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.
    no popups, no spam
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics

topic 9442

EN activation

(2001)

I have been asked to deposit hard chrome (.000050-.0001) over an electroless nickel surface (.015-.020) which has been post baked @400F (returned to the mfg.) then diamond turned. It must be a "clear" (no discoloration/cloudiness) coating... Any ideas outside of a cathodic, sulphuric activation?

Richard Newman
- Frankfort, Illinois


(2001)

Since you are going to plate in Cr you could activate the part in the chrome solution by applying just enough current to give the part a hydrogen wash but not enough current to plate any Cr. After the wash just ramp up the current to plate.

George Shahin
George Shahin
Atotech - Rock Hill, South Carolina



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 Comment 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


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.