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论文类型：期刊论文

发表时间：2014-12-01

发表刊物：CORROSION SCIENCE

收录刊物：SCIE、EI

卷号：89

期号：C

页面范围：127-136

ISSN号：0010-938X

关键字：Alloy; SEM; XRD; Polarization; Passive films

摘要：The growth mechanism and electrochemical behavior of bis (8-hydroxyquinoline) magnesium (Mg(HQ)(2)) coating on AZ91D alloy were studied by SEM, XRD and electrochemical techniques. The results show that the corrosion of AZ91D alloy in 8-hydroxyquinolate anion solution induces active deposition of flower-like Mg(HQ)(2) coating on the alloy surface. The Mg(HQ)(2) coating provides a long-term barrier by its self-healing behavior, retarding the corrosion attack of aggressive species. Once the coating suffers from corrosion defect, the released Mg2+ ions and 8-hydroxyquinoline anions tend to recrystallize on the defect in the form of Mg(HQ)(2) deposits, thus effectively inhibits the further development of local corrosion. (C) 2014 Elsevier Ltd. All rights reserved.