Development of Galvanized Aluminum Alloy Sheet for Body Panels with an Excellent Filiform Corrosion Resistance

Paper #:
  • 930703

Published:
  • 1993-03-01
Citation:
Kaneko, K., Mochizuki, A., Nakajima, H., Ikeda, K. et al., "Development of Galvanized Aluminum Alloy Sheet for Body Panels with an Excellent Filiform Corrosion Resistance," SAE Technical Paper 930703, 1993, https://doi.org/10.4271/930703.
Pages:
9
Abstract:
Filiform corrosion phenomenon and its prevention method for 5000 series aluminum alloy sheet have been investigated.The painted aluminum alloy sheets were subject significantly to filiform corrosion caused by formation of a mottled and coarse zinc phosphate film during chemical conversion process. On the other hand, galvanized aluminum alloy sheet showed an uniform and fine phosphate film in a brief time and the filiform corrosion resistance was improved markedly.The test results of press-forming and corrosion for the prototype engine hoods made of this newly developed galvanized sheets have revealed a good formability and an excellent filiform corrosion resistance.
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