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  • Users: rdcmc
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  1. rdcmc

    7075-T6 Impact

    We are Chromate Conversion coating a part that is made of 7075-T6 al. Recently the parts started showing black spots on the machined areas after cleaning. This area will develop a white "fuzz". Once wiped off the area is left blackened and will not chromate efficiently. We have ruled out...

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