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Chloride corrosion of stainless steel
- Thread starter adt10
- Start date
EdStainless
Materials
If they are really dry you will have no issues, but I have seen even ambient humidity cause serious issues.
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P.E. Metallurgy, Plymouth Tube
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P.E. Metallurgy, Plymouth Tube
- Thread starter
- #4
Thank you for your responses. I just did a search, did not find anything applicable.
EdStainless,
In this application the air comes from a compressor. More than 94% of ambient moisture is removed in the inter-stage coolers. The remaining moisture is enough for CaCl2 to form mono and di hydrates, but not enough to make brine. In your experience with ambient humidity did CaCl2 adsorb enough moisture to make brine or did it stay solid? My suspicion is that even mono hydrate may have enough ionization so that Cl2 ions could attack the stainless steel. Your thoughts would be appreciated. Also would appreciate any literature reference you might have. Thanks.
EdStainless,
In this application the air comes from a compressor. More than 94% of ambient moisture is removed in the inter-stage coolers. The remaining moisture is enough for CaCl2 to form mono and di hydrates, but not enough to make brine. In your experience with ambient humidity did CaCl2 adsorb enough moisture to make brine or did it stay solid? My suspicion is that even mono hydrate may have enough ionization so that Cl2 ions could attack the stainless steel. Your thoughts would be appreciated. Also would appreciate any literature reference you might have. Thanks.
EdStainless
Materials
My hunch is that you are correct. Unless your air has a dew point below -40 I think that you will likely have issues.
Once you get a little hydration the material will be more likely to stick, and then it is all downhill.
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P.E. Metallurgy, Plymouth Tube
Once you get a little hydration the material will be more likely to stick, and then it is all downhill.
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P.E. Metallurgy, Plymouth Tube
Compositepro
Chemical
A brine will form on the pellets during the dehydration process.
- Thread starter
- #7
J Zhang, et al, Micro-Droplets Formation During The Deliquescence Of Salt Particles In Atmosphere, Corrosion, Vol 61, (12), 2005, pp 1167 - 1172.
Steve Jones
Corrosion Management Consultant
All answers are personal opinions only and are in no way connected with any employer.
Steve Jones
Corrosion Management Consultant
All answers are personal opinions only and are in no way connected with any employer.
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