{"id":20363,"date":"2021-02-23T07:07:43","date_gmt":"2021-02-23T07:07:43","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=20363"},"modified":"2021-10-11T06:06:18","modified_gmt":"2021-10-11T06:06:18","slug":"what-is-salt-spray-test-for-metal","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/cai-gi-la-muoi-phun-thu-cho-kim-loai\/","title":{"rendered":"Th\u1eed nghi\u1ec7m phun mu\u1ed1i cho kim lo\u1ea1i l\u00e0 g\u00ec?"},"content":{"rendered":"

\u0102n m\u00f2n l\u00e0 s\u1ef1 ph\u00e1 h\u1ee7y ho\u1eb7c bi\u1ebfn ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u ho\u1eb7c t\u00ednh ch\u1ea5t c\u1ee7a ch\u00fang d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng. H\u1ea7u h\u1ebft s\u1ef1 \u0103n m\u00f2n x\u1ea3y ra trong kh\u00ed quy\u1ec3n, n\u01a1i ch\u1ee9a oxy, \u0111\u1ed9 \u1ea9m, s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m.<\/strong><\/strong><\/p>

\u0102n m\u00f2n phun mu\u1ed1i l\u00e0 m\u1ed9t trong nh\u1eefng \u0103n m\u00f2n kh\u00ed quy\u1ec3n ph\u1ed5 bi\u1ebfn v\u00e0 ph\u00e1 h\u1ee7y nh\u1ea5t. S\u1ef1 \u0103n m\u00f2n b\u1ec1 m\u1eb7t kim lo\u1ea1i do mu\u1ed1i phun g\u00e2y ra l\u00e0 do ph\u1ea3n \u1ee9ng \u0111i\u1ec7n ho\u00e1 gi\u1eefa c\u00e1c ion clorua xuy\u00ean qua l\u1edbp oxit v\u00e0 l\u1edbp b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t kim lo\u1ea1i v\u00e0 kim lo\u1ea1i b\u00ean trong. \u0110\u1ed3ng th\u1eddi, ion clorua c\u00f3 ch\u1ee9a m\u1ed9t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng hydrat h\u00f3a nh\u1ea5t \u0111\u1ecbnh, r\u1ea5t d\u1ec5 b\u1ecb \u00e9p ra ngo\u00e0i theo c\u00e1c l\u1ed7 r\u1ed7ng v\u00e0 v\u1ebft n\u1ee9t, h\u1ea5p ph\u1ee5 tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i v\u00e0 thay th\u1ebf oxy trong l\u1edbp oxit, bi\u1ebfn oxit kh\u00f4ng tan th\u00e0nh clorua h\u00f2a tan v\u00e0 b\u1ec1 m\u1eb7t th\u1ee5 \u0111\u1ed9ng th\u00e0nh b\u1ec1 m\u1eb7t ho\u1ea1t \u0111\u1ed9ng.<\/strong><\/strong><\/p>

Th\u1eed nghi\u1ec7m phun mu\u1ed1i l\u00e0 m\u1ed9t lo\u1ea1i th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng phun mu\u1ed1i m\u00f4 ph\u1ecfng nh\u00e2n t\u1ea1o \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m phun mu\u1ed1i \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a s\u1ea3n ph\u1ea9m ho\u1eb7c v\u1eadt li\u1ec7u kim lo\u1ea1i. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i, m\u1ed9t l\u00e0 th\u1eed nghi\u1ec7m ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean, hai l\u00e0 th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng phun mu\u1ed1i m\u00f4 ph\u1ecfng gia t\u1ed1c nh\u00e2n t\u1ea1o.<\/strong><\/strong><\/p>

Artificial simulated salt spray environment test is to use a kind of test equipment with a certain volume space – salt spray test chamber (as shown in the figure). In its volume space, artificial method is used to create salt spray environment to assess the quality of salt spray corrosion resistance of products.<\/strong><\/strong><\/p>

