316 SS - CORROSION in Stagnant Ground Water
316 SS - CORROSION in Stagnant Ground Water
(OP)
Is 316 SS, susceptible to pitting/crevice corrosion in stagnant groundwater at less than 30 deg C. with chloride in the range of 2000 ppm. Also possibility of MIC (SRB) corrosion in swampy.





RE: 316 SS - CORROSION in Stagnant Ground Water
You will eventually get pitting at the ground air interface. From what I've seen pitting isn't really a big problem as the pits are very shallow. The only thing you will notice is the pipe will be a little rusty.
RE: 316 SS - CORROSION in Stagnant Ground Water
-possibility of crevice conditions
-possibility of evaporation and concentration of chlorides
-condition of the exposure, fluid velocity; stagnant water will cause the steel to become active if no oxygen will reach the steel surface
-composition of the weater and possibility of MIC
-temperature..
In my opinion in your conditions you'll have the possibility of either pitting and crevice.
The acceptable limit of chloride is also a function of the criticality of your service.
Stainless Steel Corrosion
GUIDELINES FOR SELECTION OF NICKEL STAINLESS STEELS FOR MARINE ENVIRONMENTS, NATURAL WATERS AND BRINES (1987) (pub. 1987)
http://w
S.
Metal Corrosion