Corrosion mapatani emasimbi anogona kazhinji kupatsanurwa muzvikamu zviviri: kuzara uye ngura yenzvimbo.Uye ngura yemuno inogona kukamurwa kuita: gomba corrosion, crevice corrosion, galvanic coupling corrosion, intergranular corrosion, selective corrosion, stress corrosion, corrosion kuneta uye kupfeka ngura.
Comprehensive ngura inoratidzirwa ngura zvakafanana rakakamurwa pamusoro pesimbi, kuti simbi zvachose kutetepa.Comprehensive corrosion inoitika pasi pemamiriro ekuti iyo inopisa svikiro inogona kusvika kumativi ese esimbi yepasi zvakafanana, uye kuumbwa uye kurongeka kwesimbi kwakafanana.
Pitting corrosion, inozivikanwawo segomba diki corrosion, imhando yekuora yakanyudzwa muchikamu chidiki chesimbi uye yakadzika mukati mesimbi yemukati pore-senge corrosion pateni.
Pitting corrosion mamiriro anowanzo kusangana nezvinhu, zvepakati uye electrochemical mamiriro:
1, gomba rinowanzoitika mukupfuura kuri nyore kwesimbi (senge simbi isina tsvina, aluminium) kana pamusoro pesimbi ine cathodic plating.
2, kupinza kunoitika pamberi peakakosha ions, senge halogen ions mukati mepakati.
3, kukora kwegomba kunoitika mune chaiyo yakakosha mukana uri pamusoro, unonzi mukana wegomba kana kuputika kunogona.
Intergranular corrosion isimbi mune imwe nzira inoodza padivi pemiganho yezviyo kana miganhu yezviyo pedyo nekuora, kuitira kuti kurasikirwa kwekubatana pakati pezviyo zvechiitiko chekuora.
Selective corrosion inoreva izvo zvinonyanya kushanda muzvikamu zvakawanda zvakanyungudutswa, izvi zvinokonzerwa nekusiyana kwe electrochemical muzvikamu zvealloy.
Crevice corrosion ndiko kuvapo kwe electrolyte pakati pesimbi nesimbi uye simbi uye isiri-simbi inoumba mukaha wakamanikana, kutama kwepakati kunovharika kana inzvimbo yekuora.
Kugadzirwa kwecrevice corrosion:
1, kubatana pakati pezvikamu zvakasiyana zvezvimiro.
2, munzvimbo yesimbi yemadhipoziti, zvakanamirwa, zvekupfeka uye zvimwe zvigadzirwa zvekuora zviripo.
Nguva yekutumira: Mar-15-2024