Corrosion qauv ntawm cov hlau feem ntau tuaj yeem muab faib ua ob pawg: kev txhim kho corrosion thiab hauv zos corrosion.Thiab cov kev txhim kho hauv zos tuaj yeem muab faib ua: pitting corrosion, crevice corrosion, galvanic coupling corrosion, intergranular corrosion, xaiv corrosion, kev nyuaj siab corrosion, corrosion qaug zog thiab hnav corrosion.
Comprehensive corrosion yog characterized los ntawm corrosion uniformly faib nyob rau hauv lub nto ntawm cov hlau, thiaj li hais tias cov hlau zuag qhia tag nrho thinning.Kev txhim kho corrosion tshwm sim nyob rau hauv cov xwm txheej uas qhov nruab nrab corrosive tuaj yeem ncav cuag txhua qhov chaw ntawm cov hlau saum npoo tsis sib xws, thiab cov khoom sib xyaw thiab cov koom haum ntawm cov hlau kuj zoo ib yam.
Pitting corrosion, tseem hu ua lub qhov me me corrosion, yog ib hom corrosion concentrated nyob rau hauv ib tug heev me me ntawm cov hlau nto thiab tob rau hauv cov hlau nrog pore zoo li corrosion qauv.
Pitting corrosion tej yam kev mob feem ntau ua tau raws li cov khoom, nruab nrab thiab electrochemical tej yam kev mob:
1, pitting feem ntau tshwm sim nyob rau hauv qhov yooj yim passivation ntawm cov hlau nto (xws li stainless hlau, txhuas) los yog nto ntawm cov hlau nrog cathodic plating.
2, pitting tshwm sim nyob rau hauv lub xub ntiag ntawm tshwj xeeb ions, xws li halogen ions nyob rau hauv nruab nrab.
3, pitting corrosion tshwm sim nyob rau hauv ib qho tseem ceeb muaj peev xwm saum toj no, hu ua pitting peev xwm los yog rupture peev xwm.
Intergranular corrosion yog cov khoom siv hlau nyob rau hauv ib qho nruab nrab corrosive raws li cov khoom siv lis ciam teb los yog lis ciam ze ntawm qhov corrosion, thiaj li ua rau poob ntawm kev sib txuas ntawm cov nplej ntawm qhov tshwm sim corrosion.
Kev xaiv corrosion yog hais txog cov khoom siv ntau dua nyob rau hauv ntau yam alloys nyiam yaj, cov txheej txheem no yog tshwm sim los ntawm qhov sib txawv ntawm electrochemical hauv cov khoom alloy.
Crevice corrosion yog lub xub ntiag ntawm electrolyte ntawm cov hlau thiab hlau thiab hlau thiab cov hlau tsis yog hlau ua qhov sib txawv nqaim, qhov kev txav ntawm qhov nruab nrab yog thaiv thaum lub xeev corrosion hauv zos.
Qhov tsim ntawm crevice corrosion:
1, kev sib txuas ntawm cov khoom siv sib txawv.
2, nyob rau hauv cov hlau nto ntawm deposits, attachments, txheej thiab lwm yam corrosion khoom muaj nyob.
Lub sij hawm xa tuaj: Mar-15-2024