Filiform corrosion phenomenon and its prevention method for 5000 series aluninum alloy sheet have been investigated. The painted aluminum alloys 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, galvainized 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.
Development of galvanized aluminum alloys sheet for body panels with an excellent filiform corrosion resistance
Entwicklung von galvanisierten Blechen aus Aluminiumlegierung mit ausgezeichneter Beständigkeit gegen Fadenkorrosion
SAE Technical Papers ; 1-7
1993
7 Seiten, 15 Bilder, 3 Tabellen, 7 Quellen
Aufsatz (Konferenz)
Englisch
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