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 De-embrittlement"




1998

How do you hydrogen de-embrittle a 70/30 Tin-Zinc deposit, with thickness of 8 microns?

Natalie Chernow
^


1998

When hydrogen de-embrittling parts that have be plated with tin/zinc (70-80%tin), we have always expounded upon a low temp bake. That is 250 °F for 4 to 24 hours. Our fear was that the tin/zinc which is more like a metallic mixture than a true alloy will melt if the tin is too high in the alloy.

In Japan, I saw a fastener plater baking at 375 deg F for 4 hours. And that was on every part that they were plating. They experienced no melting, blistering, or resistance to taking a good chromate passivate.

If the Tin content is 70-80%, the melting point will be about 550 deg.F. By the way, this alloy is the only one not to have a microcracked surface. The deposits may be crimped or severely bent without sacrificing any of the corrosion resistance.

Typical corrosion resistance with a chrome passivate is in the order of 1000 - 1500 hours in salt spray. It is right at the top of the available alloys for protection.

If you have any further questions, please submit them to finishing.com and you will no doubt get a prompt answer.

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

^


2002

Hydrogen Embrittlement Test Process Specification required. This test is after zinc plating or before zinc plating. please specify.

Vinod Kaushik
Toyo Springs Ltd. - Sonepat, Haryana, India
^


2002

Hydrogen embrittlement treatment is performed by us as per the specification in IS for one EN9 Spring washer manufactured by us. We have seen good results after introducing the process. We do the plating and immediately it is kept in the furnace at 200 °C for 30 min. Afterwards the passivation process is done.

Nagarajan Iyer
- Baroda, Gujarat, India
^

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 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