×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Hydrogen Embrittlement _ bake times
6

Hydrogen Embrittlement _ bake times

Hydrogen Embrittlement _ bake times

(OP)
Question: Is there a chart or book that tell the bake time &
temp to remove the hydroger from the perant material in the
cab,chrome,etc. plate (electro Plate) process.... How long to bake ? At what temp ? Thanks for your help.. ipcrus

Ps. sorry about the spelling... Went to school to eat my lunch  

RE: Hydrogen Embrittlement _ bake times

A document written specifically for that purpose is AMS 2759/9, available from the Society of Automotive Engineers.  Their website is www.sae.org, and you can get some more information on the specification there.

Lee

RE: Hydrogen Embrittlement _ bake times

ASTM also has a standard for this:
ASTM B850-98(2004) "Standard Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement".

RE: Hydrogen Embrittlement _ bake times

ipcrus,
Look out in this web page for the technical report regarding Hydrogen Embrittlement.
http://www.surtec.com/TechnicalLetters.html
It may be useful. Good Luck !

Best regards,
ct

RE: Hydrogen Embrittlement _ bake times

I have a book entitled:

"Welding Steels without Hydrogen Cracking" by Bailey et.al. (published by Abington Publishing and distributed through ASM International).

It may give you some more insight.

~NiM

RE: Hydrogen Embrittlement _ bake times

See http://www.ionscience.com/Pages/HydroConfPapers.htm for a great tool.  Note free NACE papers including;
 
C.N.Brown, M.J.Carroll, F.W.H.Dean, J.H.Harrison, A.Kettle, 'Applications of Hydrogen Flux Monitoring to Pre-Weld Bakeouts of Steel', Corrosion 2004, Paper 04477, NACE, New Orleans. Abstract: During a pre-weld bakeout, hydrogen efflux was monitored in real time using the hydrogen collection method at high temperatures. A circular section of a 50 mm thickness alkylation unit acid storage vessel dome which had developed severe hydrogen blistering was removed, and pre-weld bake-out applied using heat pads placed within twelve inches of the cut-away section perimeter, on the dome’s exterior face. A ring of eight hydrogen collection probes were placed under the heat pads, about six inches from the cut-away perimeter. One probe became blocked and failed to deliver measurement. The remaining seven delivered flux values indicating effective bake-out at five sites, and the need for extended bake-out at two neighboring sites. The efflux trend at these sites strongly indicated initially high concentrations of hydrogen liberated by the bake-out. Corresponding efflux measurements at corresponding positions on the dome’s interior face were much lower. A model of hydrogen diffusion for the bake-out, incorporating a high density of trapping sites located at depths of 5-15 mm beneath the monitored exterior face provided model flux transients consistent with field flux transients and spot measurements. The work demonstrated that pre-weld heat treatment can be assessed, extended or reduced in real time, on evidence provided by spot high temperature hydrogen efflux measurements at a small number of sites. An additional bake-out is presented in which near zero hydrogen effluxed.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources