Galvanized plating
Zinc kwụsiri ike na ikuku akọrọ na ọ dịghị mfe ịgbanwe agba.N'ime mmiri na ikuku iru mmiri, ọ na-emeghachi omume na oxygen ma ọ bụ carbon dioxide iji mepụta ihe nkiri oxide ma ọ bụ alkaline zinc carbonate, nke nwere ike igbochi zinc ka ọ nọgide na-abụ oxidized ma rụọ ọrụ nchebe.
Zinc dị mfe na-emebi emebi na acid, alkalis na sulfides.Ihe oyi akwa galvanized na-agafe agafe.Mgbe passivation na chromic acid ma ọ bụ ngwọta chromate, ihe nkiri passivation kpụrụ adịghị mfe iji ikuku mmiri na-emekọrịta ihe, na ikike mgbochi corrosion na-abawanye nke ukwuu.Maka akụkụ mmiri, akụkụ ndị nwere mgbidi dị mkpa (mgbidi mgbidi <0.5m) na akụkụ ígwè chọrọ ike ọrụ dị elu, a ghaghị iwepụ hydrogen, na ọla kọpa na ọla kọpa alloy nwere ike ghara iwepụ hydrogen.
Ụdị ikike nke zinc dịtụ njọ, ya mere mkpuchi zinc bụ mkpuchi anodic maka ọtụtụ ọla.
Ngwa: Na-eme galvanizing a na-ejikarị na ọnọdụ ikuku na gburugburu ebe ndị ọzọ dị mma.Ma ọ bụghị maka akụkụ esemokwu.
Cadmium plating
Akụkụ dị na kọntaktị na ikuku mmiri ma ọ bụ mmiri mmiri na mmiri ọkụ n'elu 70 ℃, mkpuchi cadmium dịtụ kwụsiri ike, nwere nguzogide corrosion siri ike, ezigbo mmanu, na-agbaze nwayọọ nwayọọ na mmiri hydrochloric acid, ma ọ dị mfe igbari na nitric acid., ihe na-esighi ike na alkali, na oxides ya anaghị agbaze na mmiri.
Ihe mkpuchi cadmium dị nro karịa mkpuchi zinc, ihe mkpuchi hydrogen nke mkpuchi ahụ dị ntakịrị, na adhesion siri ike, na n'okpuru ọnọdụ electrolytic ụfọdụ, mkpuchi cadmium nwetara mara mma karịa mkpuchi zinc.Ma gas na-emepụta mgbe cadmium gbazere na-egbu egbu, nnu cadmium soluble na-egbukwa egbu.N'okpuru ọnọdụ nkịtị, cadmium bụ mkpuchi cathodic na ígwè na mkpuchi anodic na mmiri na ikuku okpomọkụ.
Ngwa: A na-ejikarị echebe akụkụ site na corrosion ikuku nke mmiri osimiri ma ọ bụ ngwọta nnu yiri ya na ikuku mmiri jupụtara.Ọtụtụ akụkụ ụgbọ elu, mmiri na eletrọnịkị ụlọ ọrụ mmepụta ihe, isi iyi, na akụkụ eri ka ejiri cadmium kpuchie.Enwere ike ịchacha, phosphatized ma jiri ya mee ihe dị ka ihe eji agba agba, mana enweghị ike iji ya dị ka tebụl.
Chrome Plating
Chromium kwụsiri ike na ikuku iru mmiri, alkali, nitric acid, sulfide, ngwọta carbonate na acid organic, ọ dịkwa mfe soluble na hydrochloric acid na sulfuric acid na-ekpo ọkụ.
N'okpuru ọrụ nke ugbu a kpọmkwem, ọ bụrụ na ejiri oyi akwa chromium mee ihe dị ka anode, ọ na-adị mfe soluble na ngwọta soda caustic.
Ngwunye chromium nwere nchikota siri ike, ike siri ike, 800 ~ 1000V, ezigbo nkwụsị nke na-eyi, ìhè ọkụ siri ike, na nnukwu ọkụ ọkụ.Gbadara nke ọma.Mwepu nke chromium bụ na ọ siri ike, na-agbaji ma dị mfe ịdapụ, nke na-apụta ìhè karịa mgbe a na-agbanye ya n'ọtụtụ ujo.
N'otu oge ahụ, chrome bụ porous.Metal chromium na-adị mfe na-agafe na ikuku iji mepụta ihe nkiri passivation, si otú ahụ na-agbanwe ikike nke chromium.Chromium na ígwè si otú a na-aghọ ihe mkpuchi cathodic.
Ngwa: Ọ dịghị mma ozugbo efere chrome n'elu nchara akụkụ dị ka mgbochi corrosion oyi akwa.N'ozuzu, multi-layer electroplating (ie ọla kọpa plating → nickel → chromium) nwere ike nweta nzube nke mgbochi nchara na ịchọ mma.Ka ọ dị ugbu a, a na-eji ya eme ihe n'ọtụtụ ebe iji melite nkwụsị nke akụkụ, na-edozi akụkụ, ntụgharị ọkụ na ọkụ ọkụ.
Ngwakọta nickel
Nickel nwere ezigbo nkwụsi ike nke kemịkalụ na ikuku na lye, ọ dịghị mfe ịgbanwe agba, ọ na-adịkwa oxidized naanị mgbe okpomọkụ dị n'elu 600 ° C.Ọ na-agbaze nwayọ na sulfuric acid na hydrochloric acid, mana ọ na-agbaze ngwa ngwa na nitric acid.Ọ dị mfe ịbanye na nitric acid gbadoro ụkwụ ma si otú a nwee ezigbo nguzogide corrosion.
Nickel plating siri ike, ọ dị mfe ịchacha, nwere ngosipụta ọkụ dị elu ma na-agbakwunye aesthetics.Ọdịmma ya bụ porosity ya, iji merie adịghị ike a, enwere ike iji metal plating multi-layer plating, na nickel bụ oyi akwa etiti.Nickel bụ mkpuchi cathodic maka ígwè na mkpuchi anodic maka ọla kọpa.
Ngwa: A na-ejikarị egbochi corrosion na ịbawanye mma, n'ihi ya, a na-ejikarị ya echebe mkpuchi ịchọ mma.Ịtinye nickel na ngwaahịa ọla kọpa dị mma maka mgbochi corrosion, ma n'ihi na nickel dị ọnụ ahịa karịa, a na-ejikarị ọla kọpa-tin alloys eme ihe kama iji nickel plating.
Oge nzipu: Ọktoba 11-2022