-- The Home Page of the Finishing Industry

on this site
current topics

60,000 Q&A topics -- Education, Aloha, & Fun

topic 8201

Can Cu Contamination Cause Stainless Steel Corrosion During Annealing?


During intermediate annealing in a Wekllman batch furnace during deepdrawing sinks, the 304 2B stainless material corrodes so heavily in some places that pickling doesn't help. The black oxides look like rinsing stains. On non-annealed blanks we found a copper contamination. Can copper cause corrosion at high temperatures (1000°C) when present on the surface of stainless steels?

Please help.

Peter Caenen
- Hasselt, Belgium


Copper will certainly oxidized to a black scale at 1000 °C and if there is enough copper there to form a molten metal state, the melted copper will probably penetrate into the stainless steel along the grain boundaries. If this occurs, relatively little copper on the surface could cause damage deep into the stainless steel. Metallographic examination could confirm this condition (or help identify other problems).

larry hanke
Larry Hanke
Minneapolis, Minnesota

this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

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 Compliance

©1995-2020, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.