Abstract
The electrochemical formation of elemental sulfur at stainless steel electrodes has been studied in aqueous solutions at temperatures between 298° and 373°K and a total pressure (with ) of 1.4 MPa. A deposit of sulfur was found only in solutions containing a low concentration of soluble iron (≲ 10−6 mole dm−3); at higher iron concentrations, pyrite and marcasite formation occurred. All three deposits formed from a common polysulfide intermediate, the nature of the deposit depending on the relative concentrations of soluble iron and polysulfide at the surface of the stainless steel.
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