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Shot peening required before replating?

February 2, 2011

OEM book repair calls for shotpeening of base metal prior to chrome plating. We have a few cases of faulty chrome and need to strip and replate the part. Do you need to re-shotpeen the part prior to replate? Is the residual compression stress of initial shotpeening sufficient enough to not re-shotpeen the part? What are the effects of chrome plating, hydrogen embrittlement stress relieving and chrome strip on the peened substrate?

Wilson Canupin
Quality Inspector - Richmond, British Columbia, Canada

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