So v\u1edbi m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean, n\u1ed3ng \u0111\u1ed9 mu\u1ed1i clorua trong m\u00f4i tr\u01b0\u1eddng phun mu\u1ed1i c\u00f3 th\u1ec3 g\u1ea5p v\u00e0i l\u1ea7n ho\u1eb7c h\u00e0ng ch\u1ee5c l\u1ea7n trong m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean th\u00f4ng th\u01b0\u1eddng, do \u0111\u00f3 t\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3, v\u00e0 th\u1eddi gian thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ki\u1ec3m tra phun mu\u1ed1i \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn r\u1ea5t nhi\u1ec1u. N\u1ebfu m\u1ed9t m\u1eabu s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m trong m\u00f4i tr\u01b0\u1eddng ti\u1ebfp x\u00fac t\u1ef1 nhi\u00ean, c\u00f3 th\u1ec3 m\u1ea5t m\u1ed9t n\u0103m \u0111\u1ec3 n\u00f3 b\u1ecb \u0103n m\u00f2n. Tuy nhi\u00ean, n\u1ebfu th\u1eed nghi\u1ec7m trong m\u00f4i tr\u01b0\u1eddng phun mu\u1ed1i m\u00f4 ph\u1ecfng nh\u00e2n t\u1ea1o th\u00ec ch\u1ec9 c\u1ea7n 24 gi\u1edd l\u00e0 c\u00f3 k\u1ebft qu\u1ea3 t\u01b0\u01a1ng t\u1ef1.<\/strong><\/p>

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Vi\u1ec7c phun mu\u1ed1i m\u00f4 ph\u1ecfng trong ph\u00f2ng th\u00ed nghi\u1ec7m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh b\u1ed1n lo\u1ea1i<\/strong><\/strong><\/h2>

(1) th\u1eed nghi\u1ec7m phun mu\u1ed1i trung t\u00ednh (th\u1eed nghi\u1ec7m NSS) l\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0103n m\u00f2n gia t\u1ed1c s\u1edbm nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t. N\u00f3 s\u1eed d\u1ee5ng dung d\u1ecbch NaCl 5% v\u00e0 \u0111\u1ed9 pH c\u1ee7a dung d\u1ecbch n\u1eb1m trong kho\u1ea3ng trung t\u00ednh (6,5 \u0111\u1ebfn 7,2) nh\u01b0 m\u1ed9t dung d\u1ecbch phun. Nhi\u1ec7t \u0111\u1ed9 th\u1eed nghi\u1ec7m l\u00e0 35 \u2103, v\u00e0 t\u1ed1c \u0111\u1ed9 l\u1eafng c\u1ee7a phun mu\u1ed1i l\u00e0 1 ~ 2ml \/ 80cm \/ h.<\/strong><\/strong><\/p>

(2) th\u1eed nghi\u1ec7m phun axetat (th\u1eed nghi\u1ec7m ASS) \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n tr\u00ean c\u01a1 s\u1edf th\u1eed nghi\u1ec7m phun mu\u1ed1i trung t\u00ednh. \u0110\u00f3 l\u00e0 th\u00eam m\u1ed9t s\u1ed1 axit axetic b\u0103ng v\u00e0o dung d\u1ecbch natri clorua 5%, \u0111\u1ec3 gi\u00e1 tr\u1ecb pH c\u1ee7a dung d\u1ecbch gi\u1ea3m xu\u1ed1ng kho\u1ea3ng 3, dung d\u1ecbch tr\u1edf n\u00ean c\u00f3 t\u00ednh axit v\u00e0 cu\u1ed1i c\u00f9ng mu\u1ed1i phun t\u1ea1o th\u00e0nh c\u0169ng tr\u1edf th\u00e0nh axit t\u1eeb phun mu\u1ed1i trung t\u00ednh. T\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n c\u1ee7a n\u00f3 nhanh h\u01a1n kho\u1ea3ng ba l\u1ea7n so v\u1edbi th\u1eed nghi\u1ec7m c\u1ee7a NSS.<\/strong><\/strong><\/p>

(3) th\u1eed nghi\u1ec7m phun axetat gia t\u1ed1c mu\u1ed1i \u0111\u1ed3ng (th\u1eed nghi\u1ec7m CASS) l\u00e0 m\u1ed9t lo\u1ea1i th\u1eed nghi\u1ec7m \u0103n m\u00f2n phun mu\u1ed1i nhanh \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n g\u1ea7n \u0111\u00e2y \u1edf n\u01b0\u1edbc ngo\u00e0i. Nhi\u1ec7t \u0111\u1ed9 th\u1eed nghi\u1ec7m l\u00e0 50 \u2103, v\u00e0 m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf mu\u1ed1i \u0111\u1ed3ng clorua \u0111\u01b0\u1ee3c th\u00eam v\u00e0o dung d\u1ecbch mu\u1ed1i \u0111\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n m\u1ea1nh. T\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n c\u1ee7a n\u00f3 g\u1ea5p kho\u1ea3ng 8 l\u1ea7n so v\u1edbi th\u1eed nghi\u1ec7m c\u1ee7a NSS.<\/strong><\/strong><\/p>

