中文

Journal of Shanghai University >

2013 , Vol. 19 >Issue 5: 470 - 473

DOI: https://doi.org/10.3969/j.issn.1007-2861.2013.05.006

Environmental and Chemical Engineering

Preparation and Properties of Manganese-Fluorozirconate Composite Conversion Coating on AZ31 Magnesium Alloy Surface

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  • 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
    2. College of Sciences, Shanghai University, Shanghai 200444, China;
    3. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200092, China

Received date: 2013-04-19

  Online published: 2013-10-28

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Abstract

A new chromium-free conversion coating on magnesium alloy was prepared. A cast magnesium alloy AZ31 series was used as the raw material. Compact chemical conversion coating was formed on the surface after mechanical polishing, alkaline washing, and chemical conversion. Surface morphology and composition of the coating were analyzed with a scanning electronic microscopy (SEM). Energy dispersive analysis (EDS) Tafel curves and drop corrosion test were used to evaluate the corrosion resistance of the conversion coating. The results show that compositions of coating are magnesium aluminum, oxygen, phosphorus, zinc, manganese and zirconium, and the coating has good adhesion and corrosion resistance.

Key words： conversion coatings; corrosion resistance; electrochemistry; magnesium alloy

Cite this article

CAO Tie-hua1, CHAI Rui-jie2, HUANG Hong-yan2, CHENG Dan-hong3, YE Gen2 . Preparation and Properties of Manganese-Fluorozirconate Composite Conversion Coating on AZ31 Magnesium Alloy Surface[J]. Journal of Shanghai University, 2013 , 19(5) : 470 -473 . DOI: 10.3969/j.issn.1007-2861.2013.05.006

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