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Development of Corrosion Testing Protocols for Magnesium Alloys and Magnesium-Intensive Subassemblies
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 08, 2013 by SAE International in United States
Citation: McCune, R., Forsmark, J., Schneider, B., Luo, A. et al., "Development of Corrosion Testing Protocols for Magnesium Alloys and Magnesium-Intensive Subassemblies," SAE Int. J. Mater. Manf. 6(2):242-247, 2013, https://doi.org/10.4271/2013-01-0978.
Corrosion tendency is one of the major inhibitors for increased use of magnesium alloys in automotive structural applications. Moreover, systematic or standardized methods for evaluation of both general and galvanic corrosion of magnesium alloys, either as individual components or eventually as entire subassemblies, remains elusive, and receives little attention from professional and standardization bodies. This work reports outcomes from an effort underway within the U.S. Automotive Materials Partnership - ‘USAMP’ (Chrysler, Ford and GM) directed toward enabling technologies and knowledge base for the design and fabrication of magnesium-intensive subassemblies intended for automotive “front end” applications. In particular, subassemblies consisting of three different grades of magnesium (die cast, sheet and extrusion) and receiving a typical corrosion protective coating were subjected to cyclic corrosion tests as employed by each OEM in the consortium. Results of these tests are compared.
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