Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
(OP)
I have read the stainless and sulfuric acid posts and looked at the references out of them.
The charts and articles I have found seem vague at these low concentrations. In your opinions is 304L SS piping acceptable in a 0.04wt% sulfuric acid stream at 120 deg F? Are there any specific references I should use for data at this concentration.
Thank you.
The charts and articles I have found seem vague at these low concentrations. In your opinions is 304L SS piping acceptable in a 0.04wt% sulfuric acid stream at 120 deg F? Are there any specific references I should use for data at this concentration.
Thank you.





RE: Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
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Flow rate matters (note, quote is for concentrated sulfuric at ambient T):
"The materials of construction for piping are dependent on fluid flow velocities and quality concerns. In general, seamless carbon steel piping is used for flow velocities between 1-3 feet per second (fps). 316 SS is acceptable for flow velocities of 0-8 fps. Alloy 20 works for flow velocities of 0-20 fps, and TeflonĀ®-lined pipe works for all ranges of fluid velocity. If iron contamination is a concern for the process, stay away from carbon steel. These recommendations assume ambient temperatures. All metal piping should be welded per "ANSI B31.3 - Normal Service" specifications. Screwed fittings are discouraged. PVC and CPVC piping is recommended for vent/vapor lines only. They are not recommended for liquid service."
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For dilute solution at 120 oF, why not use CPVC?
RE: Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
It should be noted that the presence of any chlorides will tip things in favor of 316.
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RE: Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
RE: Corrosion resistance of 304SS to dilute 0.04% sulfuric acid
RE: Corrosion resistance of 304SS to dilute 0.04% sulfuric acid