[Stainless steel passivation] what does effect of effect of stainless steel passivation have?
1, place of stainless steel itself contains the elemental effect to passivation effect. The passivation ability of stainless steel, depend on the Ke Dun that stainless steel place contains an element turns a sex. In the compositive element of stainless steel, chromic, nickel belongs to the element with passivation strong sex, the passivation of iron sexual criterion take second place. Accordingly, the content of chromium and nickel heals tall, the passivation sex of stainless steel heals strong, and, the stability of passivation film follows chromic nickel to rise and increase of content.
2, the influence of structure of stainless steel metallographic to passivation. Austenite stainless steel and ferrite stainless steel has evener organization, need not pass the aggrandizement of heat treatment, ke Dun turns performance opposite also better. And martensite stainless steel passes heat treatment aggrandizement, its metallographic organization is polyphase organization, those who go against passivation craft undertake, consequently the Ke Dun of martensite itself turns a sex not strong, so of martensite be able to bear or endure corrode sex is relatively inferior also.
3, the treatment status to stainless steel passivation impact of stainless steel. Via machining, best; casts the passivation sex that machines condition like the cutting, polish, bright and clean surface after burnishing, gush is arenaceous, forging the surface of income work is rough condition, passivation sex is the poorest.
4, stainless steel place contains the other element effect to stainless steel passivation. Stainless steel place contains, if the element such as manganese, carbon, silicon is right passivation is adverse, and element of contains sulfur, Selenium is right passivation sex is poorer. Accordingly, be in apparently these elements of existence, should try beforehand passivation of the ability after eliminate. The DunHua366A that limited company of Shenzhen passivation technology manufactures is the optimal choice of stainless steel passivation.
