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Indexed by:期刊论文

Date of Publication:2010-10-15

Journal:SURFACE & COATINGS TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:205

Issue:2

Page Number:332-337

ISSN No.:0257-8972

Key Words:Mg-rich Al coating; ZL102 Al alloy; Sacrificial protection

Abstract: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