc B\u1ed9"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-khi-hau-bac-bo-va-cac-co-che-an-mon-can-luu-y\">Kh\u00ed h\u1eadu B\u1eafc B\u1ed9 v\u00e0 c\u00e1c c\u01a1 ch\u1ebf \u0103n m\u00f2n c\u1ea7n l\u01b0u \u00fd<\/a><\/li>\n<li><a href=\"#toc-1-nguyen-tac-chon-mac-inox-theo-moi-truong-ngoai-tro\">Nguy\u00ean t\u1eafc ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi<\/a><\/li>\n<li><a href=\"#toc-2-so-sanh-nhanh-cac-mac-thong-dung\">So s\u00e1nh nhanh c\u00e1c m\u00e1c th\u00f4ng d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-3-lua-chon-theo-hang-muc-cong-trinh\">L\u1ef1a ch\u1ecdn theo h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh<\/a><\/li>\n<li><a href=\"#toc-4-hoan-thien-be-mat-va-che-tao-de-chong-o-tra\">Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 ch\u1ebf t\u1ea1o \u0111\u1ec3 ch\u1ed1ng \u1ed1 tr\u00e0<\/a><\/li>\n<li><a href=\"#toc-5-thiet-ke-chi-tiet-giup-inox-ben-lau\">Thi\u1ebft k\u1ebf chi ti\u1ebft gi\u00fap inox b\u1ec1n l\u00e2u<\/a><\/li>\n<li><a href=\"#toc-6-bao-tri-theo-vung-moi-truong\">B\u1ea3o tr\u00ec theo v\u00f9ng m\u00f4i tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-7-ngan-sach-va-chi-phi-vong-doi\">Ng\u00e2n s\u00e1ch v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-8-tieu-chuan-vat-tu-va-kiem-tra-khi-nhan-hang\">Ti\u00eau chu\u1ea9n v\u1eadt t\u01b0 v\u00e0 ki\u1ec3m tra khi nh\u1eadn h\u00e0ng<\/a><\/li>\n<li><a href=\"#toc-9-kich-ban-dien-hinh-va-khuyen-nghi-nhanh\">K\u1ecbch b\u1ea3n \u0111i\u1ec3n h\u00ecnh v\u00e0 khuy\u1ebfn ngh\u1ecb nhanh<\/a><\/li>\n<li><a href=\"#toc-10-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Mi\u1ec1n B\u1eafc Vi\u1ec7t Nam c\u00f3 kh\u00ed h\u1eadu n\u00f3ng \u1ea9m, m\u01b0a nhi\u1ec1u, \u00f4 nhi\u1ec5m \u0111\u00f4 th\u1ecb v\u00e0 h\u01a1i mu\u1ed1i t\u1eeb ven bi\u1ec3n\u2014t\u1ed5 h\u1ee3p \u0111i\u1ec1u ki\u1ec7n d\u1ec5 g\u00e2y \u1ed1 tr\u00e0, r\u1ed7 pitting v\u00e0 \u0103n m\u00f2n khe k\u1ebd tr\u00ean inox. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p khuy\u1ebfn ngh\u1ecb m\u00e1c th\u00e9p, \u0111\u1ed9 d\u00e0y, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t, ti\u00eau chu\u1ea9n v\u1eadt t\u01b0 v\u00e0 h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf\u2013b\u1ea3o tr\u00ec \u0111\u1ec3 c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi v\u1eadn h\u00e0nh b\u1ec1n b\u1ec9, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi. Ch\u1ee7 \u0111\u1ec1 n\u00e0y n\u1eb1m trong b\u1ee9c tranh t\u1ed5ng th\u1ec3 \u201cch\u1ecdn inox theo m\u00f4i tr\u01b0\u1eddng, m\u1ee5c \u0111\u00edch v\u00e0 ng\u00e2n s\u00e1ch\u201d, nh\u01b0ng n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ee7 tr\u1ecdn v\u1eb9n \u0111\u1ec3 b\u1ea1n ra quy\u1ebft \u0111\u1ecbnh ngay.