Abstract
Abstract The trend in recent years has been towards lower and lower carbon levels in corrosion resistant stainless alloys. This has led to a problem of growing significance for suppliers and users of alloy castings, the problem being surface carburization of castings which can result from reactions occurring at the metal-mold interface during casting and solidification. In this study, the nature and extent of surface carburization were determined for stainless alloy castings poured in various mold environments. The effect of surface carburization on the rate and mode of corrosion attack in the Huey and Streicher tests was also determined. Measures are presented for controlling surface carburization through the use of appropriate casting processes.
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