Effect of Phosphating Technologies on Corrosion Resistance of Phosphate Coatings on 6063 Aluminum Alloy

Bi Lan Lin; Yu Ye Xu; Biao Tian

doi:10.4028/www.scientific.net/AMR.399-401.2079

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 399-401Effect of Phosphating Technologies on Corrosion...

Effect of Phosphating Technologies on Corrosion Resistance of Phosphate Coatings on 6063 Aluminum Alloy

Abstract:

The basic formulation and technologies of phosphating for 6063 aluminum alloys were discussed to enhance the corrosion resistance. The effect of phosphating time, pH, ZnO, H₃PO₄ and NaF content on corrosion resistance was investigated using Tafel polarization methods. The results show that the optimum phosphating technologies of 6063 aluminum alloys are as follows: 7 g/L ZnO, 20 mL/L 85% H3PO4, 1.2 g/L NaF, pH 3.0, temperature 45±2°C, phosphating time 7 min. After phosphating treatment the anodic and cathodic corrosion processes of 6063 alloys are suppressed greatly, and the corrosion resistance is enhanced.

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Periodical:

Advanced Materials Research (Volumes 399-401)

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2079-2082

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.2079

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Online since:

November 2011

Authors:

Bi Lan Lin, Yu Ye Xu, Biao Tian

Keywords:

Aluminium Alloy, Corrosion Resistance, Phosphate Coatings, Polarization

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