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General Corrosion and Galvanic Corrosion Properties of Differently PVD Treated Magnesium Die Cast Alloy AZ91
Author(s) -
Hoche H.,
Blawert C.,
Broszeit E.,
Berger C.
Publication year - 2003
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200300402
Subject(s) - materials science , corrosion , metallurgy , coating , galvanic cell , galvanic corrosion , alloy , magnesium alloy , magnesium , optical microscope , scanning electron microscope , composite material
Developing PVD coating systems with better corrosion resistance leads to a duplex process, consisting of a plasma anodisation and an Al 2 O 3 top coating which can both be performed in a modified commercial PVD unit. The tested specimens were investigated by means of optical microscopy, SEM and EDX. Furthermore a novel immersion technique to determine the time dependent corrosion behavior of coated magnesium alloys is introduced.