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. Chemical passivation: tumadi site chemical mmeghachi omume n'etiti metal na ike oxidants, e guzobere a ok film nke oxides ma ọ bụ ndị ọzọ ogige n'elu nke metal, nke na-ekpuchi metal elu, kewapụrụ metal si ihe ngwọta, si otú impeding metal si nọgidere oxidation na mgbasa.
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 e guzobere metal oxides ma ọ bụ salts n'elu nke electrode, ihe ndị a na-tightly kpuchie na metal elu na-aghọ passivation film na-eduga metal passivation.
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