<\/p>\n<h2 id=\"toc-0-khi-hau-bac-bo-va-cac-co-che-an-mon-can-luu-y\">Kh\u00ed h\u1eadu B\u1eafc B\u1ed9 v\u00e0 c\u00e1c c\u01a1 ch\u1ebf \u0103n m\u00f2n c\u1ea7n l\u01b0u \u00fd<\/h2>\n<p>&#8211; \u0110\u1ed9 \u1ea9m cao quanh n\u0103m (trung b\u00ecnh 75\u201385%), m\u01b0a theo m\u00f9a, kh\u00f4 ch\u1eadm sau m\u01b0a t\u1ea1o \u1ea9m \u01b0\u1edbt l\u01b0u c\u1eefu tr\u00ean b\u1ec1 m\u1eb7t.<br \/>\n&#8211; \u0110\u00f4 th\u1ecb\/ c\u00f4ng nghi\u1ec7p (H\u00e0 N\u1ed9i, B\u1eafc Ninh, H\u1ea3i D\u01b0\u01a1ng\u2026) c\u00f3 SO2\/NOx l\u00e0m t\u0103ng \u0103n m\u00f2n kh\u00ed quy\u1ec3n.<br \/>\n&#8211; Ven bi\u1ec3n (Qu\u1ea3ng Ninh, H\u1ea3i Ph\u00f2ng, Th\u00e1i B\u00ecnh\u2026): h\u01a1i mu\u1ed1i clorua mang theo gi\u00f3; nguy c\u01a1 cao trong b\u00e1n k\u00ednh 0\u20135 km t\u1eeb bi\u1ec3n, v\u1eabn hi\u1ec7n h\u1eefu \u0111\u1ebfn ~20 km t\u00f9y \u0111\u1ecba h\u00ecnh v\u00e0 h\u01b0\u1edbng gi\u00f3.<br \/>\n&#8211; C\u01a1 ch\u1ebf ch\u00ednh:<br \/>\n  &#8211; R\u1ed7\/kh\u00eda (pitting\/crevice) do ion Cl\u2212 t\u1ea5n c\u00f4ng m\u00e0ng th\u1ee5 \u0111\u1ed9ng, \u0111\u1eb7c bi\u1ec7t \u1edf m\u1ed1i h\u00e0n, khe k\u1eb9p, \u0111i\u1ec3m b\u00e1m b\u1ea9n.<br \/>\n  &#8211; \u1ed0 tr\u00e0 (tea staining): \u0111\u1ed5i m\u00e0u n\u00e2u tr\u00ean b\u1ec1 m\u1eb7t, kh\u00f4ng g\u00e2y h\u1ecfng t\u1ee9c th\u00ec nh\u01b0ng x\u1ea5u th\u1ea9m m\u1ef9 v\u00e0 b\u00e1o hi\u1ec7u nguy c\u01a1 \u0103n m\u00f2n c\u1ee5c b\u1ed9 t\u0103ng.<br \/>\n  &#8211; \u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a khi ti\u1ebfp x\u00fac kim lo\u1ea1i kh\u00e1c (th\u00e9p carbon, nh\u00f4m, \u0111\u1ed3ng) trong m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n.<\/p>\n<h2 id=\"toc-1-nguyen-tac-chon-mac-inox-theo-moi-truong-ngoai-tro\">Nguy\u00ean t\u1eafc ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi<\/h2>\n<p>&#8211; N\u1ed9i \u0111\u1ecba s\u1ea1ch (n\u00f4ng th\u00f4n\/\u0111\u00f4 th\u1ecb \u00edt \u00f4 nhi\u1ec5m, c\u00e1ch bi\u1ec3n >20 km):<br \/>\n  &#8211; T\u1ed1i thi\u1ec3u 304\/304L. D\u00f9ng 316L n\u1ebfu mu\u1ed1n gi\u1ea3m b\u1ea3o tr\u00ec v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd th\u1ea9m m\u1ef9.<br \/>\n  &#8211; Tr\u00e1nh 201 cho h\u1ea1ng m\u1ee5c l\u1ed9 thi\u00ean\u2014ch\u1ec9 c\u00e2n nh\u1eafc v\u1edbi c\u1ea5u ki\u1ec7n c\u00f3 m\u00e1i che t\u1ed1t v\u00e0 b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean.