-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 5978

Sulfur Depolarized Anodes for Nickel Strike


I would appreciate if anybody could tell me what is the sulfur depolarized anode which is used in nickel strike, and how can I make or buy it. Thanks

N. Dadvand
- Halifax, Canada


A sulfur depolarized anode has sulfur cast into it to aid in anode corrosion and keep the anode from going passive. Inco can supply them. You can also get them from an anode supplier like Carter Alloys Company [a supporting advertiser] or Tally Metal Sales.

But, to my knowledge, a strike bath usually operates at a sufficiently low pH that passivity is not usually a problem and regular pure nickel anodes are usually used to avoid nickel buildup.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

Ed. note: Inco no longer exists but became part of Vale Limited; sorry, we don't know whether nickel anodes are in their Vales's product line anymore.


SD nickel should not be used in a woods strike tank. Your nickel content will rise much faster and the sulfur is a slow poison for the tank. Using SD will make the tank stink, turn a dirty dark color and require considerably more filtration and carbon treatment and will still have to be replaced much sooner for adhesion related problems.

James Watts
- Navarre, Florida


I agree with both Ted and James. However, it is not necessarily the pH that determines the passivity of regular nickel. The most important component for dissolving regular nickel is the chloride content of the bath. As long there are sufficient chlorides in the bath regular nickel should dissolve just fine. SD nickel was developed and is used extensively in electroforming where controlling plating stress requires baths of low or no chloride content.

Don Piett
INCO Ltd - Thompson,Manitoba, Canada

If you have a question in mind which seems off topic, please 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, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.