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topic 54807

Prepare for electrical bond per HP14-30?




April 14, 2010

Hi,
I have a drawing that states prepare indicated surface for electrical bond per HP14-30. Does anyone know where I can find that document or what the process is? Thanks

Andrew Lauckner
Machinist - Wayne, New Jersey


April 16, 2010

Hi, Andrew. Are the parts made of aluminum? I think this is a chromate conversion coating / chem film spec., but I don't know the origin -- maybe Hewlett-Packard?

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"


April 18, 2010

HP spec of this variety are from Hughes - could be Hughes Helicopter, Mesa, AZ - now part of Boeing. Bonding in this sense typically means doing everything possible to eliminate any electrical resistance between 2 surfaces which can be from mechanically polishing, cleaning and/or chromate conversion coating - however, if the later, it would always be Class 3 as any chromate increases the electrical resistance between 2 surfaces.

milt stevenson jr.
Milt Stevenson, Jr.
Anoplate Corporation
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Syracuse, New York

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