<br \/>\n&#8211; \u0110\u00f4 th\u1ecb, khu c\u00f4ng nghi\u1ec7p nh\u1eb9 (kh\u00ed SOx\/NOx, b\u1ee5i m\u1ecbn):<br \/>\n  &#8211; 304L l\u00e0 m\u1ee9c kh\u1edfi \u0111i\u1ec3m; 316L cho h\u1ea1ng m\u1ee5c kh\u00f3 v\u1ec7 sinh ho\u1eb7c y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 cao.<br \/>\n&#8211; Ven bi\u1ec3n 5\u201320 km:<br \/>\n  &#8211; 316L khuy\u1ebfn ngh\u1ecb. 304L ch\u1ec9 khi b\u1ec1 m\u1eb7t m\u1ecbn, c\u00f3 m\u00e1i che v\u00e0 v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 ch\u1eb7t ch\u1ebd.<br \/>\n&#8211; Ven bi\u1ec3n 0\u20135 km, \u0111\u1ea3o, khu v\u1ef1c s\u01b0\u01a1ng mu\u1ed1i\/gi\u1ecdt b\u1eafn:<br \/>\n  &#8211; T\u1ed1i thi\u1ec3u 316L; \u01b0u ti\u00ean 2205 duplex cho h\u1ea1ng m\u1ee5c s\u00e1t m\u00e9p n\u01b0\u1edbc\/splash zone, c\u1ecdc b\u00edch, lan can c\u1ea7u c\u1ea3ng.<br \/>\n  &#8211; Ferritic 444 c\u00f3 th\u1ec3 thay th\u1ebf 316L trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng n\u1ebfu h\u00e0n\/ch\u1ebf t\u1ea1o \u0111\u00fang chu\u1ea9n.<br \/>\n&#8211; H\u1ed3 b\u01a1i ngo\u00e0i tr\u1eddi, c\u00f4ng vi\u00ean n\u01b0\u1edbc, g\u1ea7n th\u00e1p gi\u1ea3i nhi\u1ec7t:<br \/>\n  &#8211; 316L ho\u1eb7c 2205; tuy\u1ec7t \u0111\u1ed1i tr\u00e1nh 304\/201.<br \/>\n&#8211; G\u1ee3i \u00fd d\u00f9ng ch\u1ec9 s\u1ed1 PREN (Pitting Resistance Equivalent Number) \u0111\u1ec3 so s\u00e1nh kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7:<br \/>\n  &#8211; PREN \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N<br \/>\n  &#8211; 304\/304L: ~18\u201319; 316\/316L: ~24; 444: ~24\u201325; 2205: ~34\u201335<br \/>\n  &#8211; PREN cao h\u01a1n \u2192 b\u1ec1n Cl\u2212 t\u1ed1t h\u01a1n.<\/p>\n<p>Ngu\u1ed3n tham kh\u1ea3o: ASSDA \u2013 Tea staining guideline; Nickel Institute \u2013 Selection of stainless steels for atmospheric environments; Outokumpu Corrosion Handbook.<\/p>\n<h2 id=\"toc-2-so-sanh-nhanh-cac-mac-thong-dung\">So s\u00e1nh nhanh c\u00e1c m\u00e1c th\u00f4ng d\u1ee5ng<\/h2>\n<p>&#8211; 201 (Cr-Mn-Ni th\u1ea5p): Gi\u00e1 th\u1ea5p nh\u01b0ng k\u00e9m b\u1ec1n clorua; d\u1ec5 \u1ed1 tr\u00e0\/ \u0103n m\u00f2n ngo\u00e0i tr\u1eddi n\u00f3ng \u1ea9m. Ch\u1ec9 d\u00f9ng n\u1ed9i th\u1ea5t ho\u1eb7c ngo\u00e0i tr\u1eddi c\u00f3 m\u00e1i che s\u00e2u, m\u00f4i tr\u01b0\u1eddng s\u1ea1ch, b\u1ea3o tr\u00ec d\u00e0y.<br \/>\n&#8211; 304\/304L (EN 1.4301\/1.4307): L\u1ef1a ch\u1ecdn n\u1ec1n t\u1ea3ng cho n\u1ed9i \u0111\u1ecba; b\u1ea3n L gi\u1ea3m nh\u1ea1y c\u1ea3m h\u00f3a khi h\u00e0n (ch\u1ed1ng \u0103n m\u00f2n li\u00ean tinh).<br \/>\n&#8211; 316\/316L (EN 1.4401\/1.4404): C\u00f3 Mo ~2\u20132.5% \u2192 kh\u00e1ng r\u1ed7 v\u01b0\u1ee3t tr\u1ed9i; \u01b0u ti\u00ean cho ven bi\u1ec3n\/\u0111\u00f4 th\u1ecb \u00f4 nhi\u1ec5m; b\u1ea3n L cho k\u1ebft c\u1ea5u h\u00e0n nhi\u1ec1u.