(4) Th\u1eed nghi\u1ec7m phun mu\u1ed1i xen k\u1ebd l\u00e0 m\u1ed9t lo\u1ea1i th\u1eed nghi\u1ec7m phun mu\u1ed1i to\u00e0n di\u1ec7n, th\u1ef1c ch\u1ea5t l\u00e0 th\u1eed nghi\u1ec7m phun mu\u1ed1i trung t\u00ednh c\u1ed9ng v\u1edbi th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m kh\u00f4ng \u0111\u1ed5i. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu cho c\u00e1c s\u1ea3n ph\u1ea9m ki\u1ec3u khoang, th\u00f4ng qua s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt, s\u1ef1 \u0103n m\u00f2n phun mu\u1ed1i kh\u00f4ng ch\u1ec9 x\u1ea3y ra tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a s\u1ea3n ph\u1ea9m m\u00e0 c\u00f2n c\u1ea3 b\u00ean trong s\u1ea3n ph\u1ea9m. N\u00f3 lu\u00e2n phi\u00ean s\u1ea3n ph\u1ea9m trong m\u00f4i tr\u01b0\u1eddng phun mu\u1ed1i v\u00e0 n\u00f3ng \u1ea9m, v\u00e0 cu\u1ed1i c\u00f9ng ki\u1ec3m tra xem c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n v\u00e0 c\u01a1 h\u1ecdc c\u1ee7a to\u00e0n b\u1ed9 s\u1ea3n ph\u1ea9m c\u00f3 thay \u0111\u1ed5i hay kh\u00f4ng.<\/strong><\/strong><\/p>

K\u1ebft qu\u1ea3 ph\u00e1n \u0111o\u00e1n<\/strong><\/strong><\/h2>

K\u1ebft qu\u1ea3 c\u1ee7a th\u1eed nghi\u1ec7m phun mu\u1ed1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u01b0a ra \u1edf d\u1ea1ng \u0111\u1ecbnh t\u00ednh h\u01a1n l\u00e0 d\u1ea1ng \u0111\u1ecbnh l\u01b0\u1ee3ng. C\u00f3 b\u1ed1n ph\u01b0\u01a1ng ph\u00e1p ph\u00e1n \u0111o\u00e1n c\u1ee5 th\u1ec3.<\/strong><\/strong><\/p>

\u2460 Ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n lo\u1ea1i l\u00e0 chia ph\u1ea7n tr\u0103m di\u1ec7n t\u00edch \u0103n m\u00f2n tr\u00ean t\u1ed5ng di\u1ec7n t\u00edch th\u00e0nh nhi\u1ec1u c\u1ea5p theo m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p nh\u1ea5t \u0111\u1ecbnh v\u00e0 l\u1ea5y m\u1ed9t c\u1ea5p nh\u1ea5t \u0111\u1ecbnh l\u00e0m c\u01a1 s\u1edf \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng. N\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c m\u1eabu t\u1ea5m.<\/strong><\/strong><\/p>

\u2461 Ph\u01b0\u01a1ng ph\u00e1p c\u00e2n l\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u00e2n kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1eabu tr\u01b0\u1edbc v\u00e0 sau khi th\u1eed \u0103n m\u00f2n \u0111\u1ec3 t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng hao m\u00f2n \u0103n m\u00f2n nh\u1eb1m \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a m\u1eabu. N\u00f3 \u0111\u1eb7c bi\u1ec7t th\u00edch h\u1ee3p \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a m\u1ed9t kim lo\u1ea1i nh\u1ea5t \u0111\u1ecbnh.<\/strong><\/strong><\/p>

\u2462 Ph\u01b0\u01a1ng ph\u00e1p ph\u00e1n \u0111o\u00e1n ngo\u1ea1i h\u00ecnh \u0103n m\u00f2n l\u00e0 m\u1ed9t lo\u1ea1i ph\u01b0\u01a1ng ph\u00e1p ph\u00e1n \u0111o\u00e1n \u0111\u1ecbnh t\u00ednh. N\u00f3 \u0111\u00e1nh gi\u00e1 c\u00e1c m\u1eabu b\u1eb1ng c\u00e1ch xem c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 b\u1ecb \u0103n m\u00f2n sau khi th\u1eed nghi\u1ec7m \u0103n m\u00f2n phun mu\u1ed1i hay kh\u00f4ng. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y h\u1ea7u h\u1ebft \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m chung.<\/strong><\/strong><\/p>

