Potassium Iodide compatability with S/Steel or Brass
Potassium Iodide compatability with S/Steel or Brass
(OP)
Hi all,
Has anyone had any experience with KI (5.5g/kg solution) with Brass or S/Steel. I searched for ages on the net, but can only find minimal info.
ANy suggestions of where to look next would be appreciated.
Craig
Has anyone had any experience with KI (5.5g/kg solution) with Brass or S/Steel. I searched for ages on the net, but can only find minimal info.
ANy suggestions of where to look next would be appreciated.
Craig





RE: Potassium Iodide compatability with S/Steel or Brass
Craig, you are right, it is difficult to find the information you want in the internet. However, if you make a mental switch to another, a bit more aggressive, salt: LiBr, you may find quite a lot of information on the net by looking for corrosion in absorption refrigeration units based on water/lithium bromide solutions. I hope this idea is of value.
RE: Potassium Iodide compatability with S/Steel or Brass
RE: Potassium Iodide compatability with S/Steel or Brass
As such likely one would find increasing resistance as moly increases in the stainless steels and nickel alloys. From least to most resistant. 304, 316L (2% Mo), 2205 (3% Mo), AL-6XN (6% Mo), C-276 (15-16% Mo).
Carpenter Technology publishes a bulletin on their Carpenter 20Cb-3 alloy that contains corrosion data on lots of materials in various solutions including potassium chloride and potassium bromide. Since we offer that material you could request it from www.rolledalloys.com, but I would not suggest Carpenter 20Cb-3 for this service.
RE: Potassium Iodide compatability with S/Steel or Brass
saxon
RE: Potassium Iodide compatability with S/Steel or Brass
I am glad that other people agree that it is hard to find information. Pitting corrosion was what I suspected would occur, and issues with crevice corrosion possibly.
Interesting that no-one has mentioned brass. Further research has sugested that de-zincification could be an issue, which makes me wonder why some of the valves on a current test rig are made of brass.
Thanks all.
Craig