Metal finishers helping each other -- No cost, No registration, No damn popups
(we earn from 'affiliate link' purchases, making the site possible)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

Thread 343/34

Corrosion between chromate plated copper and zinc plated steel

I have a copper heatsink that has a bright dip chromate on it and I am bolting it to a steel chassis that has a zinc chromate plating on it. I am experiencing corrosion on both parts. What can be causing this and how can I stop it?

Chris Cutaia
manufacturing - Ontario, New York
2005
publicly reply to Chris Cutaia

2005

Hello Chris;

Try painting the heatsink black, or painting the zinc with an aluminium rich paint.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

publicly reply to Khozem Vahaanwala

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: