Phosphating bụ ụzọ dị mkpa maka mgbochi corrosion na ihe igwe.Ebumnobi ya na-agụnye inye nchebe corrosion na metal ala, na-eje ozi dị ka primer tupu eserese, na-eme ka adhesion na corrosion resistance nke mkpuchi mkpuchi, na-eme dị ka ihe na-esi ísì ụtọ na nhazi ígwè.Enwere ike ịkewa Phosphating n'ime ụdị atọ dabere na ngwa ya: 1) mkpuchi phosphating, 2) phosphating na-ekpo ọkụ extrusion oyi, na 3) phosphating ịchọ mma.A pụkwara ịkewa ya site n'ụdị phosphate a na-eji, dị ka zinc phosphate, zinc-calcium phosphate, iron phosphate, zinc-manganese phosphate, na manganese phosphate.Ọzọkwa, phosphating nwere ike ekewa site na okpomọkụ: elu-okpomọkụ (n'elu 80 ℃) phosphating, ọkara-okpomọkụ (50-70 ℃) phosphating, ala okpomọkụ (ihe dị ka 40 ℃) phosphating, na ọnụ ụlọ-okpomọkụ (℃ 10-3) phosphating.
N'aka nke ọzọ, kedu ka passivation si eme na ọla, gịnịkwa bụ usoro ya?Ọ dị mkpa iburu n'obi na ngafe bụ ihe na-ebute site na mmekọrịta dị n'etiti oge igwe na usoro ihe ngwọta ma ọ bụ site na ọdịdị ihu.Nchọpụta egosila mmetụta nke nhịahụ n'ibu na ọla n'ime steeti enweghị ike.Nnwale na-egosi na abrasion na-aga n'ihu nke elu igwe na-akpata nnukwu mgbanwe na-adịghị mma na ikike ígwè ahụ, na-eme ka ígwè ahụ rụọ ọrụ na ọnọdụ na-agafe agafe.Nke a na-egosi na ngafe bụ ihe dị n'etiti ihu na-eme mgbe ọla na-abanye na kọntaktị n'okpuru ọnọdụ ụfọdụ.Passivation eletrọnịkị na-eme n'oge polarization anodic, na-eduga na mgbanwe n'ikike igwe na nguzobe nke oxides metal ma ọ bụ nnu n'elu elektrọd, na-emepụta ihe nkiri na-agafe agafe ma na-eme ka ngafe igwe.N'aka nke ọzọ, ngafe kemịkalụ na-agụnye ihe ndị na-emepụta ihe na-emepụta ihe dị ka HNO3 gbadoro anya na metal, na-emepụta ihe nkiri oxide n'elu, ma ọ bụ mgbakwunye nke ọla ndị na-agafe agafe dị mfe dị ka Cr na Ni.Na passivation nke kemịkalụ, ntinye nke ihe mgbakwunye oxidizing agbakwunyere ekwesịghị ịda n'okpuru uru dị oke egwu;ma ọ bụghị ya, ọ nwere ike ọ gaghị eme ka ngafe ma nwee ike iduga mgbasa ígwè ngwa ngwa.
Oge nzipu: Jan-25-2024