316L used in 98% sulfuric acid with chlorides
316L used in 98% sulfuric acid with chlorides
(OP)
Hi all,
I would like to know if 316L is suited for the 98% sulfuric acid with chlorides content from 500ppm to 1000ppm, will chloride ion still accelerate the pitting for S.S in 98% sulfuric acid? And what is the corrosion rate versus chloride concentration? many thanks.
I would like to know if 316L is suited for the 98% sulfuric acid with chlorides content from 500ppm to 1000ppm, will chloride ion still accelerate the pitting for S.S in 98% sulfuric acid? And what is the corrosion rate versus chloride concentration? many thanks.





RE: 316L used in 98% sulfuric acid with chlorides
<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying " Damn that was fun!" - Unknown>>
RE: 316L used in 98% sulfuric acid with chlorides
98% sulfuric with a few thousand ppm Cl will work in 904 up to at least 30C. I don't know about hotter. Forget a lower Ni grade, they won't cut it.
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Plymouth Tube
RE: 316L used in 98% sulfuric acid with chlorides
RE: 316L used in 98% sulfuric acid with chlorides
In my opinion, based also on the isocorrosion graph and table of Outokumpu linked below, Stainless Steel is not suitbale in your conditions.
As you can see in the graph for Sulfuric Acid + Chlorides Stainles Steel 316L (17-12-2.5 in the graph)is not included.
Sulfuric Acid Isocorrosion for Stainless Steel
http:
Sulfuric Acid + Chlorides
http:
hope this help u
S.
Corrosion Prevention & Corrosion Control
RE: 316L used in 98% sulfuric acid with chlorides
I agree with you that[SO4]2- will increase the passivity of S.S, while Chloride will accelerate the corrosion, my understanding is there should be a limitation, I mean when there are a lot of [SO4]2-, does chloride still can effect the corrosion?
I had the graph of Outokumpu, I thought they did't have the actual data for this service condition, so they didn't show it on the graph. hope my understanding is not wrong.
thanks
RE: 316L used in 98% sulfuric acid with chlorides
S.
Corrosion Prevention & Corrosion Control
RE: 316L used in 98% sulfuric acid with chlorides
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Plymouth Tube