<br \/>\n&#8211; 444 (EN 1.4521, ferritic Mo cao, Nb\/Ti \u1ed5n \u0111\u1ecbnh): Kh\u00e1ng clorua t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 316, gi\u00e3n n\u1edf th\u1ea5p, kh\u00f4ng b\u1ecb nh\u1ea1y c\u1ea3m h\u00f3a nh\u01b0 austenitic; y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t h\u00e0n t\u1ed1t, u\u1ed1n d\u1eadp c\u1ea7n kinh nghi\u1ec7m.<br \/>\n&#8211; 2205 duplex (EN 1.4462): \u0110\u1ed9 b\u1ec1n cao, kh\u00e1ng clorua r\u1ea5t t\u1ed1t; h\u1ee3p cho splash zone, k\u1ebft c\u1ea5u t\u1ea3i l\u1edbn; gia c\u00f4ng h\u00e0n c\u1ea7n th\u1ee3\/que 2209, ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/p>\n<h2 id=\"toc-3-lua-chon-theo-hang-muc-cong-trinh\">L\u1ef1a ch\u1ecdn theo h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh<\/h2>\n<h3>Lan can, tay v\u1ecbn, h\u00e0ng r\u00e0o ban c\u00f4ng<\/h3>\n<p>&#8211; V\u1eadt li\u1ec7u: 304L (n\u1ed9i \u0111\u1ecba) ho\u1eb7c 316L (ven bi\u1ec3n\/\u0111\u00f4 th\u1ecb \u00f4 nhi\u1ec5m). 2205 cho c\u1ea7u c\u1ea3ng\/s\u00e1t bi\u1ec3n.<br \/>\n&#8211; \u1ed0ng trang tr\u00ed (ASTM A554): \u00d838\u201351 mm; chi\u1ec1u d\u00e0y 1.2\u20131.5 mm (tay v\u1ecbn), tr\u1ee5 1.5\u20132.0 mm.<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n: No.4 ho\u1eb7c HL (v\u00e2n d\u1ecdc), Ra \u22640.5\u20130.8 \u00b5m \u0111\u1ec3 gi\u1ea3m \u1ed1 tr\u00e0; n\u1ebfu y\u00eau c\u1ea7u cao: \u0111\u00e1nh b\u00f3ng g\u01b0\u01a1ng\/\u0111i\u1ec7n ph\u00e2n.<br \/>\n&#8211; Li\u00ean k\u1ebft: Bul\u00f4ng A2-70 (304) cho n\u1ed9i \u0111\u1ecba, A4-70 (316) cho ven bi\u1ec3n; b\u1ea3n m\u00e3 t\u00e1ch khe v\u1edbi \u0111\u1ec7m nh\u1ef1a \u0111\u1ec3 tr\u00e1nh \u1ee9 n\u01b0\u1edbc\/\u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; Keo tr\u00e1m khe silicone trung t\u00ednh (kh\u00f4ng ch\u1ee9a chloride), khoan tho\u00e1t n\u01b0\u1edbc \u1edf \u0111i\u1ec3m th\u1ea5p nh\u1ea5t.<\/p>\n<h3>M\u00e1i che, khung bi\u1ec3n b\u1ea3ng, m\u1eb7t d\u1ef1ng<\/h3>\n<p>&#8211; \u1ed0ng h\u1ed9p 40\u00d740\/50\u00d750\/60\u00d730 d\u00e0y 1.5\u20132.0 mm; 304L ho\u1eb7c 316L theo m\u00f4i tr\u01b0\u1eddng.<br \/>\n&#8211; B\u1ed1 tr\u00ed d\u1ed1c \u22653\u00b0 v\u00e0 m\u00e9p nh\u1ecf gi\u1ecdt; b\u1ecbt \u0111\u1ea7u \u1ed1ng, th\u00f4ng h\u01a1i \u0111\u1ec3 tr\u00e1nh ng\u01b0ng t\u1ee5.<br \/>\n&#8211; T\u1ea5m 0.8\u20131.5 mm cho \u1ed1p m\u1eb7t d\u1ef1ng; \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn (BA\/No.4 m\u1ecbn), h\u1ea1n ch\u1ebf g\u1edd s\u1eafc sinh khe k\u1ebd.