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
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
Lee
RE: Hydrogen Embrittlement _ bake times
RE: Hydrogen Embrittlement _ bake times
ASTM B850-98(2004) "Standard Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement".
RE: Hydrogen Embrittlement _ bake times
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
"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
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.