Igwe anaghị agba nchara anaghị agba nchara, mana ọ naghị adị mfe nchara. N'okpuru ọnọdụ ụfọdụ, igwe anaghị agba nchara ga-agbakwa nchara. N'elu igwe anaghị agba nchara nwere nnọọ mkpa, mkpa na kwụsiri ike chromium ọgaranya oxide film, igwe anaghị agba nchara nchara, nke a oxide film iji gbochie oxygen atọm infiltration ọxịdashọn mmeghachi omume na nchara. N'ezie, ụfọdụ igwe anaghị agba nchara nwere ma nchara na-eguzogide ọgwụ (corrosion resistance). Nchara na nguzogide corrosion nke igwe anaghị agba nchara bụ n'ihi nguzobe nke ihe nkiri oxide chromium bara ụba (ihe nkiri passivation) n'elu ya, nke na-ekewapụ ígwè ahụ site na mpụga mpụga, na-egbochi ígwè ahụ ka ọ ghara imebiwanye ya, ma nwee ikike. rụkwaa onwe ya. Ọ bụrụ na ọ mebiri emebi, chromium na nchara ga-eme ka ihe nkiri na-agafe agafe na ikuku oxygen dị na etiti ma nọgide na-arụ ọrụ nchebe. Mgbe ihe nkiri oxide mebiri emebi, ọ na-agba nchara ngwa ngwa.
1) Gburugburu ebe obibi nke igwe anaghị agba nchara bụ iru mmiri, n'ihe banyere mmiri na oxygen, nhazi nke organic acid na mmebi mmebi n'elu igwe anaghị agba nchara.
2) Ngwaahịa igwe anaghị agba nchara na-emebi emebi site na ngwa nrụnye wee mebie ihe nkiri nchebe elu. Dịka ọmụmaatụ, mgbe etinyere bolts igwe anaghị agba nchara n'ime injinia mgbidi nke dị n'èzí, mgbanaka ahụ na-akpata mmebi n'ibu n'ebe ebe onye isi bolt na-akpakọrịta. Mgbe mmiri ozuzo sachara, isi nke igwe anaghị agba nchara ga-apụta ntakịrị nchara na-ese n'elu mmiri.
3) E nwere uzuzu uzuzu ma ọ bụ metal ahụ n'elu igwe anaghị agba nchara, nke dị mfe electrochemical meghachi omume na igwe anaghị agba nchara na iru mmiri ikuku mee ngwangwa corrosion nke igwe anaghị agba nchara.
4) Igwe anaghị agba nchara n'elu ekpughere na acid, alkali, nnu na ihe ndị ọzọ na-adịkarị mfe na mmeghachi omume chemical corrosion. Dịka ọmụmaatụ, a na-ahọrọ ihe mkpuchi mgbidi ákwà mgbochi na obodo ndị dị n'ụsọ oké osimiri maka ngwaahịa igwe anaghị agba nchara 316 (ihe na-eguzogide corrosion karịa 304 igwe anaghị agba nchara), n'ihi na nnukwu nnu dị n'ime ikuku nke obodo ndị dị n'ụsọ oké osimiri dị mfe ime ka corrosion na igwe anaghị agba nchara.
Ya mere, iji mee ka ngwaahịa igwe anaghị agba nchara na-egbuke egbuke ma ghara imebi ya, ọ dị mkpa ịhọrọ ihe ziri ezi nke ngwaahịa igwe anaghị agba nchara, na-esote ya bụ iji kpochapụ ma nọgide na-enwe ngwaahịa igwe anaghị agba nchara, wepụ ihe ndị na-adịghị mma n'elu iji zere mmeghachi omume na corrosion.
Oge nzipu: Ọgọst-19-2022