Hydrogen stress cracking 2

[robot6]

Folks,

I have been interested in hydrogen stress cracking and material selection. I have read the following page,

http://corrosion-doctors.org/Forms-HIC/embrittlement.htm

Do you have any other interesting references? This page suggests that atomic hydrogen may be the cause. I wonder if this kind of cracking does not occur if the pipe is strictly carrying molecular hydrogen. What do you think, and do you have a reference?

Thanks so much for the help.

 

[metengr]

Here is a reference;

http://books.google.com/books?id=5v...epage&q=hydrogen embrittlement theory&f=false

For piping containing hydrogen, there is a standard for conveying hydrogen gas;

https://www.asme.org/products/codes-standards/hydrogen-piping-and-pipelines

 

[robot6]

Fantastic book. Clearly states that hydrogen gas can cause stress fractures, page 32. The standard will also be helpful for designing the system.

 

[blacksmith37]

There are about 20 common names for the same failure mechanism; and I guess 20 books, and the NACE MR 01-75.

 

[Shmulik]

API RP 941

http://link.springer.com/search?query=Reducing+the+Risk+of+High+Temperature+Hydrogen+Attack