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Removing Black Stain from High Tensile Allen Bolt

Can any one sugest, how to remove black strain from high tensile allen bolts before zinc plating.

Suhail Ahmed
Plating Shop - Pune. Maharashtra, India
July 18, 2008

July 19, 2008

Hi, Suhail. Bead blast the stain away, and then plate, and you'll remove the potential problems of cleaning and acid activation.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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If you have a lot of volume, I suggest a mass finishing system; however, if the stain is in the recessed head, go with the blasting.

AF Kenton
retired business owner - Hatboro, Pennsylvania
July 22, 2008

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