<\/p>\n<h3>C\u1ed5ng, c\u1eeda, c\u1ea7u thang ngo\u00e0i tr\u1eddi<\/h3>\n<p>&#8211; 304L (n\u1ed9i \u0111\u1ecba), 316L (ven bi\u1ec3n). B\u1ea3n l\u1ec1\/kh\u00f3a n\u00ean \u0111\u1ed3ng b\u1ed9 m\u00e1c v\u1edbi khung. Tr\u00e1nh pha tr\u1ed9n 304 khung \u2013 201 ph\u1ee5 ki\u1ec7n.<\/p>\n<h3>Bu l\u00f4ng, c\u00e1p, ph\u1ee5 ki\u1ec7n li\u00ean k\u1ebft<\/h3>\n<p>&#8211; Bul\u00f4ng \u0111ai \u1ed1c: A2-70 (304) n\u1ed9i \u0111\u1ecba; A4-70 (316) ven bi\u1ec3n\/gi\u00e0n ph\u01a1i; v\u1edbi 2205 d\u00f9ng fastener 316 t\u1ed1i thi\u1ec3u.<br \/>\n&#8211; C\u00e1p treo, t\u0103ng \u0111\u01a1: 316; b\u1ecbt \u0111\u1ea7u tr\u00e1nh n\u01b0\u1edbc v\u00e0o; b\u00f4i m\u1ee1 trung t\u00ednh t\u1ea1i ren n\u1ebfu g\u1ea7n bi\u1ec3n.<br \/>\n&#8211; Tr\u00e1nh fastener th\u00e9p m\u1ea1 k\u1ebdm g\u1eafn v\u00e0o k\u1ebft c\u1ea5u inox \u1edf ngo\u00e0i tr\u1eddi \u1ea9m m\u1eb7n (nguy c\u01a1 \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a).<\/p>\n<h3>\u1ed0ng tho\u00e1t n\u01b0\u1edbc, b\u1ed3n h\u1ee9ng n\u01b0\u1edbc m\u01b0a<\/h3>\n<p>&#8211; 304L n\u1ed9i \u0111\u1ecba; 316L ven bi\u1ec3n\/kh\u00ed c\u00f4ng nghi\u1ec7p; m\u1ed1i h\u00e0n d\u00f9ng que 308L (cho 304L) ho\u1eb7c 316L (cho 316L). T\u1ea9y g\u1ec9\u2013th\u1ee5 \u0111\u1ed9ng sau h\u00e0n.<\/p>\n<h3>C\u00f4ng tr\u00ecnh ven bi\u1ec3n\/splash zone<\/h3>\n<p>&#8211; 316L t\u1ed1i thi\u1ec3u; n\u01a1i b\u1ecb gi\u1ecdt b\u1eafn li\u00ean t\u1ee5c ho\u1eb7c b\u1ea3o tr\u00ec kh\u00f3: \u01b0u ti\u00ean 2205; ho\u00e0n thi\u1ec7n \u0111\u00e1nh b\u00f3ng \u0111i\u1ec7n ph\u00e2n v\u00e0 thi\u1ebft k\u1ebf kh\u00f4ng gi\u1eef mu\u1ed1i.<\/p>\n<h2 id=\"toc-4-hoan-thien-be-mat-va-che-tao-de-chong-o-tra\">Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 ch\u1ebf t\u1ea1o \u0111\u1ec3 ch\u1ed1ng \u1ed1 tr\u00e0<\/h2>\n<p>&#8211; Ch\u1ecdn b\u1ec1 m\u1eb7t m\u1ecbn: BA, No.4 m\u1ecbn, HL; \u0111\u1eb7t v\u00e2n d\u1ecdc theo h\u01b0\u1edbng ch\u1ea3y n\u01b0\u1edbc. B\u1ec1 m\u1eb7t c\u00e0ng th\u00f4 (Ra cao) c\u00e0ng d\u1ec5 \u1ed1 tr\u00e0.<br \/>\n&#8211; \u0110\u00e1nh b\u00f3ng\/\u0111i\u1ec7n \u0111\u00e1nh b\u00f3ng (electropolish) cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n ho\u1eb7c chi ti\u1ebft ph\u1ee9c t\u1ea1p.<br \/>\n&#8211; Tr\u00e1nh nhi\u1ec5m s\u1eaft: d\u00f9ng b\u00e0n ch\u1ea3i\/\u0111\u00e1 m\u00e0i chuy\u00ean cho inox; kh\u00f4ng gia c\u00f4ng chung v\u1edbi th\u00e9p carbon; che ch\u1eafn phun bi.<br \/>\n&#8211; X\u1eed l\u00fd sau h\u00e0n: t\u1ea9y g\u1ec9\u2013t\u1ea9y x\u1ec9 b\u1eb1ng gel\/paste axit (ASTM A380) v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a (ASTM A967) \u0111\u1ec3 kh\u00f4i ph\u1ee5c m\u00e0ng Cr2O3.