-- The Home Page of the Finishing Industry

on this site
current topics
The world's most popular metal finishing site, and the internet's friendliest corner

topic 17866

Hydrogen embrittlement?


I have been specifying Teflon coated hi tensile bolts for sub sea use for some time and now need an alternative. Will cad plated studs/bolts cause hydrogen embrittlement if used in a sub sea environment @ about 50 centigrade? Sac anode CP is applied.


Gary Evans
- Perth, Australia


It sounds like you need to perform some testing which simulates this environment. Typically, a notched tensile is prepared with the cad plate and are load tested. A certain percentage of the failure load( depending to what standard you are working to ) is applied (around 75% of the breaking load) statically to another notched tensile for a specified period i.e 8 days. If it breaks before the required duration then the conclusion is hydrogen embrittlement.

M Hogan
- Melbourne


Why do not use titanium alloy bolts?

Andrey Igolkin
- St.Petersburg, Russia

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 ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.