\u2463 Ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch th\u1ed1ng k\u00ea d\u1eef li\u1ec7u \u0103n m\u00f2n cung c\u1ea5p ph\u01b0\u01a1ng ph\u00e1p thi\u1ebft k\u1ebf ki\u1ec3m tra \u0103n m\u00f2n, ph\u00e2n t\u00edch d\u1eef li\u1ec7u \u0103n m\u00f2n v\u00e0 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1eef li\u1ec7u \u0103n m\u00f2n. N\u00f3 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 \u0111\u1ebfm t\u00ecnh h\u00ecnh \u0103n m\u00f2n, thay v\u00ec x\u00e1c \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3.<\/strong><\/p>

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V\u00ed d\u1ee5: Th\u1eed nghi\u1ec7m phun mu\u1ed1i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9<\/strong><\/strong><\/h2>

Salt spray test, invented in the early 20th century, is the longest used “corrosion test”. It is favored by users of corrosion-resistant materials and has become a “universal” test. The main reasons are as follows: 1) saving time; 2) low cost; 3) testing a variety of materials; 4) the results are simple and clear, which is conducive to the settlement of commercial disputes.<\/strong><\/strong><\/p>

In practical application, the salt spray test of stainless steel is the most well-known – how many hours can this material be tested in salt spray? Practitioners must be familiar with this issue.<\/strong><\/strong><\/p>

C\u00e1c nh\u00e0 cung c\u1ea5p v\u1eadt li\u1ec7u th\u01b0\u1eddng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd th\u1ee5 \u0111\u1ed9ng ho\u1eb7c c\u1ea3i thi\u1ec7n m\u1ee9c \u0111\u1ed9 \u0111\u00e1nh b\u00f3ng b\u1ec1 m\u1eb7t \u0111\u1ec3 c\u1ea3i thi\u1ec7n th\u1eddi gian th\u1eed nghi\u1ec7m phun mu\u1ed1i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9. Nh\u01b0ng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng nh\u1ea5t l\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a ch\u00ednh th\u00e9p kh\u00f4ng g\u1ec9, t\u1ee9c l\u00e0 h\u00e0m l\u01b0\u1ee3ng crom, molypden v\u00e0 niken.<\/strong><\/strong><\/p>

H\u00e0m l\u01b0\u1ee3ng Cr v\u00e0 Mo c\u00e0ng cao th\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ed7 v\u00e0 \u0103n m\u00f2n k\u1ebd h\u1edf c\u00e0ng m\u1ea1nh. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng c\u00e1i g\u1ecdi l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng r\u1ed7 (tr\u01b0\u1edbc): pre = % Cr + 3,3 \u00d7 % mo.<\/strong><\/strong><\/p>

M\u1eb7c d\u00f9 niken kh\u00f4ng th\u1ec3 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a th\u00e9p \u0111\u1ed1i v\u1edbi v\u1ebft r\u1ed7 v\u00e0 v\u1ebft n\u1ee9t, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 sau khi qu\u00e1 tr\u00ecnh \u0103n m\u00f2n b\u1eaft \u0111\u1ea7u. Do \u0111\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 Austenit c\u00f3 ch\u1ee9a niken th\u01b0\u1eddng c\u00f3 hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n trong th\u1eed nghi\u1ec7m phun mu\u1ed1i, v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n c\u1ee7a n\u00f3 \u00edt h\u01a1n nhi\u1ec1u so v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 ferit niken th\u1ea5p c\u00f3 \u0111\u1ed9 \u0103n m\u00f2n r\u1ed7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/strong><\/strong><\/p>

Ki\u1ebfn th\u1ee9c nh\u1ecf: Ti\u00eau chu\u1ea9n 304, phun mu\u1ed1i trung t\u00ednh n\u00f3i chung l\u00e0 t\u1eeb 48-72 gi\u1edd; ti\u00eau chu\u1ea9n 316, phun mu\u1ed1i trung t\u00ednh n\u00f3i chung l\u00e0 t\u1eeb 72-120 gi\u1edd.<\/strong><\/strong><\/p>