<br \/>\n&#8211; Kh\u00f4ng d\u00f9ng ch\u1ea5t t\u1ea9y c\u00f3 chloride\/bleach (NaClO). V\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 b\u1eb1ng x\u00e0 ph\u00f2ng trung t\u00ednh v\u00e0 n\u01b0\u1edbc s\u1ea1ch; tr\u00e1ng k\u1ef9.<\/p>\n<p>Ngu\u1ed3n: ASTM A380\/A967; ASSDA \u2013 Fabrication and avoiding contamination.<\/p>\n<h2 id=\"toc-5-thiet-ke-chi-tiet-giup-inox-ben-lau\">Thi\u1ebft k\u1ebf chi ti\u1ebft gi\u00fap inox b\u1ec1n l\u00e2u<\/h2>\n<p>&#8211; Tr\u00e1nh khe k\u1ebd, t\u00fai n\u01b0\u1edbc: bo m\u00e9p, tho\u00e1t n\u01b0\u1edbc, n\u1eafp b\u1ecbt c\u00f3 l\u1ed7 th\u00f4ng h\u01a1i.<br \/>\n&#8211; C\u00e1ch ly kim lo\u1ea1i kh\u00e1c: d\u00f9ng \u0111\u1ec7m nh\u1ef1a\/teflon khi ti\u1ebfp x\u00fac v\u1edbi th\u00e9p carbon\/nh\u00f4m\/\u0111\u1ed3ng \u1edf m\u00f4i tr\u01b0\u1eddng \u1ea9m.<br \/>\n&#8211; Tr\u00e1nh ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi g\u1ed7 x\u1eed l\u00fd mu\u1ed1i\/\u0111\u1ed3ng; n\u1ebfu b\u1eaft bu\u1ed9c, ph\u1ee7 s\u01a1n c\u00e1ch ly v\u00e0 d\u00f9ng mi\u1ebfng \u0111\u1ec7m.<br \/>\n&#8211; D\u1ef1 ph\u00f2ng gi\u00e3n n\u1edf nhi\u1ec7t; h\u1ea1n ch\u1ebf \u0111i\u1ec3m k\u1eb9t mu\u1ed1i t\u1ea1i li\u00ean k\u1ebft che khu\u1ea5t (\u1ed1c \u1ea9n).<br \/>\n&#8211; B\u1ea3o v\u1ec7 trong thi c\u00f4ng: che ph\u1ee7 khi c\u1eaft m\u00e0i b\u00ea t\u00f4ng, r\u1eeda s\u1ea1ch v\u1eefa xi m\u0103ng b\u00e1m.<\/p>\n<h2 id=\"toc-6-bao-tri-theo-vung-moi-truong\">B\u1ea3o tr\u00ec theo v\u00f9ng m\u00f4i tr\u01b0\u1eddng<\/h2>\n<p>&#8211; L\u1ecbch v\u1ec7 sinh khuy\u1ebfn ngh\u1ecb:<br \/>\n  &#8211; N\u1ed9i \u0111\u1ecba s\u1ea1ch: m\u1ed7i 3\u20134 th\u00e1ng.<br \/>\n  &#8211; \u0110\u00f4 th\u1ecb\/c\u00f4ng nghi\u1ec7p: m\u1ed7i 1\u20132 th\u00e1ng.<br \/>\n  &#8211; Ven bi\u1ec3n \u22645 km: h\u00e0ng tu\u1ea7n \u0111\u1ebfn 2 tu\u1ea7n\/l\u1ea7n; x\u1ecbt r\u1eeda n\u01b0\u1edbc ng\u1ecdt k\u1ef9 c\u00e0ng.<br \/>\n&#8211; Quy tr\u00ecnh c\u01a1 b\u1ea3n: r\u1eeda n\u01b0\u1edbc \u2192 lau b\u1eb1ng dung d\u1ecbch trung t\u00ednh \u2192 ch\u00e0 nh\u1eb9 theo v\u00e2n \u2192 tr\u00e1ng n\u01b0\u1edbc \u2192 lau kh\u00f4.<br \/>\n&#8211; X\u1eed l\u00fd \u1ed1 tr\u00e0 nh\u1eb9: d\u00f9ng dung d\u1ecbch oxalic acid\/cleaner chuy\u00ean d\u1ee5ng cho inox, sau \u0111\u00f3 trung h\u00f2a v\u00e0 th\u1ee5 \u0111\u1ed9ng l\u1ea1i.<br \/>\n&#8211; Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3: m\u1ed1i h\u00e0n, khe k\u1eb9p, ch\u00e2n tr\u1ee5, bu l\u00f4ng; si\u1ebft l\u1ea1i v\u00e0 thay th\u1ebf ph\u1ee5 ki\u1ec7n k\u00e9m m\u00e1c.<\/p>\n<p>Ngu\u1ed3n: ASSDA \u2013 Tea staining: causes, prevention and cure.