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Lead Cathodes vs ELV/RoHS

Hi

We use Lead cathodes in our Anodizing Process. The electrolyte is Sulfuric Acid. The new customer wants us to confirm that the Lead can not be a part of the coating. We have checked our components in a well equipped laboratory for lead in the coating, in which the results show that the Lead in ppm level where as ELV says 0.1 % of Lead allowed in the coating.

We are thankful in advance for your experiences shared with us on the lead dissolution in the bath and its participation in the Anodizing process.

Best regards,

Shiva Ramakrishnan
Plating Engineer - Chennai, India
March 28, 2008

Hi, Shiva. It is possible to convert to aluminum cathodes for greater electrical efficiency, but I have never personally heard of lead cathodes causing non-compliance with RoHS, and don't understand electrochemically how they could cause lead to be absorbed by the anodized parts. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 28, 2008

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