Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7895503 | Corrosion Science | 2014 | 10 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Qiufeng Zong, Lida Wang, Wen Sun, Guichang Liu,