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"Pretreatment for powder coating on aluminium castings"





January 12, 2010

What is the correct pre-treatment process for PDC aluminium casting powder coating?
Is it Choromatising or phosphating ?
Pl. help me

C Suresh
QA - India
^


January 12, 2010

Hi, C. Phosphatizing solutions properly adjusted for "mixed metal" can be satisfactory, but chromate conversion coating is the best of the "old" technologies. With the world unhappy about shipping parts with hexavalent chromate on them, though, you might consider the new proprietary technologies.

Regards,

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