Corrosion of Steels in Boiling Potassium Carbonate Saturated With Carbon Dioxide and Hydrogen Sulfide

Corrosion rates of carbon and stainless steels were determined in boiling solutions of potassium carbonate saturated with carbon dioxide and hydrogen sulfide. Solutions saturated with carbon dioxide were highly corrosive to carbon steel and slightly corrosive to Type 304 and 347 stainless. Type 410 stainless behaved similarly to carbon steel. Monel was even more resistant to attack. The addition of only 0.3 percent of hydrogen sulfide to the carbon dioxide reduced corrosion rate of the carbon steel by 96 percent. Boiling solutions of carbonate saturated with hydrogen sulfide were noncorrosive. 4.3.6