<\/p>\n<h2 id=\"toc-7-ngan-sach-va-chi-phi-vong-doi\">Ng\u00e2n s\u00e1ch v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/h2>\n<p>&#8211; T\u01b0\u01a1ng quan gi\u00e1 tham kh\u1ea3o (bi\u1ebfn \u0111\u1ed9ng theo th\u1ecb tr\u01b0\u1eddng): 201 \u2248 0.6\u20130.7\u00d7 304; 316 \u2248 1.6\u20131.8\u00d7 304; 2205 \u2248 2.0\u20132.5\u00d7 304; 444 \u2248 ngang ho\u1eb7c th\u1ea5p h\u01a1n \u0111\u00f4i ch\u00fat so v\u1edbi 316.<br \/>\n&#8211; Trong m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n, 316\/2205 th\u01b0\u1eddng r\u1ebb h\u01a1n v\u1ec1 chi ph\u00ed v\u00f2ng \u0111\u1eddi nh\u1edd gi\u1ea3m v\u1ec7 sinh, \u00edt thay th\u1ebf s\u1edbm v\u00e0 tr\u00e1nh h\u01b0 h\u1ecfng th\u1ea9m m\u1ef9.<\/p>\n<h2 id=\"toc-8-tieu-chuan-vat-tu-va-kiem-tra-khi-nhan-hang\">Ti\u00eau chu\u1ea9n v\u1eadt t\u01b0 v\u00e0 ki\u1ec3m tra khi nh\u1eadn h\u00e0ng<\/h2>\n<p>&#8211; M\u00e1c\/chu\u1ea9n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng:<br \/>\n  &#8211; 304\/304L: EN 1.4301\/1.4307; 316\/316L: EN 1.4401\/1.4404; 444: EN 1.4521; 2205: EN 1.4462.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m:<br \/>\n  &#8211; T\u1ea5m\/coil: ASTM A240; \u1ed0ng trang tr\u00ed: ASTM A554; \u1ed0ng c\u00f4ng nghi\u1ec7p: ASTM A312; Thanh tr\u00f2n: ASTM A276; Bu l\u00f4ng: ISO 3506 (A2\/A4).<br \/>\n&#8211; H\u1ed3 s\u01a1 v\u1eadt li\u1ec7u: y\u00eau c\u1ea7u MTR\/COA th\u1ec3 hi\u1ec7n th\u00e0nh ph\u1ea7n (Mo \u22652.0% v\u1edbi 316\/444; N ~0.14\u20130.2% v\u1edbi 2205).<br \/>\n&#8211; Ki\u1ec3m tra nh\u1eadn h\u00e0ng: \u0111o chi\u1ec1u d\u00e0y, b\u1ec1 m\u1eb7t; th\u1eed PMI n\u1ebfu h\u1ea1ng m\u1ee5c quan tr\u1ecdng; nam ch\u00e2m kh\u00f4ng ph\u1ea3i ph\u00e9p th\u1eed x\u00e1c \u0111\u1ecbnh m\u00e1c tin c\u1eady.<\/p>\n<h2 id=\"toc-9-kich-ban-dien-hinh-va-khuyen-nghi-nhanh\">K\u1ecbch b\u1ea3n \u0111i\u1ec3n h\u00ecnh v\u00e0 khuy\u1ebfn ngh\u1ecb nhanh<\/h2>\n<p>&#8211; Ban c\u00f4ng nh\u00e0 ph\u1ed1 H\u00e0 N\u1ed9i (c\u00e1ch bi\u1ec3n >100 km): Lan can 304L, No.4 m\u1ecbn; bul\u00f4ng A2-70; v\u1ec7 sinh m\u1ed7i 2\u20133 th\u00e1ng.<br \/>\n&#8211; Khu ngh\u1ec9 d\u01b0\u1ee1ng H\u1ea1 Long (s\u00e1t bi\u1ec3n): Lan can 316L ho\u1eb7c 2205; electropolish; bul\u00f4ng A4-70; r\u1eeda n\u01b0\u1edbc ng\u1ecdt h\u00e0ng tu\u1ea7n.<br \/>\n&#8211; Nh\u00e0 x\u01b0\u1edfng H\u1ea3i Ph\u00f2ng (kh\u00ed m\u1eb7n + c\u00f4ng nghi\u1ec7p): K\u1ebft c\u1ea5u ph\u1ee5 316L; \u1ed1ng m\u00e1ng 316L; fastener A4-70; thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc t\u1ed1t.<br \/>\n&#8211; C\u1ea7u \u0111i b\u1ed9 ven h\u1ed3 (\u0111\u00f4 th\u1ecb \u00f4 nhi\u1ec5m): 316L b\u1ec1 m\u1eb7t HL; l\u1ecbch v\u1ec7 sinh h\u00e0ng th\u00e1ng; tr\u00e1nh khe k\u1ebd t\u1ea1i ch\u00e2n lan can.