Carbonyl Sulfide: Potential Agent of Atmospheric Sulfur Corrosion

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Science  08 May 1981:
Vol. 212, Issue 4495, pp. 663-665
DOI: 10.1126/science.212.4495.663


Laboratory exposure experiments demonstrate that carbonyl sulfide in wet air corrodes copper at 22°C at a rate that is approximately linear with total exposure (the product of exposure time and carbonyl sulfide concentration). The corrosion rate is similar to that of hydrogen sulfide, a widely recognized corrodant. The much greater average atmospheric abundance of carbonyl sulfide compared with that of hydrogen sulfide or sulfur dioxide suggests that carbonyl sulfide may be a major agent of atmospheric sulfur corrosion.