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论文类型：期刊论文

发表时间：2010-10-15

发表刊物：SURFACE & COATINGS TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：205

期号：2

页面范围：332-337

ISSN号：0257-8972

关键字：Mg-rich Al coating; ZL102 Al alloy; Sacrificial protection

摘要：A Mg-rich Al coating is deposited on ZL102 Al Alloy by twin-wire arc spray technology, with Mg lamellas and Al lamellas presenting alternately The corrosion behaviour of the Mg-rich Al coating has been studied by salt solution immersion test (SSIT), open circuit potential (OCP) and potentiodynamic polarization Corrosion test results show that the Mg-rich Al coating as a sacrificial protection coating has the capability of providing sacrificial protection for the ZL102 Al alloy substrate. In the Mg-rich Al coating, Al lamellas make the Mg lamellas in electrical contact among themselves and also with the substrate. At the same time. Al lamellas play an important role in improving the corrosion of the Mg-rich Al coating. For Mg lamellas. they could prevent the corrosion of Al substrate and Al lamellas in Mg-rich Al coating by cathodic polarization. (C) 2010 Elsevier B.V. All rights reserved