Chloride Stress Corrosion Cracking w/o O2

[mjpetrag]

Can chloride stress corrosion cracking occur with stainless steels in the absence of dissolved oxygen?

-Mike

 

[rustbuster]

O2 will accelerate the phenomena, there is no clear answer regarding a lower O2 threshold where SCC will not occur.

 

[cloa]

Other oxidants such as ferric ions would not need the presence of oxygen

 

[EdStainless]

With no oxygen it will slow the initiation, but even a very small amount of any oxidizer will kick the process over.

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Plymouth Tube

 

[strider6]

As a reference you can look at iso 15156 / MR 0175 that deals also with Chloride Stress Corrosion Cracking in Oil&Gas. In part 3 you can find limits for SS.
There is also this paper that is useful for selecting materil in oil&gas and has a graph for SS 316.

http://www.stainless-steel-world.net/pdf/10073.pdf

http://www.corrosionist.com/Stainless_Steel_grades.htm

hope this help

S

Corrosion & Rust Prevention Control