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Na2SO4-induced accelerated oxidation (hot corrosion) of nickel

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Abstract

The Na2SO4-induced accelerated oxidation of nickel has been studied at 1000°C. It has been found that low oxygen activities in the Na2SO4, which are produced by the formation of NiO, cause the sulfur activity of the Na2SO4 to be increased. Nickel and sulfur from the Na2SO4 combine to form nickel sulfide and the oxide ion activity of the Na2SO4 is increased. The accelerated oxidation of nickel occurs because oxide ions react with NiO to form a nonprotective oxide scale. The accelerated oxidation of nickel is not self-sustaining since oxide ions are not produced when conditions in the Na2SO4 are no longer favorable for the formation of nickel sulfide.

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Authors and Affiliations

  1. Advanced Materials Research and Development Laboratory, Pratt & Whitney Aircraft, Middletown, Conn.

    J. A. Goebel (Senior Research Assistant) & F. S. Pettit (Senior Research Associate)

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  1. J. A. Goebel
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  2. F. S. Pettit
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Goebel, J.A., Pettit, F.S. Na2SO4-induced accelerated oxidation (hot corrosion) of nickel. Metall Trans 1, 1943–1954 (1970). https://doi.org/10.1007/BF02642794

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