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Characteristics and corrosion performance of 80Ni-20Cr coating deposited by on-site thermal spraying

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Abstract

New controlled atmosphere on-site spraying systems were developed to deposit a high-quality coating with superior resistance to wet corrosion. Characteristics and corrosion resistance of coatings deposited by arc and flame spraying of wire in argon gas were compared with those of coatings deposited by conventional and low-pressure plasma techniques. It was found that the coating deposited by the arc spraying of wire in argon gas is free of oxides and possesses excellent corrosion resistance in chloride and acid solutions. The coating suffers slight pitting and crevice corrosion associated with the isolated pores and electric potential paths. Corrosion resistance was improved by using a modified spraying system.

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Authors and Affiliations

  1. Dept. of Mechanical Engineering, Aoyama Gakuin University, College of Science and Engineering, Tokyo, Japan

    M. Takemoto (Professor)

  2. Kanmeta Engineering Co. Ltd., Osaka, Japan

    G. Ueno (President)

Authors
  1. M. Takemoto
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  2. G. Ueno
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Takemoto, M., Ueno, G. Characteristics and corrosion performance of 80Ni-20Cr coating deposited by on-site thermal spraying. JTST 2, 59–68 (1993). https://doi.org/10.1007/BF02647424

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  • DOI: https://doi.org/10.1007/BF02647424

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