C\u1ea7n ch\u1ec9 ra r\u1eb1ng th\u1eed nghi\u1ec7m phun mu\u1ed1i c\u00f3 nh\u1eefng khi\u1ebfm khuy\u1ebft \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c ki\u1ec3m tra t\u00ednh n\u0103ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9. Trong th\u1eed nghi\u1ec7m phun mu\u1ed1i, h\u00e0m l\u01b0\u1ee3ng clorua c\u1ee7a mu\u1ed1i phun r\u1ea5t cao, v\u01b0\u1ee3t xa m\u00f4i tr\u01b0\u1eddng th\u1ef1c, v\u00ec v\u1eady th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 ch\u1ed1ng \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf v\u1edbi h\u00e0m l\u01b0\u1ee3ng clorua r\u1ea5t th\u1ea5p c\u0169ng s\u1ebd b\u1ecb \u0103n m\u00f2n trong th\u1eed nghi\u1ec7m phun mu\u1ed1i.<\/strong><\/strong><\/p>

Th\u1eed nghi\u1ec7m phun mu\u1ed1i thay \u0111\u1ed5i h\u00e0nh vi \u0103n m\u00f2n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9. N\u00f3 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t b\u00e0i ki\u1ec3m tra gia t\u1ed1c ho\u1eb7c m\u1ed9t b\u00e0i ki\u1ec3m tra m\u00f4 ph\u1ecfng. K\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t chi\u1ec1u v\u00e0 kh\u00f4ng c\u00f3 m\u1ed1i quan h\u1ec7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng.<\/strong><\/strong><\/p>

V\u00ec v\u1eady, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u1eed nghi\u1ec7m phun mu\u1ed1i \u0111\u1ec3 so s\u00e1nh kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c nhau, nh\u01b0ng th\u1eed nghi\u1ec7m n\u00e0y ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0a ra \u0111\u00e1nh gi\u00e1 v\u1eadt li\u1ec7u. Khi l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u th\u00e9p kh\u00f4ng g\u1ec9, th\u1eed nghi\u1ec7m phun mu\u1ed1i m\u1ed9t m\u00ecnh th\u01b0\u1eddng kh\u00f4ng th\u1ec3 cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin, v\u00ec ch\u00fang ta thi\u1ebfu hi\u1ec3u bi\u1ebft \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m v\u00e0 m\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/strong><\/strong><\/p>

V\u00ec l\u00fd do t\u01b0\u01a1ng t\u1ef1, kh\u00f4ng th\u1ec3 \u01b0\u1edbc t\u00ednh tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng c\u1ee7a s\u1ea3n ph\u1ea9m ch\u1ec9 d\u1ef1a tr\u00ean th\u1eed nghi\u1ec7m phun mu\u1ed1i \u0111\u1ed1i v\u1edbi c\u00e1c m\u1eabu th\u00e9p kh\u00f4ng g\u1ec9.<\/strong><\/strong><\/p>

Ngo\u00e0i ra, kh\u00f4ng th\u1ec3 so s\u00e1nh c\u00e1c lo\u1ea1i th\u00e9p kh\u00e1c nhau, v\u00ed d\u1ee5, ch\u00fang ta kh\u00f4ng th\u1ec3 so s\u00e1nh th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 th\u00e9p cacbon ph\u1ee7, b\u1edfi v\u00ec c\u01a1 ch\u1ebf \u0103n m\u00f2n c\u1ee7a hai v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong th\u1eed nghi\u1ec7m l\u00e0 kh\u00e1 kh\u00e1c nhau, v\u00e0 m\u1ed1i t\u01b0\u01a1ng quan gi\u1eefa k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf cu\u1ed1i c\u00f9ng c\u0169ng kh\u00e1c nhau.<\/strong><\/strong><\/p><\/div>","protected":false},"excerpt":{"rendered":"

Corrosion is the destruction or deterioration of materials or their properties under the action of environment. Most of the corrosion occurs in the atmosphere, which contains oxygen, humidity, temperature changes and pollutants. Salt spray corrosion is one of the most common and destructive atmospheric corrosion. The corrosion of metal surface caused by salt spray is…<\/p>","protected":false},"author":2,"featured_media":20365,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-20363","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2021\/02\/u10873944523732270684fm26gp0.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/20363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=20363"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/20363\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/20365"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=20363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=20363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=20363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}