1986-02-01

High Purity Magnesium AM60 Alloy: The Critical Contaminant Limits and the Salt Water Corrosion Performance 860288

Standard salt spray corrosion tests have been used with controlled purity AM60 castings to define the critical iron, nickel, and copper contaminant levels below which excellent corrosion performance can be obtained. As previously observed with the AZ91 alloy, the iron solubility and the corrosion tolerance limit for iron are dependent upon the manganese content of the metal. The zinc free AM60 alloy has a somewhat lower tolerance for all three of the critical contaminants when compared to AZ91, but when the three contaminants are below their individual tolerance limits, the salt spray performance is again equal to or better than die cast 380 aluminum and cold rolled steel.

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