Dab tsi yogcorrosion ntawm filiform
Filiform corrosion (FFC), tseem hu ua underfilm corrosion, yog ib hom corrosion uas tshwm sim nyob rau hauv coated hlau, feem ntau nyob rau hauv cov organic coatings xws li xim. Nws zoo nkaus li me me, zoo li worm-zoo li filaments nyob rau saum npoo ntawm cov hlau, thiab kis tau nyob rau hauv ib qho kev tiv thaiv txheej los yog xim zaj duab xis, uas tuaj yeem ua rau cov txheej txheem ua tsis tiav thiab nthuav tawm cov hlau hauv qab mus ntxiv corrosion.
Filiform corrosion yog pib los ntawm kev nkag mus ntawm noo noo thiab oxygen los ntawm kev puas tsuaj los yog ntxeem tau txheej, uas ua rau lub zoo meej ib puag ncig rau corrosion tshwm sim. Cov txheej txheem corrosion pib ntawm qib microscopic thiab tuaj yeem sib kis tau sai, ua rau muaj kev puas tsuaj loj rau saum npoo ntawm cov hlau.
Hom corrosion no feem ntau pom nyob rau hauv marine ib puag ncig, qhov twg cov dej ntsev thiab cov av noo ntau. Nws kuj tuaj yeem tshwm sim hauv thaj chaw uas muaj cov pa phem ntau, xws li thaj chaw muaj kev lag luam thiab hauv nroog.
Txhawm rau tiv thaiv lossis txo qis filiform corrosion, nws yog ib qho tseem ceeb uas yuav tsum tau siv cov txheej txheem zoo rau cov hlau uas muaj kev tiv thaiv zoo tiv thaiv ya raws thiab oxygen nkag mus. Tsis tas li ntawd, kev saib xyuas tsis tu ncua thiab tshuaj xyuas ntawm cov chaw coated tuaj yeem pab txheeb xyuas thiab daws txhua yam teeb meem ua ntej lawv hnyav dua.
Zuag qhia tag nrho, filiform corrosion yog ib hom kev xeb uas tuaj yeem ua rau cov hlau tsis zoo yog tias tsis kho. Nws yog ib qho tseem ceeb kom nkag siab thiab txheeb xyuas cov cim ntawm filiform corrosion los tiv thaiv kev puas tsuaj ntxiv thiab ua kom lub neej ntev ntawm cov hlau nto.
Cov yam ntxwv cuam tshuam ntawm filiformcorrosion
Filiform corrosion feem ntau yog tshwm sim los ntawm kev npaj tsis txaus ntawm cov hlau nto ua ntej siv txheej, uas tso cai rau cov dej noo nkag mus rau txheej txheej thiab ua rau cov hlau nto. Cov tshuaj tiv thaiv no tsim cov hlau oxide, uas rhuav tshem cov txheej thiab ua rau filiform corrosion. Lwm yam tseem ceeb uas tuaj yeem ua rau muaj kev txhim kho filiform corrosion xws li raug dej ntsev, acidic lossis alkaline ib puag ncig, cov av noo siab, thiab kub siab.
- Cov av noo yog ib qho tseem ceeb uas cuam tshuam rau FFC. Cov av noo siab tuaj yeem ua rau muaj qhov tshwm sim ntawm FFC. Lub xub ntiag ntawm noo noo ntawm cov hlau nto yog qhov tseem ceeb rau kev pib ntawm FFC. Cov dej noo kuj tuaj yeem tsim kom muaj qhov chaw muaj pa oxygen uas tuaj yeem ua kom cov txheej txheem corrosion. Yog li ntawd, tswj cov av noo nyob ze ntawm cov hlau saum npoo yog qhov tseem ceeb hauv kev tiv thaiv FFC.
- Kub yog lwm yam tseem ceeb uas cuam tshuam rau FFC. FFC feem ntau tshwm sim ntawm qhov kub thiab txias. Ntawm qhov kub siab, cov txheej txheem ntawm cov hlau tuaj yeem o tuaj yeem ua rau cov kab nrib pleb thiab qhov tsis xws luag hauv txheej thiab tso cai rau cov dej noo thiab lwm yam corrosive nkag mus rau saum npoo. Yog li ntawd, kev saib xyuas qhov kub ntawm ib puag ncig ntawm qhov chaw hlau yog qhov tseem ceeb hauv kev tiv thaiv FFC. Kev sib koom ua ke ntawm qhov kub thiab av noo ntawm kev sib cuam tshuam ntawm filiform corrosion yog qhov tseem ceeb tshaj qhov cuam tshuam ntawm ib qho av noo, nrog kub 40 degree, txheeb ze av noo 70 feem pua thiab kub yog 20 degree, txheeb ze av noo 95 feem pua ob ua ke ntawm filiform corrosion ib puag ncig yog tsim. rau qhov tsim nyog tshaj plaws.
