Passivation bụ usoro iji belata ọnụ ọgụgụ nke corrosion nke ígwè site n'ịgbanwe elu ya ka ọ bụrụ ọnọdụ nke na-adịghị emetụta oxidation. Tụkwasị na nke ahụ, ihe omume nke ígwè na-arụ ọrụ ma ọ bụ alloy, bụ nke ọrụ kemịkal na-ebelata nke ukwuu ka ọ bụrụ ọnọdụ metal dị mma, a na-akpọkwa passivation.
A na-enweta ngafe nke ọla na gburugburu ebe obibi n'ụzọ abụọ:
1. Kemịkalụ passivation: tumadi site na mmeghachi omume kemịkalụ n'etiti ígwè na oxidants siri ike, nguzobe nke ihe nkiri siri ike nke oxides ma ọ bụ ogige ndị ọzọ n'elu ígwè ahụ, nke na-ekpuchi elu ígwè ahụ, na-ekewapụ ígwè ahụ site na ngwọta, si otú a na-egbochi ya. Ọxịdashọn na mgbasa nke ọla ahụ na-aga n'ihu.
2. Anodic passivation: makwaara dị ka electrochemical passivation, bụ dị ka anode nke metal ma ọ bụ ogige n'okpuru omume nke ugbu a, dị iche iche degrees, na-efunahụ ike ịnyefe na ngwọta. Anodic passivation mere site anodic polarization nke metal passivation onu, ya bụ, metal n'okpuru edinam nke ugbu a, ya electrode nwere mgbanwe na guzobe nke metal oxides ma ọ bụ salts n'elu nke electrode, ndị a bekee na- tightly kpuchie na. elu igwe ka ọ bụrụ ihe nkiri passivation na-eduga na passivation metal.
N'ozuzu, ọ bụ ezie na passivation kemịkalụ na anodic passivation ma na-agbanwe elu igwe ka ọ bụrụ ọnọdụ nke na-adịghị emetụta oxidation, usoro nhazi ha na ndabere ngwa dị iche iche. Chemical passivation Nleta a nchebe film na metal elu tumadi site chemical Jeremaya mere, ebe anodic passivation Nleta a passivation film na metal elu site electrochemical Filiks, ma nke e mere ka retard ọnụego nke corrosion nke metal.
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Oge nzipu: Ọgọst-14-2024