"30% Sulfuric Acid and 316L"


"My experience suggests that although there may be better alternatives such as a duplex grade, 316L should be a good alternative for use in a 30% sulfuric acid environment at room temperature. We recently took a sample of 316L, and placed in in 30% sulfuric acid solution at room temp. for 24 hrs., and the sample developed a black discoloration. Is this actually a corrosion product, and if so, do you know what it is? Am I incorrect in my belief that 316L should be suitable for this environment? Will 316L tend to experience some corrosion rate over time in this solution?"


The black corrosion product is probably a chromium oxide. I would not specify 316SS for long term use in room temperature, 30% sulfuric acid, especially where velocities are present. The passive film can be unstable.


 << return to the previous page ::


Contact Us

If you have questions or need our depth of experience to help with your issues...

Call us: 713-993-7007

Email us: info@hghouston.com


With a little delay, our Calculation of Ammonium Salt Deposition Temperatures...read more
Our sulfidic corrosion calculators are now available at hghouston.com/calcula...read more

Stay Current

Sign up for our quarterly newsletter

covering updates on corrosion

Sign Up