Anti-corrosion coatings feem ntau muab faib ua cov pa tshuaj tiv thaiv corrosion thiab hnyav-tiv thaiv corrosion coatings, uas yog ib qho tseem ceeb ntawm cov txheej txheem ntawm cov xim pleev xim.Cov pa roj carbon monoxide coatings ua lub luag haujlwm tiv thaiv corrosion ntawm cov hlau nyob rau hauv cov xwm txheej dav dav thiab tiv thaiv kev pab cuam lub neej ntawm cov hlau tsis muaj hlau;Lub luag haujlwm hnyav los tiv thaiv corrosion coatings yog piv rau cov pa anti-corrosion txheej, uas tuaj yeem siv rau hauv ib puag ncig hnyav corrosive thiab muaj peev xwm los ua ib hom tshuaj tiv thaiv corrosion uas ua tiav lub sijhawm tiv thaiv ntev dua li cov txheej txheem los tiv thaiv corrosion.Lub hauv paus ntsiab lus ntawm kev tiv thaiv corrosion ntawm cov txheej txheem tiv thaiv corrosion yog nyob rau hauv cov kev taw qhia ntawm chemistry, physics thiab electrochemistry.Cov hauv qab no yog cov lus piav qhia ntxaws:
1. Lub hauv paus ntsiab lus tshuaj tiv thaiv corrosion
Lub hauv paus ntsiab lus tshuaj ntawm kev tiv thaiv corrosion yog kom tsis txhob muaj teeb meem acid-puag khoom rau hauv nruab nrab thiab tsis muaj teeb meem tshuaj los tiv thaiv cov ntaub ntawv hauv cov txheej txheem los tiv thaiv corrosion los ntawm cov khoom corrosive.Qee cov tshuaj amphoteric, xws li txhuas hydroxide, barium hydroxide thiab zinc oxide, feem ntau ntxiv rau cov txheej tiv thaiv xeb.Cov tshuaj no tuaj yeem yooj yim ua rau cov kua qaub thiab alkali teeb meem kom ua tiav cov teebmeem tiv thaiv corrosion.
2. Lub hauv paus ntsiab lus ntawm kev tiv thaiv corrosion
Lub hauv paus ntsiab lus ntawm kev tiv thaiv corrosion yog cais cov khoom tiv thaiv los ntawm cov khoom corrosive sab nraud nrog cov txheej tiv thaiv corrosion.Lub cev lub ntsiab cai ntawm anti-xeb xim yog siv ib tug zaj duab xis-txoj kev neeg sawv cev kom tau ib tug tuab anti-xeb txheej cais tawm cov kev puas tsuaj ntawm cov anti-xeb ntxim rau cov kev tiv thaiv ntaub ntawv.Piv txwv li, cov xim muaj hlau lead thiab cov roj tuaj yeem tsim cov hmoov txhuas los xyuas kom cov txheej txheem tiv thaiv corrosion ntawm qhov ntom.
3. Cov nyhuv electrochemical ntawm kev tiv thaiv corrosion
Cov nyhuv electrochemical ntawm kev tiv thaiv corrosion yog hais txog qhov sib ntxiv ntawm qee yam tshwj xeeb rau cov xim pleev xim, yog li ntawd thaum ya raws thiab oxygen dhau los ntawm cov xim pleev xim, lawv yuav hnov mob tsim los tiv thaiv corrosion ions, passivating saum npoo. hlau xws li hlau, thiab yog li tiv thaiv hlau ions.Kev tawg, kom ua tiav lub hom phiaj ntawm kev tiv thaiv corrosion, feem ntau ntawm cov khoom tshwj xeeb no yog chromate.
Daim ntawv thov thaj chaw ntawm cov tshuaj tiv thaiv corrosion feem ntau suav nrog tsib yam hauv qab no:
① Kev tsim tawm sab nrauv: kev teeb tsa hauv ntug dej hiav txwv, cov qauv ntawm ntug hiav txwv thiab bay, offshore roj drilling platforms;
②Tam sim no kev thauj mus los: kev loj guardrails, txuas hniav, nkoj, ntim, tsheb ciav hlau thiab railway chaw, tsheb, tshav dav hlau chaw;
③ Kev lag luam hluav taws xob: cov khoom siv hydraulic, cov dej tso tsheb hlau luam, cov roj tso tsheb hlau luam, cov khoom siv roj av refining, cov khoom siv roj av (cov kav dej, cov roj tso tsheb hlau luam), cov khoom siv hluav taws xob thiab kev hloov pauv, hluav taws xob nuclear, cov mines;
④ Cov tuam txhab lag luam loj: cov khoom siv papermaking, khoom siv kho mob, khoom noj khoom haus thiab tshuaj lom neeg, sab hauv thiab sab nrauv phab ntsa ntawm cov thawv hlau, cov kav dej, cov chaw cia khoom ntawm cov tshuaj, steel, petrochemical nroj tsuag, mining thiab smelting, cement cog khoom, pem teb, phab ntsa, thiab cov cement Cheebtsam nrog corrosive media;
⑤ Cov chaw hauv nroog: cov kav dej roj thiab lawv cov chaw (xws li lub tank roj), cov kav dej nkev, cov dej haus, cov khoom siv pov tseg, thiab lwm yam.
Post lub sij hawm: Dec-07-2021