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This article provides an overview of the metallurgical effects on corrosion of different series of aluminum alloys (1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, and 7xxx) that are classified into two categories. The first category includes the effects from insoluble, intermetallic constituent particles generally formed from trace impurity elements that play a predominant role in pitting corrosion. The second category comprises the effects from precipitation of secondary phases and effects from solute remaining in solid solution on corrosion of aluminum.

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