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Clear Chromate Finish in Zinc Electroplating and Duraplating



(-----) January 28, 2008

We are in business of Zinc electroplating of around 1000 Tons and then chrome finishing using tri/hexa chromate chemicals.All our products are meant for export to USA. Recently one of our customers wants Clear chromate finish only and Dura plating .We are not very clear about the process and seek answer to undermentioned questions
a)What is Dura Plating as applicable to steel products and Zinc plating?
(b) In What way it is different from Chrome finishing tri or hexa or is it a replacement for hard chrome plating ?
(c)Is Dura plating to be done after Zinc plating ?
(d)What chemicals are required for the same?
(e) What is the Process for the same?
(f)) What is clear Chromate finishing after Zinc plating?
(g)Which is the ideal product and process for Clear Chromate ,which one of the customer in US is insisting upon?
(j)What would be the colour of finished product after clear chromate finishing?

Mukteshwar Prasad
Involved with electrofinishing - Kolkata,West Bengal, India
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January 31, 2008

As we noted in response to your question 47605, Dura Plating is the name of a jobshop plater in the U.S.A., so if you need "Dura Plating" you would have to license it from them. But, yes, It could also be the name of other jobshop platers in China, Europe, South America, and South Africa as well. And if you ask long and hard enough, maybe you'll find someone who will claim it's just a generic thing in India. You really have to ask your customer for the details of what they want. The idea of asking readers to keep taking wild guesses at what your customer wants until you hear an answer that "will work" for you really isn't very practical. Good luck, but we're not going to post the question a third time :)

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