个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:化学工程. 水科学与技术
办公地点:西部校区化工综合楼A503
联系方式:gchliu@dlut.edu.cn
电子邮箱:gchliu@dlut.edu.cn
Enhanced corrosion resistance of MgAl hydrotalcite conversion coating on aluminum by chemical conversion treatment
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论文类型:期刊论文
发表时间:2013-11-25
发表刊物:SURFACE & COATINGS TECHNOLOGY
收录刊物:SCIE、EI、Scopus
卷号:235
页面范围:484-488
ISSN号:0257-8972
关键字:Conversion coating; Aluminum; 8-Hydroxyquinolate; Corrosion resistance; Microstructure
摘要:The effects of the chemical conversion treatment in 8-hydroxyquinolate salt on the structure and corrosion resistance of MgAl hydrotalcite conversion coating on aluminum substrate have been 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 microstructure of MgAl hydrotalcite coating is preserved, while the corrosion resistance of Al substrate is effectively enhanced after the chemical conversion treatment The chemical conversion treatment results in the intercalation of 8-hydroxyquinolate anions into the coating, which induces the further decrease of corrosion current density of not converted sample by one order of magnitude after immersion in 3.5 wt.% NaCl solution. It provides a facile way to prepare environmentally friendly conversion coating for corrosion protection of light metal and alloys. (C) 2013 Elsevier B.V. All rights reserved.