Hydrogen embrittlement and brass? 1

[Fred]

The problem of hydrogen embrittlement of copper is known and linked to the oxgen content of the material. But I don't find anything concerning the embrittlement of brass. I would be grateful if somebody could give me some informations on this subject.
I'm also interesting on hydrogen embrittlement in general (recommended Materials, specifications, ...)

 

[gdodd]

Hydrogen embrittlement of ETP copper occurs when the copper oxide particles found dispersed throughout the microstructure react with hydrogen producing water.
Brass does not contain these particles so is not susceptible to this form of attack.

 

[Fred]

Thank you for your response but what about the other forms of attack. What do you think of the possible contribution of hydrogen on the stress corrosion cracking?

 

[gdodd]

Stress corrosion cracking or season cracking in brass is common in alloys containing more than 15% zinc exposed to ammonium solutions and mercury compounds. It is a phenomena which relies on the two things its name implies residual stress and a corrosive environment. I suggest if you would like more detail find a good book on corrosion or consult the ASM Metals Handbook volume 13.
Another form of attack is called dezincification which is more common in duplex brasses although not confined to them.
Good Luck