Corrosion mechanism of thermostable salts
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Thermostable salts are more or less present in amine-based desulfurization systems. It is generally believed that these thermostable salts can cause equipment corrosion, but what exactly is the mechanism by which they induce corrosion? Some sources state that the anions in thermostable salts react with FeS formed on the surface of the equipment, destroying this protective layer and thereby accelerating equipment corrosion. Do you all agree with this view?
Could someone tell me what the main components of thermally stable salts are?
Thermostable salts are alcohol amine salts formed by the combination of inorganic and organic anions as well as amino acid ions (products of the degradation of nitrogen-containing compounds) in the amine solution with alkanol amines
Reply to 2# adsl121: The main components of thermostable salts are formate, acetate, sulfate, chloride, thiosulfate, and thiocyanate. Depending on the raw materials used in the treatment process, the proportion of these components in the thermostable salts varies.
Does anyone knowledgeable know if there are thermally stable salts in the aMDEA decarboxylation solution? Thank you!
Acidic salts cause an increase in acidity； Excessive salt, electrochemical corrosion, etc
As long as it is an alcohol amine solution, over time or due to improper operation, more or less amounts of thermally stable salts will form
I agree regarding the corrosion of FeS