AZ31 镁合金表面锰盐-氟锆酸盐复合转化膜的制备及性能

doi:10.3969/j.issn.1007-2861.2013.05.006

Abstract

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

CLC Number:

TQ 153.2

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（Natural Science Edition）, 2013, 13(5): 470-473.

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

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