finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
(current
topics)
topic 5465

Zinc-Nickel/Cobalt on Aluminum


(2000)

I am seeking information about zinc-nickel vs zinc-cobalt plating. What are the pros and cons of each when plated on cast aluminum. we are trying to phase out cadmium plating.

Another item I need info. on is that after product is plated with one of the two, what type of corrosion protection film that will be conductive when colored black.

Joseph Lomastro
- Miami, Florida


(2000)

Are you presently using a black finish on your Cadmium? What is the application, what kind of part, and where is it used?

tom pullizzi portrait
Tom Pullizzi
Falls Township, Pennsylvania


(2000)

I have read your question several times and wish to offer the following information. I have had experience with folks like yourself who wish to get rid of Cadmium.

Zinc/Nickel is far superior to Zinc/Cobalt with regard to Corrosion Resistance. My suggestion would be to prepare the aluminum casting and put a layer of Electroless Nickel on it. (Thickness to be determined by your needs). After this, plate a layer of 8-10 microns of Alkaline Zinc/Nickel followed by an iridescent chromate film. I have seen such a coating that surpassed 5000 hours to corrosion of the aluminum. Any follow up questions will be responded to.

ed budman
eb sig
Ed Budman
- Pennsylvania



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.