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论文类型：期刊论文

发表时间：2013-09-01

发表刊物：MATERIALS LETTERS

收录刊物：SCIE、EI

卷号：106

页面范围：111-114

ISSN号：0167-577X

关键字：Hydrothermal; Conversion coating; AZ91D; Corrosion; Deposition

摘要：MgAl hydrotalcite conversion coating was synthesized in situ on AZ91D alloy by hydrothermal treatment in ammonia nitrate aqueous solution. The structure and property of hydrotalcite conversion coating were investigated by Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and electrochemical measurements. The results show that the hydrothermally synthesized hydrotalcite conversion coating effectively confers good corrosion resistance on AZ91D alloy. The corrosion-current density of treated AZ91D alloy is decreased by one order of magnitude as compared to untreated one. It provides a facile way to synthesize chromium-free conversion coating for the corrosion protection of magnesium-aluminum alloy. (C) 2013 Elsevier B.V. All rights reserved.