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

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 3104

Zinc nickel


1999

European motor manufacturers are insisting that many vehicle components be zinc nickel plated and not acid or cyanide zinc plated. Can anyone please advise on an easy and cheaper way of converting an existing acid zinc plant, both barrel and rack plating, to a zinc nickel plant without having to dump and start over again. Is there a way of converting the solution over a period of time. Apparently there are 2 ways of doing zinc nickel plating. Which way in the best? We are in need of detailed technical assistance.

John Mattisson
plating - South Africa


1999

Dear Mr Mattison ,

Yes indeed there are two forms of Zinc - Nickel plating , one acid the other alkaline , and yes conventional acid Zinc can be converted to Acid Zinc - Nickel . the procedure is relatively simple , and control of the Nickel level is relatively simple . Have you not spoken to your local "Suppliers" about this? Best regards

John Tenison-Woods
John Tenison - Woods
- Victoria Australia


1999

Dear Mr. Mattison:

I have not been to happy with any of the acidic zinc/nickel formulations that I have encountered, except for reel to reel strip line plating. The constant current density takes advantage of the fact that you will see higher nickel in the low current areas of complicated parts.

The alkaline baths on the market are not convertible from other processes. Cyanide Zinc can NEVER be used, as it forms Nickel Tetracyanide complex. As little as 30 PPM will totally destroy a bath.

There are several vendors selling zinc/nickel technology today. Be sure that the European firm tells you whether they want a low percentage or a high percentage for nickel codeposition. The low plates at 5 - 9%Nickel; the High at 10 - 15% Nickel. In Europe, some automakers specify a bake at 120 deg.C. for 24 hours to the passivated zinc/Nickel prior to entry into Salt Spray testing. Then they want 240 hrs to white corrosion. A difficult feat for the low percentage.

ed budman
eb sig
Ed Budman
- Pennsylvania

With deep sadness
we announce that
our friend Ed passed
away Nov. 24, 2018




If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT 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


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.