Hauv cov txheej txheem kev lag luam, cov cuab yeej yog qhov tseem ceeb rau kev saib xyuas thiab tswj ntau yam tsis zoo, ua kom muaj kev nyab xeeb thiab ruaj khov ntawm kev ua haujlwm. Txawm li cas los xij, dhau sijhawm, cov cuab yeej no, ntsia rau ntawm cov kav dej thiab cov khoom siv ntau lawm, tuaj yeem cuam tshuam los ntawm cov xov xwm corrosive. Qhov no tsis yog tsuas yog txo lawv cov kev ua tau zoo thiab kev ntseeg tau tab sis kuj tuaj yeem ua rau muaj teeb meem loj xws li xau, ua rau muaj kev pheej hmoo ntawm kev tsim khoom. Thaum koj pom ib qho ntawm cov cim hauv qab no, koj cov khoom siv lossis cov kav dej yuav xa tuaj rau koj ceeb toom txog kev xeb.
1. Pitting Corrosion: Qhov me me thiab qhov deterioration
Yog tias koj saib cov me me, pit-zoo li me me rau ntawm cov hlau saum npoo, lossis yog tias muaj kev hloov pauv ntawm corrosion (piv txwv li xiav, ntsuab), nws tuaj yeem qhia cov kiav txhab. Hom kev xeb no yog qhov chaw hauv cheeb tsam, feem ntau pib ntawm qhov chaw tsis xws luag, protruding inclusions, los yog hlau lis ciam teb. Txij li thaum pitting corrosion tuaj yeem nkag mus rau hauv qab ntawm qhov chaw thiab feem ntau them los ntawm cov khoom siv corrosion, nws yog qhov nyuaj rau kev ntes. Cov cuab yeej tsis ua haujlwm feem ntau tshwm sim raws li ib lossis ntau dua corrosion perforations, tsis tshua muaj kev puas tsuaj tag.
2. Kev ntxhov siab Corrosion Cracking: Cracks thiab deformation
Thaum cov kab nrib pleb tshwm nyob rau saum npoo los yog hauv cov ntaub ntawv hlau, feem ntau txuas mus rau qhov kev taw qhia ntawm kev ntxhov siab thiab qhia cov yam ntxwv ntawm cov pob txha tawg, lossis yog tias koj pom kev nyuaj siab hauv zos lossis qhov tob ntawm qhov sib txawv, cov no tuaj yeem yog cov cim ntawm kev ntxhov siab corrosion cracking (SCC). Austenitic stainless hlau, thaum raug rau ib puag ncig uas muaj chloride ions, tuaj yeem ntsib cov tshuaj chloride-induced stress corrosion cracking (CISCC). Qhov no tshwm sim ntawm qhov kub siab tshaj 54-79 degree, tshwj xeeb tshaj yog nyob rau hauv qis pH lossis oxygenated ib puag ncig, txawm tias muaj cov tshuaj chloride. Qhov no feem ntau ua rau transgranular cracking, tab sis intergranular cracking kuj tuaj yeem tshwm sim.
3. Hydrogen Embrittlement: Surface Blisters thiab Cracks
Yog tias koj pom ntau cov hlwv me me ntawm cov hlau saum npoo, nws yuav yog vim atomic hydrogen diffusing rau hauv cov hlau thiab ua rau hauv cov voids, inclusions, los yog non-metallic inclusions. Qhov kev nthuav dav ntawm cov khoom siv hydrogen nws thiaj li ua rau cov phab ntsa sib cais thiab pom pom blistering ntawm cov hlau nto. Cov pob txha tawg nyob rau hauv thaj tsam ntawm thaj tsam ntawm cov hlau, nws yuav ua rau tawg, thiab qhov tsis sib xws ntawm cov pits thiab qhov nyob hauv thaj tsam ntawm thaj tsam lis kuj yog qhov ntsuas. Cov tsos mob no yuav qhia tau tias muaj kev cuam tshuam ntawm intergranular corrosion.
4. Galvanic Corrosion: Electrochemical Reactions thiab Degradation degradation
Thaum koj saib cov tshuaj electrochemical ntawm cov hlau nto, xws li npuas tsim los yog oxidation / txo cov tshuaj tiv thaiv, los yog thaum lub zos corrosion zoo li lub qhov los yog qhov tshwm sim, nws yuav yog vim galvanic corrosion. Qhov no tuaj yeem ua rau cov hlau nto corrode, hnav, lossis etch, ua rau roughness lossis tsis sib xws, uas tuaj yeem txo qis lossis nce siab poob.
5. Rwb thaiv tsev tsis ua haujlwm Corrosion: Qhov kub thiab txias tsis zoo
Ib qho txawv txav los yog poob ntawm qhov kub thiab txias sab nraud ntawm cov khoom siv lossis cov kav dej, qhov sib txawv ntawm qhov kub thiab txias piv rau cov cheeb tsam ib puag ncig, dents, tawg, los yog tev nyob rau hauv lub rwb thaiv tsev txheej, los yog cov cim ntawm cov kua los yog roj to, yuav qhia tau hais tias corrosion nyob rau hauv rwb thaiv tsev (CUI) . Tsis tas li ntawd, kev hloov pauv ntawm cov khoom siv lossis cov kav dej, xws li kev hloov xim, qhov roughness, lossis oxidation, yog cov cim tseem ceeb. Tseem ceeb deformation nyob rau hauv kev ntxhov siab, zoo li hnyav sagging ntawm cov hlab cua sov, feem ntau yog vim creep puas.
Xaus
Corrosion tuaj yeem sib txawv nyob ntawm seb hom hlau, qhov kub thiab txias, thiab ib puag ncig yam. Yog li ntawd, thaum ua cov kev ntsuam xyuas corrosion, nws yog ib qho tseem ceeb uas yuav tsum tau siv kev sib xyaw ua ke ntawm cov kev soj ntsuam thiab cov txheej txheem kev sim los ua qhov kev ntsuam xyuas dav.
Txhawm rau tiv thaiv corrosion ntawm kev ntsuas ntsuas, peb yuav tsum tau them sai sai rau qhov raug xaiv cov khoom siv thiab cov khoom siv, kev teeb tsa & kev saib xyuas.
Raws li cov chaw tsim khoom ntawm lub siab, qib, ntws sensors, thiab ntws ntsuas, peb cov khoom tsim los tiv thaiv kev lag luam hnyav, suav nrog cov uas pheej hmoo rau corrosion.
Yog tias koj tsis paub yuav ua li cas xaiv cov khoom tsim nyog nrog cov ntaub ntawv tsim nyog, peb cov engineers zoo siab los pab txo kev pheej hmoo, ua kom muaj kev nyab xeeb thiab ua haujlwm ntev. Tiv tauj peb hnub nontawm no.