Passivator Composition of Rich of Phytic Acid Used for Brass-Strip

Abstract:

Passivator components of phytic acid, hydrogen peroxide, boric acid and polyethylene glycol was optimized by orthogonal experiment. Corrosion resistance of passivation film of brass-strip was invertigated by salt spraying, weight loss and electrochemical test. The results show that the optimization passivator consists of phytic acid (50% mass fraction) 8ml/L, hydrogen peroxide (mass fraction 30%) 30ml/L, boric acid 5g/L, polyethylene glycol 15ml/L and additive 4g/L. Corrosion current density and corrosion rate of the brass-strip specimens coated by rich-phytic acid passivator are similar to that treated by traditional sodium dichromate passivator, the characteristic of anti-tarnish slightly better than that coated by sodium dichromate passivator. The feature of rich-phytic acid passivator is environmental protection.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 36-39
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.36
• Online since: November 2011
• Authors: Wei Cai, Li Li, Ren Hui Liu, Zhen Zhen Wan
• Keywords: Boric Acid, Corrosion Resistance, Environmental Protection, Hydrogen Peroxide, Passivator for Brass-Strip, Phytic Acid, Polyethylene Glycol (PEG)

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