- Cov ntsiab lus oxygen hauv ib puag ncig ib puag ncig kuj ua lub luag haujlwm tseem ceeb hauv FFC. Corrosion yog txheej txheem electrochemical uas yuav tsum muaj cov pa oxygen molecules. Ib qho dhau ntawm cov pa oxygen molecules hauv ib puag ncig ib puag ncig tuaj yeem ua kom tus nqi ntawm FFC. Atmospheric oxygen cov ntsiab lus (21 feem pua) feem ntau suav tias yog qhov qis tshaj plaws rau filamentous corrosion. Filiform corrosion yog qhov zoo tshaj plaws los ntawm cov ntsiab lus oxygen ntawm li 50 feem pua. Cov kev tshawb fawb qhia tau hais tias filamentous corrosion tuaj yeem nrawm nrawm thaum cov ntsiab lus oxygen nce mus rau ntau dua 35 feem pua. Kev siv cov roj inert nyob rau hauv cov huab cua nyob ib ncig ntawm cov hlau nto tuaj yeem pab tiv thaiv FFC los ntawm kev txo qis cov pa oxygen hauv ib puag ncig.
- Txheej txheej kuj tseem ceeb rau kev tiv thaiv FFC. Cov txheej txheej tsis zoo, xws li cov uas muaj cov hnab ntim cua, tuaj yeem tso cov dej noo nkag mus rau saum npoo, ua rau corrosion. Cov txheej uas muaj qhov ntxeem tau dhau los lossis tuab dhau tuaj yeem ua rau muaj qhov ua rau FFC. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xaiv cov txheej txheem uas muaj kev tiv thaiv zoo rau FFC thiab xyuas kom meej tias cov txheej txheem siv tau raug.
- Thaum kawg, kev kho hlau saum npoo tuaj yeem cuam tshuam kev tiv thaiv FFC. Kev npaj deg, xws li ntxuav thiab tshem tawm cov kab mob ua ntej txheej, tuaj yeem tiv thaiv FFC. Kev kho tshuaj kuj tuaj yeem siv los tsim kev thaiv ntawm cov hlau nto thiab txheej, tiv thaiv cov dej noo thiab lwm yam corrosive los ntawm kev nkag mus rau saum npoo.
Hauv kev xaus, ntau yam cuam tshuam rau qhov tshwm sim ntawm FFC, suav nrog qhov kub thiab txias, av noo, cov ntsiab lus oxygen, txheej txheej, thiab kev kho cov hlau. Los ntawm kev ua raws li kev tswj hwm ib puag ncig kom zoo, xaiv cov txheej txheem zoo, thiab ua cov txheej txheem hlau zoo, FFC tuaj yeem tiv thaiv.
Filiform Accelerate Test Chamber
Filiform Accelerated Tester
NrogFiliform Accelerate Test Chamberthiab Filiform Accelerated Tester, koj tuaj yeem kuaj qhov kev loj hlob ntawm FFC ntawm qhov sib txawv ntawm qhov kub, av noo thiab ntsev ntau.
Kev lag luam feem ntau cuam tshuam los ntawm Filiform Corrosion
Kev lag luam marine feem ntau cuam tshuam los ntawm filiform corrosion, ntau lub nkoj tau coated nrog cov xim thiab raug rau cov dej ntsev thiab lwm qhov chaw corrosive. Txawm li cas los xij, lwm qhov kev lag luam uas siv cov hlau coated, xws li tsheb thiab aerospace, kuj tuaj yeem cuam tshuam los ntawm filiform corrosion.
Yuav tiv thaiv Filiform Corrosion li cas
Txhawm rau tiv thaiv filiform corrosion, kev npaj kom zoo yog qhov tseem ceeb. Cov hlau saum npoo yuav tsum tau ntxuav kom huv si thiab tag nrho cov xeb, nplai, thiab lwm yam kab mob yuav tsum tau muab tshem tawm ua ntej txheej txheej. Tsis tas li ntawd, kev siv cov primers zoo thiab coatings tsim los tiv thaiv corrosion tuaj yeem pab tiv thaiv filiform corrosion.
Kev tshuaj xyuas tsis tu ncua ntawm cov hlau coated kuj tseem ceeb heev kom cov cim qhia ntawm filiform corrosion tuaj yeem raug txheeb xyuas ntxov thiab daws teeb meem ua ntej lawv dhau los ua teeb meem loj. Yog tias filiform corrosion raug txheeb xyuas, nws tuaj yeem kho los ntawm kev xuab zeb, tu, thiab rov txheej nrog cov txheej txheem zoo corrosion-resistant.
Hauv kev xaus, filiform corrosion yog ib qho teeb meem loj uas tuaj yeem ua rau muaj kev puas tsuaj loj rau cov hlau coated. Kev npaj saum npoo kom zoo, siv cov primers zoo thiab coatings, thiab kev tshuaj xyuas tsis tu ncua tuaj yeem pab tiv thaiv hom kev xeb ntawm qhov tshwm sim thiab xyuas kom meej tias cov hlau coated tseem tiv thaiv tau ntev. Los ntawm kev siv cov kev tiv thaiv no, kev lag luam uas tso siab rau cov hlau coated tuaj yeem zam qhov tsis zoo ntawm filiform corrosion thiab tswj lawv cov khoom siv, tsheb, thiab cov qauv hauv qhov zoo.
