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Corrosion Characteristics of New Superalloy Under Industrial Environmental Conditions

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Abstract

Corrosion behavior of new superalloy was studied in industrial environment at different temperatures by using various selected electrochemical techniques. The results revealed that the alloy is able to form protective oxide scale on its surface at higher temperatures and consequently the corrosion rate is low. The new alloy is found to degrade due to pitting corrosion at 40 and 50 °C and general corrosion at 25 °C. The scanning electron microscope results confirmed the electrochemical results. The energy-dispersive spectroscopy results confirmed the presence of oxides of nickel and alloying elements present in the superalloy. Based on the results obtained with different techniques, the alloy is recommended to fabricate different components for industrial applications with suitable protective coatings.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, University of Texas at El Paso, El Paso, TX, USA

    I. V. S. Yashwanth

  2. Defence Metallurgical Research Laboratory, Kanchanbagh PO, Hyderabad, 500 058, India

    I. Gurrappa

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  1. I. V. S. Yashwanth
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  2. I. Gurrappa
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Correspondence to I. Gurrappa.

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Yashwanth, I.V.S., Gurrappa, I. Corrosion Characteristics of New Superalloy Under Industrial Environmental Conditions. J. of Materi Eng and Perform 26, 6057–6063 (2017). https://doi.org/10.1007/s11665-017-3042-7

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  • DOI: https://doi.org/10.1007/s11665-017-3042-7

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