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Influence of elemental sulfur and mercaptans on corrosion of copper strips in the ASTM D-130 test by means of electronic microscopy (SEM) and energy dispersive X-ray (EDX)

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Summary

Crude petroleum contains sulfur compounds, most of which are removed during refining. The corrosivity of sulfur compounds present in petroleum products is measured by means of the ASTM D-130 copper strip test, which is based on discoloration of a standard copper strip immersed into the petroleum products at 50°C for 3 h. Here the corrosivity of copper strips are tested with elemental sulfur and different mercaptans in synthetic naphtha. The great corrosive power of elemental sulfur is 3.7 times higher than that of ethylmercaptan, the most corrosive among the different mercaptans. The elemental sulfur and ethyl-mercaptan corrosion distribution on copper strips is also studied by means of the ASTM D-130 test together with electronic microscopy (SEM) and energy dispersive X-ray (EDX) techniques. These non-destructive techniques allow to know the strip corrosive morphology and to determine the sulfur concentration on the strip.

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Authors and Affiliations

  1. Departamento Ingeniería Química y Nuclear, E.T.S.I. Industriales, Universidad Politécnica de Valencia, P.O. Box 22012, E-46071, Valencia, Spain

    J. García-Antón & J. L. Guiñón

  2. Departamento de Ingeniería de la Construcción, U. D. Química, E.T.S.I.C.C y P., Universidad Politécnica de Valencia, P.O. Box 22012, E-46071, Valencia, Spain

    J. Monzó

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  1. J. Monzó
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  2. J. García-Antón
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  3. J. L. Guiñón
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Monzó, J., García-Antón, J. & Guiñón, J.L. Influence of elemental sulfur and mercaptans on corrosion of copper strips in the ASTM D-130 test by means of electronic microscopy (SEM) and energy dispersive X-ray (EDX). Fresenius J Anal Chem 341, 606–610 (1991). https://doi.org/10.1007/BF00322271

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  • DOI: https://doi.org/10.1007/BF00322271

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