Ihe na-akpata corrosion igwe anaghị agba nchara

Ngwọta kachasị mma nke igwe anaghị agba nchara bụ n'ihi ịmepụta ihe nkiri oxide na-adịghị ahụ anya n'elu ígwè ahụ, na-eme ka ọ ghara ịdị na-agafe agafe.A na-emepụta ihe nkiri na-agafe agafe n'ihi nchara na-emeghachi omume na ikuku oxygen mgbe ekpughere ya na ikuku, ma ọ bụ n'ihi kọntaktị na mpaghara ndị ọzọ nwere oxygen.Ọ bụrụ na e bibiri ihe nkiri passivation, igwe anaghị agba nchara ga-aga n'ihu na-emebi emebi.N'ọtụtụ ọnọdụ, a na-ebibi ihe nkiri passivation naanị n'elu igwe na mpaghara mpaghara, na mmetụta nke corrosion na-emepụta obere oghere ma ọ bụ olulu, na-eme ka obere olulu dị ka corrosion na-ekesa n'oge na-adịghị anya n'elu ihe ahụ.

O yikarịrị ka ọ ga-abụ n'ihi ọnụnọ nke ion chloride jikọtara ya na depolarizers.A na-ebutekarị corrosion corrosion nke igwe anaghị agba nchara dị ka igwe anaghị agba nchara site na mmebi mpaghara nke ụfọdụ anions ike ike na fim ahụ na-agafe agafe, na-echebe steeti na-agafe agafe na nguzogide corrosion dị elu.Ọtụtụ mgbe, a na-achọ gburugburu oxidizing, mana nke a bụ kpọmkwem ọnọdụ nke corrosion nke pitting na-apụta.The ọkara maka pitting corrosion bụ ọnụnọ nke arọ metal ion dị ka FE3+, Cu2+, Hg2+ na C1-, Br-, I-, Cl04-solutions ma ọ bụ chloride ngwọta nke Na +, Ca2+ alkali na alkaline Earth metal ion nwere H2O2, O2, wdg.
Ọnụ ọgụgụ olulu na-abawanye na okpomọkụ na-abawanye.Dịka ọmụmaatụ, na ngwọta na ntinye nke 4% -10% sodium chloride, oke oke ibu n'ihi nkwụsị nke pitting na-eru na 90 ° C;maka ngwọta dilute ọzọ, ihe kachasị na-eme na okpomọkụ dị elu.