Preparation & Microscopic Characterization of Non-Chrome Chemical Conversion Film in Aluminum Surface

Zemin Chen, Pin Lu, Jianzhong Xu, Yanzun Yang

College of Chemistry and Environmental Science, Hebei University, Baoding, China..
School of Chemistry and Material Science, Langfang Normal College, Langfang, China..

DOI: 10.4236/ampc.2013.31002                

Abstract

A chromium-free environmental protection aluminum surface treatment technology was developed by theoretical analysis and a large number of experiments. Add zirconium ions and cerium ions to the treatment solution, besides adding fluoride, aluminum and hydrogen peroxide, etc. According to the orthogonal test obtained a non-chromate film-formation process of environmental friendly aluminum. The characterization methods including SEM, XPS and XRD were applied to study and analyze the morphology, composition, phase, and corrosion resistance of phosphate film, then discussed the film-forming reaction mechanism. Results showed that chemical conversion film formed on the aluminum surface was uniform, compact and stronger anti-corrosion could replace the traditional, more toxic chromate conversion film.

Keywords

Non-Chrome Chemical Conversion Film; Microscopic Characterization; Aluminum Surface

Conflicts of Interest

The authors declare no conflicts of interest.

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