STP1148

    Formation of Copper Sulfide in Moist Air-Sulfur Dioxide

    Published: Jan 1992


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    Abstract

    Films formed on copper exposed to various sulfur-bearing environments were analyzed by XPS and electrochemical reduction to study the formation of copper sulfide. The S-2p photoelectron band showed the presence of copper sulfide in the film in addition to oxysulfur species. Coulometric reduction analysis of the film suggested that the sulfide was nonstoichiometric. The formation of copper sulfide was also noted on copper immersed in “sulfurous” acid and in sulfuric acid. The properties of the sulfide that formed reductively on copper from these oxysulfur environments were compared with those of copper sulfide that formed from a moist hydrogen sulfide environment. Formation of copper sulfide from the oxysulfur environments showed that sulfur could participate as a reducible species in the film-forming corrosion reactions.

    Keywords:

    atmospheric corrosion, copper, sulfur dioxide, hydrogen sulfide, XPS, coulometric reduction, sulfide, thin film


    Author Information:

    Chawla, SK
    Research scientist, Tata Energy Research Institute, New Delhi,

    Rickett, BI
    Graduate student and professor, Case Western Reserve University, Cleveland, OH

    Payer, JH
    Graduate student and professor, Case Western Reserve University, Cleveland, OH


    Paper ID: STP15052S

    Committee/Subcommittee: G01.04

    DOI: 10.1520/STP15052S


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