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The surface condition of metals can have a significant effect on the outcome of high-temperature processes and vice versa. This chapter discusses the general cleaning and surface treatment needs of work in-process both before and after induction hardening. It identifies contaminants and defects associated with various quenchants and processing atmospheres and provides insights on how they can be removed and, in some cases, prevented. It also recommends the application of a rust preventative shortly after parts have cooled.

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