Mgbe nchara na-acha nchara nchara pụtara n’elu ọkpọkọ igwe anaghị agba nchara, ọ na-eju ndị mmadụ anya nke ukwuu: “Nchara anaghị agba nchara, ọ bụrụkwa nchara, ọ bụghị igwe anaghị agba nchara, ọ pụkwara inwe nsogbu na ígwè ahụ.”N'ezie, nke a bụ echiche na-ezighị ezi nke otu akụkụ banyere enweghị nghọta nke igwe anaghị agba nchara.Igwe anaghị agba nchara ga-agbakwa nchara n'ọnọdụ ụfọdụ.
1. Igwe anaghị agba nchara abụghị nchara n'efu
Igwe anaghị agba nchara na-emepụtakwa oxide n'elu.Usoro nchara nke igwe anaghị agba nchara ugbu a n'ahịa bụ n'ihi ọnụnọ nke Cr element.Ihe na-akpata (ọrụ) nke igwe anaghị agba nchara corrosion eguzogide bụ echiche ihe nkiri na-agafe agafe.Ihe nkiri a na-akpọ passivation bụ ihe nkiri dị mkpa nke ejiri Cr2O3 mejupụta n'elu igwe anaghị agba nchara.N'ihi ịdị adị nke ihe nkiri a, a na-egbochi corrosion nke igwe anaghị agba nchara na mgbasa ozi dị iche iche, a na-akpọkwa ihe omume a passivation.Enwere ikpe abụọ maka ịmepụta ihe nkiri passivation a.Otu bụ na igwe anaghị agba nchara n'onwe ya nwere ikike nke onwe ya, na nke a na-eme ka ikike nke onwe ya na-abawanye site na mmụba nke ọdịnaya chromium, ya mere ọ na-eguzogide nchara;Ọnọdụ nhazi nke sara mbara karị bụ na igwe anaghị agba nchara na-etolite ihe nkiri passivation na usoro nke imebi ya na ngwọta mmiri dị iche iche (electrolytes), nke na-egbochi corrosion.Mgbe ihe nkiri passivation mebiri emebi, enwere ike ịmepụta ihe nkiri passivation ọhụrụ ozugbo.
Ihe mere na ihe nkiri na-agafe agafe nke igwe anaghị agba nchara nwere ikike iguzogide corrosion nwere njirimara atọ: otu bụ na ọkpụrụkpụ nke ihe nkiri ahụ dị oke mkpa, n'ozuzu naanị micron ole na ole mgbe ọdịnaya chromium dị> 10.5%;nke ọzọ bụ kpọmkwem ike ndọda nke passive film bụ ukwuu karịa kpọmkwem ike ndọda nke mkpụrụ;njirimara abụọ a na-egosi na ihe nkiri passivation dị ma dị gịrịgịrị ma dị oke, ya mere ọ na-esiri ike imebi ihe nkiri ahụ na-eme ihe na-adịghị mma iji mebie mkpụrụ ahụ ngwa ngwa;njirimara nke atọ bụ na ọnụọgụ chromium nke ihe nkiri ahụ na-agafe agafe bụ ihe karịrị okpukpu atọ karịa;ya mere, ihe nkiri na-agafe agafe nwere nnukwu nguzogide corrosion.
2. N'okpuru ọnọdụ ụfọdụ, igwe anaghị agba nchara ga-emebikwa
Mpaghara ngwa ngwa nke igwe anaghị agba nchara dị oke mgbagwoju anya, yana ihe nkiri chromium oxide dị mfe enweghị ike imezu ihe achọrọ nke nguzogide corrosion dị elu.Ya mere, ihe ndị dị ka molybdenum (Mo), ọla kọpa (Cu), na nitrogen (N) dị mkpa ka agbakwunyere nchara dị ka ọnọdụ dị iche iche eji eme ihe iji meziwanye ihe mejupụtara ihe nkiri passivation ma na-emeziwanye nguzogide corrosion nke igwe anaghị agba nchara.Mgbakwunye nke Mo n'ike na-akwalite mkpokọta ngafe n'ihi na ngwaahịa corroded MoO2- dị nso na mkpụrụ na-egbochi corrosion nke mkpụrụ;ihe mgbakwunye nke Cu na-eme ka ihe nkiri na-agafe agafe na elu igwe anaghị agba nchara nwere CuCl, nke na-eme ka arụmọrụ nke ihe nkiri ahụ dịkwuo mma n'ihi na ọ dịghị emekọrịta ihe na-emebi emebi.Nguzogide corrosion;na-agbakwụnye N, n'ihi na ihe nkiri passivation na-eme ka Cr2N dịkwuo mma, a na-abawanye ụbara Cr na ihe nkiri passivation, si otú a na-eme ka nguzogide corrosion nke igwe anaghị agba nchara.
Nguzogide corrosion nke igwe anaghị agba nchara bụ ọnọdụ.Otu ọkwa nke igwe anaghị agba nchara bụ ihe na-eguzogide corrosion n'otu ebe, mana enwere ike mebie ya na usoro ọzọ.N'otu oge ahụ, nguzogide corrosion nke igwe anaghị agba nchara nwekwara ikwu.Ka ọ dị ugbu a, ọ nweghị igwe anaghị agba nchara nke na-adịghị emebi emebi na gburugburu ebe niile.
Igwe anaghị agba nchara nwere ike iguzogide ikuku oxygen - ya bụ, nchara nchara, ma nweekwa ike imebi na mgbasa ozi nwere acid, alkalis, na salts - ya bụ, nkwụsị nke corrosion.Otú ọ dị, a na-agbanwe nha nke ikike mgbochi ya na ihe mejupụtara kemịkalụ nke ígwè n'onwe ya, ọnọdụ nchebe, ọnọdụ ojiji na ụdị mgbasa ozi gburugburu ebe obibi.Dị ka ihe atụ, 304 ígwè ọkpọkọ nwere nnọọ magburu onwe mgbochi corrosion ikike na akọrọ na dị ọcha ikuku, ma ọ bụrụ na ọ na-akwaga n'akụkụ oké osimiri, ọ ga-nchara n'oge na-adịghị na oké osimiri foogu nwere otutu nnu;ebe ọkpọkọ ígwè 316 na-egosi ihe ọma.Ya mere, ọ bụghị ụdị igwe anaghị agba nchara nwere ike iguzogide corrosion na nchara na gburugburu ebe ọ bụla.
Oge nzipu: Sep-23-2022