-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 12512

Cad Plating Hydrogen Embrittlement Relief Ovens


I'm a Materials, Processes, and Environmental Technologist at a military repair and overhaul facility. We have in house capability for a number of metal treatments, including Cadmium plating. My current problem is with our hydrogen embrittlement relief oven for cadmium plated parts. The oven currently in use is not vented. We run at a temperature of 375 ± 25 degrees F. As far as I can tell, the temperature is not high enough to vaporize the cadmium, sodium cyanide, or any other materials besides water that may be present as a result of the plating, but is there something I'm missing? Should our oven be vented?

Ryan Anderson
IMP Aerospace - Halifax, N.S., Canada


I don't think cyanide has much to do with anything; presuming the parts have been well rinsed, the cyanide concentration is probably lower than some other things you might put in an oven at a similar temperature like lima beans, almonds, and apples.

Nor does it sound like the cadmium is an issue. According to the booklet 'Using Cadmium Safely--A Guide For The Workplace': "Fume is given off when the metal is heated above its melting point, as in welding". The melting point is about 321 degrees C, which is over 600 degrees F.

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


Even lab ovens are vented to the lab. I have never seen a process oven that did not have a variable opening on the back or on the top.

If you mean power venting, I would say that it is not required. Any vent hole should probably be piped to the roof and possibly to the outside. It is a cheap fix if anyone is concerned. I have never heard of an oven operator having cadmium poisoning from the oven air/exhaust.

James Watts
- Navarre, Florida

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