<br \/>\n&#8211; C\u00f4ng vi\u00ean n\u01b0\u1edbc ngo\u00e0i tr\u1eddi: 2205 cho tay v\u1ecbn g\u1ea7n h\u1ed3; fastener 316; ki\u1ec3m so\u00e1t h\u00f3a ch\u1ea5t, r\u1eeda sau gi\u1edd v\u1eadn h\u00e0nh.<\/p>\n<h2 id=\"toc-10-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; Nickel Institute \u2013 Guidelines for selection of stainless steels in atmospheric environments.<br \/>\n&#8211; Australian Stainless Steel Development Association (ASSDA) \u2013 Tea staining: causes, prevention and cure; fabrication guidelines.<br \/>\n&#8211; Outokumpu \u2013 Corrosion Handbook.<br \/>\n&#8211; ASTM A240, A312, A276, A554, A380, A967; ISO 3506.<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u0110\u1ec3 c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi \u1edf kh\u00ed h\u1eadu n\u00f3ng \u1ea9m B\u1eafc B\u1ed9 b\u1ec1n \u0111\u1eb9p v\u00e0 \u00edt b\u1ea3o tr\u00ec, h\u00e3y ch\u1ecdn m\u00e1c inox theo m\u1ee9c ph\u01a1i nhi\u1ec5m: 304L cho n\u1ed9i \u0111\u1ecba s\u1ea1ch; 316L cho \u0111\u00f4 th\u1ecb\/ven bi\u1ec3n; 2205 cho v\u00f9ng s\u01b0\u01a1ng mu\u1ed1i\/splash zone; c\u00f3 th\u1ec3 d\u00f9ng 444 nh\u01b0 ph\u01b0\u01a1ng \u00e1n t\u1ed1i \u01b0u chi ph\u00ed trong m\u1ed9t s\u1ed1 ca. Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t m\u1ecbn, x\u1eed l\u00fd sau h\u00e0n \u0111\u00fang chu\u1ea9n, thi\u1ebft k\u1ebf tr\u00e1nh \u1ee9 n\u01b0\u1edbc\/khe k\u1ebd v\u00e0 v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 l\u00e0 b\u1ed1n tr\u1ee5 c\u1ed9t ch\u1ed1ng \u1ed1 tr\u00e0 v\u00e0 \u0103n m\u00f2n. Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng theo ASTM\/ISO ngay t\u1eeb \u0111\u1ea7u s\u1ebd kh\u00f3a ch\u1eb7t r\u1ee7i ro v\u1eadt t\u01b0 v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n<p>Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n gi\u1ea3i ph\u00e1p 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 ch\u1ecdn inox ngo\u00e0i tr\u1eddi cho mi\u1ec1n B\u1eafc: 304\/316\/2205 theo v\u00f9ng n\u1ed9i \u0111\u1ecba\/ven bi\u1ec3n, ch\u1ed1ng \u1ed1 tr\u00e0, \u0111\u1ed9 d\u00e0y, ho\u00e0n thi\u1ec7n, h\u00e0n, thi\u1ebft k\u1ebf v\u00e0 b\u1ea3o tr\u00ec.<\/p>\n","protected":false},"author":7,"featured_media":1004,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2036","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\/2036","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=2036"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2036\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1004"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}