1. Igwe anaghị agba nchara anaghị agba nchara, ọ na-emepụtakwa oxide n'elu.

Usoro enweghị nchara nke igwe anaghị agba nchara ugbu a n'ahịa bụ n'ihi ọnụnọ nke Cr.Isi ihe kpatara nguzogide corrosion nke igwe anaghị agba nchara 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 ọnọdụ abụọ maka ịmepụta ụdị ihe nkiri passivation a.Otu bụ na igwe anaghị agba nchara n'onwe ya nwere ikike nke ngafe onwe ya.Nke a na ikike ngafe onwe ya na-abawanye na mmụba nke ọdịnaya chromium, ya mere ọ nwere nguzogide nchara;nke ọzọ A ọzọ ukwuu e guzobere ọnọdụ bụ igwe anaghị agba nchara Nleta a na-agafe agafe film na usoro nke corroded dị iche iche aqueous ngwọta (electrolytes) egbochi corrosion.Mgbe ihe nkiri passivation mebiri emebi, enwere ike ịmepụta ihe nkiri passivation ọhụrụ ozugbo.

Ihe nkiri passivation igwe anaghị agba nchara nwere ikike iguzogide corrosion, e nwere njirimara atọ: nke mbụ, ọkpụrụkpụ nke ihe nkiri passivation dị oke mkpa, n'ozuzu naanị microns ole na ole n'okpuru ọnọdụ nke ọdịnaya chromium> 10.5%;nke abụọ bụ kpọmkwem ike ndọda nke passivation film Ọ dị ukwuu karịa kpọmkwem ike ndọda nke mkpụrụ;àgwà abụọ a na-egosi na ihe nkiri passivation dị gịrịgịrị na nke siri ike, ya mere, ihe nkiri passivation siri ike ịbanye site na ihe na-emebi emebi ngwa ngwa na-emebi mkpụrụ;njirimara nke atọ bụ chromium ntinye uche nke ihe nkiri passivation The substrate bụ ihe karịrị okpukpu atọ karịa;ya mere, ihe nkiri passivation nwere nnukwu nguzogide corrosion.

2. Igwe anaghị agba nchara ga-emebikwa n'okpuru ọnọdụ ụfọdụ.

Mpaghara ngwa ngwa nke igwe anaghị agba nchara dị oke mgbagwoju anya, na ihe nkiri passivation chromium oxide dị ọcha enweghị ike imezu ihe achọrọ nke nguzogide corrosion dị elu.Ya mere, ọ dị mkpa ịgbakwunye ihe ndị dị ka molybdenum (Mo), ọla kọpa (Cu), nitrogen (N), wdg na ígwè dị ka ọnọdụ dị iche iche eji eme ihe iji meziwanye ihe mejupụtara nke ihe nkiri passivation ma na-emeziwanye nguzogide corrosion igwe anaghị agba nchara.Na-agbakwụnye Mo, n'ihi na ngwaahịa corrosion MoO2- dị nso na mkpụrụ osisi ahụ, ọ na-akwalite ike nke mkpokọta mkpokọta ma na-egbochi mmebi nke mkpụrụ;Mgbakwunye nke Cu na-eme ka ihe nkiri na-agafe agafe n'elu igwe anaghị agba nchara nwere CuCl, nke a na-eme ka ọ dịkwuo mma n'ihi na ọ naghị emekọrịta ihe na-emebi emebi.Nguzogide corrosion;na-agbakwụnye N, n'ihi na ihe nkiri passivation na-eme ka Cr2N dịkwuo mma, ntinye nke Cr na ihe nkiri passivation na-abawanye, si otú ahụ na-eme ka nkwụsị nke corrosion nke igwe anaghị agba nchara.

Nguzogide corrosion nke igwe anaghị agba nchara bụ ọnọdụ.Akara igwe anaghị agba nchara na-eguzogide corrosion n'otu usoro, mana enwere ike mebie ya n'ụzọ 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-anaghị emebi emebi na gburugburu ebe niile.

3. Mmetụta mmetụta.

Igwe anaghị agba nchara nwere Cr wee mepụta ihe nkiri chromium oxide n'elu, nke na-efunahụ ọrụ kemịkalụ wee kpọọ steeti ngafe.Otú ọ dị, ọ bụrụ na austenitic usoro na-agafe na okpomọkụ nso nke 475 ~ 850 ℃, C ga-ejikọta na Cr na-etolite chromium carbide (Cr23C6) na precipitate na crystal.Ya mere, ọdịnaya Cr dị nso na oke ọka na-ebelata nke ukwuu, na-aghọ mpaghara Cr-ogbenye.N'oge a, a ga-ebelata nguzogide corrosion ya, ọ na-enwekwa mmetụta na gburugburu ebe obibi ndị na-emebi emebi, ya mere a na-akpọ ya sensitization.Mmetụta uche nwere ike imebi na gburugburu ebe a na-eji acid oxidizing.Tụkwasị na nke ahụ, e nwere mpaghara ikpo ọkụ na-emetụta ọkụ na mpaghara nhazi na-ekpo ọkụ.

4. Ya mere, n'ọnọdụ ndị dị aṅaa ka igwe anaghị agba nchara corrode?

N'ezie, igwe anaghị agba nchara abụghị nke nchara, ma ọnụ ọgụgụ nchara ya dị ala karịa nchara ndị ọzọ dị n'okpuru otu ebe, na mgbe ụfọdụ enwere ike ileghara ya anya.