Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989







-----

Cyanide free cadmium plating



2000

I'm a chemistry lecturer at a university in South Africa. A local manufacturer of automotive parts, asked me for information on cyanide-free cadmium plating. Unfortunately all the libraries here have only books dating from the 1940's and earlier when cyanide plating was the only workable option.

Are there commercial processes for cyanide-free cadmium plating? Where can I obtain more info?

Johann L Fischer
Rand Afrikaans University - Johnnesburg, Gauteng, South Africa



2000

Yes, there are commercially viable cyanide-free cadmium plating processes based on cadmium sulphate or cadmium fluoborate. If you go to any of the major manufacturers of plating solutions I think they will be able to offer you a process.

My personal opinion is that switching to cyanide-free cadmium plating is sometimes a mistake because it lulls people into a totally unwarranted sense of security. Yes, cyanide is an acute poison. But cadmium is a cumulative poison.

As common as cyanide cadmium plating is, I've never seen the air filled with cadmium oxide dust in a cyanide shop; and as rare as acid cadmium is, I've already seens clouds of cadmium oxide in cyanide-free shops a couple of times. For the safety-conscious person, this one is a tough call.

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



2000

Dear Sir:

I would suggest that the automotive company follow in the footsteps of most of the world's auto makers. That is to eliminate Cadmium completely. The automakers have gone to either zinc plating (with better passivates), or to Zinc alloys such as : Zinc/Nickel; Zinc/Iron; Zinc/Cobalt; or even Tin/Zinc.

In accordance with the Brussels protocol, no automobile in the European Community will be able to be recycled if there is Cadmium plating on it. Further, they also state that Hexavalent chromates will not be permissible passivates for the sacrificial plated coatings. Non Chromate passivates, or trivalent passivates are currently being worked on worldwide.

ed budman eb sig
Ed Budman [dec]
- Pennsylvania
With deep sadness we advise that our friend Ed passed away Nov. 24, 2018




2000

I have run both cyanide cad and sulfate cad. The output of each was quite similar. The cyanide cad was much easier to keep in balance. The three component additives that we used are no longer made, not enough demand. It was the very old 3M system.

Current additive use a chemical that I forget the name of, but it smells like dead fish and is a regulated material.

The future is in the alloy zinc. If they are going to drop cyanide, they might as well make the switch to alloy zinc.

James Watts
- Navarre, Florida


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA