Kev faib tawm ntawm kev txhim kho cov ntaub ntawv hlau

Lub hom phiaj ntawm kev faib cov khoom hauv cov hlau yog kom nkag siab zoo dua cov kev cai ntawm corrosion. Txawm li cas los xij, vim qhov nyuaj ntawm cov tshwm sim ntawm cov xwm txheej ntawm kev xeb, muaj ntau txoj hauv kev rau kev txo corrosion, uas tseem tsis tau koom ua ke. Feem ntau, kev coj tus cwj pwm thiab cov kev tswj hwm tau tuaj yeem ua haujlwm raws li kev sib txawv ntawm cov kev sib txawv, thiab cov yam ntxwv ntawm cov txheej txheem corrosion.

Qhov dav tau txais kev qhia dav dav ntawm cov ntaub ntawv dorrosion tam sim no suav nrog 8 pawg hauv qab no:
(1) kev sib xyaw ua xeb lossis kev txhim kho corrosion: corrosion yog tusyees faib thoob plaws tag nrho cov hlau nto. Txawm hais tias hom corrosion no yog qhov zoo tshaj plaws los ntawm kev pom kev zoo, nws cov kev tsim txom yog tswj tau los ntawm kev ua kom zoo nkauj. Ntev npaum li tus nqi corrosion yog txiav txim siab los ntawm kev sim, kev pub rau xeb tuaj yeem yeem tshwj tseg hauv kev tsim qauv kom ntseeg tau tias kev nyab xeeb.
(2) galvanic corrosion lossis bimetallic corrosion: thaum ob coc electrode tej peev xwm tuaj rau hauv kev tiv thaiv corrosive, thaum cov hlau nrog lub peev xwm zoo yog tiv thaiv los ntawm kev tiv thaiv cathhodic.
(3) Gap corrosion: Hauv cov cheeb tsam xws li cov khoob hauv cov qauv hlau, lossis cov kev daws teeb meem tseem ceeb, ua kom nrawm hauv plab corrosion. Hom corrosion no muaj ntau nyob rau hauv Flange kev sib txuas, xov fasteners, thiab lwm thaj chaw.
(4) qhov me me corrosion (pitting): Nws yog qhov ua kom haum ntawm kev corrosion, tus cwj pwm los ntawm kev tsim ntawm cov hlau sab me me, uas tuaj yeem tsim kev puas tsuaj loj. Pore ​​corrosion feem ntau tshwm sim hauv kev tawm xov xwm tshwj xeeb xws li chloride ions, thiab muaj kev zais thiab kev zais.
(5) Kev Corrosion: Corrosion tshwm sim raws cov ciaj ciam nplej, ua rau cov khoom lag luam ntse hauv cov khoom siv neeg kho tshuab, thaum lub ntsej muag tsis tuaj yeem pom cov kev hloov pauv loj. Feem ntau pom nyob rau hauv cov ntaub ntawv xws li stainless hlau lossis txhuas alloy tom qab kev kho cua sov nyob rau hauv kev siv kub.
(6) Kev xaiv corrosion: ntau cov neeg nquag ua haujlwm hauv lub alloy yaj ntawm tooj liab txhuas, ua rau muaj kev hloov pauv ntawm cov khoom qub thiab tseem ceeb ntawm nws cov khoom siv neeg.
(7) Hnav thiab corrosion: raws li kev sib xyaw ua ke ntawm kev tawm tswv yim ntawm corrosive media thiab cov khoom hnav, cov khoom saum toj tsis muaj kev puas tsuaj nrawm. Feem ntau pom nyob rau hauv dej cov khoom siv xws li twj tso kua mis xws li twj tso kua mis, li qub, thiab cov kav dej, nws yog cov txiaj ntsig croadgistic, nws yog cov kua hluav taws xob thiab kua yaig.
(8) Kev ntxhov siab corrosion tawg: raws li kev sib xyaw ua ke ntawm cov xov xwm kev ntxhov siab thiab cov kab nrib pleb, feem ntau ua rau muaj kev ntxhov siab hauv qab no tau lees lub zog, uas yog kev rhuav tshem.

Ntxiv rau kev faib tawm los ntawm morphology, corrosion kuj tseem tuaj yeem raug cais tawm ntawm lwm qhov ntev. Raws li qhov chaw nyob, nws tuaj yeem muab faib ua kev txhim kho thiab kev txhim kho corrosion thiab hauv nroog; Raws li kev thaj chaw hauv corrosive, nws tuaj yeem muab faib ua cov tshuaj tsis huv, kev txhim kho cov dej, thiab av hauv av, thiab hauv av; Raws li cov txheej txheem, nws tuaj yeem muab faib ua cov tshuaj corrosion, electrochemical corrosion, thiab corrosion lub cev.

Nws yog tsim nyog sau tseg tiasTitaniumThiab nws cov alloy ua rau muaj kev tiv thaiv corrosion zoo tshaj nyob rau hauv ntau hom kev ua xeb ib puag ncig tau hais los saud. Titanium tuaj yeem tsim cov yeeb yaj kiab tuab thiab pleev xim heev (feem ntau yog kho tus kheej kho tau sai sai tom qab kev puas tsuaj sai sai. Yog li ntawd, titanium tau ua tau zoo heev rau kev ua xeb, pitting corrosion, thiab crevice corrosion, thiab crevice corrosion, thiab cov dej hiav txwv, chloride ib puag ncig, thiab ntau cov acids thiab alkalis. Tsis tas li ntawd, Titanium tseem muaj zog tsis txaus siab rau kev ntxhov siab corrosion tawg, tshwj xeeb tshaj yog qhov tshwj xeeb tshaj yog cov hlau tsis muaj roj hlau thiab aluminium aluminium hauv chloride ion ib puag ncig. Txawm li cas los xij, raws li titanium yog ib qho cuab yeej siv coranium, nws yuav corrode hauv qee qhov chaw oxiding ib puag ncig (xws li muaj kev pheej hmoo ntawm hydrogen embrittlement. Yog li ntawd, hauv cov ntawv thov tshwj xeeb, nws tseem tsim nyog los xaiv thiab ntsuas cov ntaub ntawv tsim nyog raws li cov xwm txheej nruab nrab.

Txawm hais tias cov txheej txheem corrosion uas twb muaj lawm tseem tsis tau siv zog, lawv tau ua kom muaj cov kws tshaj lij thiab cov tswv yim morposational, yog li kom muaj cov tswv yim tiv thaiv corrosion thiab tswj hwm.