Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

Chime right in! (no registration req'd)

-----

"Hydrogen Embrittlement relief bake for zinc-nickel"



2005

I have 52100 steel parts to be zinc-nickel plated.
Is there a major problem with hydrogen embrittlement if I were to bake the parts at 300 F for 8 hrs approx. 1 hour after plating? I have consulted ASTM 850 and it sates that the parts have to be baked for an excess of 22 hrs at 190-220 C. Most plating vendors state that the bake time is extremly excessive and charge a huge price for the extra time. Can I get by with that bake time? Will the reduction in tensile strength be excessive if I don't go to the ASTM suggested bake time?

Joe Malinski
Product Engineer - Lansing, Illinois, USA
^


2005

Hydrogen embrittlement relief is a dangerous phenomenon in the catastrophic failure cases. Hence do not take any chance to minimise the duration.

The baking time does not reduce or increase the tensile strength of your part at 200°C It is to do with diffusing out the hydrogen using the potential difference of hydrogen between the atmosphere and the product. Since the volume and depth of hydrogen is more in product the duration of baking is defined high for complete diffusion.

v g rajendran
V. G. Rajendran
- Trichy, Tamilnadu, India
^


2005

Hydrogen bake at 200C will reduce hardness on hardened steel by about one Rc if the anneal temp was near the 200C.

James Watts
- Navarre, Florida
^

none
adv.
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 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA