Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (43권1호 31-35)

High Temperature Corrosion of Ni-17%W Coatings in Ar-0.2%SO2 Atmosphere

High Temperature Corrosion of Ni-17%W Coatings in Ar-0.2%SO2 Atmosphere

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Lee, Dong-Bok;Kwon, Sik-Chol;

School of Advanced Materials Science and Engineering, Sungkyunkwan University;Functional Coatings Group, Korea Institute of Materials Science;
School of Advanced Materials Science and Engineering, Sungkyunkwan University;Functional Coatings Group, Korea Institute of Materials Science;

DOI : 10.5695/JKISE.2010.43.1.031

Abstract

Coatings of Ni-17 at.%W were electroplated on a steel substrate, and their corrosion behavior was investigated between 600 and $800^{circ}C$ in an Ar-0.2%$SO_2$ atmosphere. They delayed the corrosion of the steel substrate. They were corroded into an outer NiO-rich layer, and an inner ($WO_3+NiO+NiWO_4$)-mixed oxide layer. Below these oxide layers, a sulfide layer gradually formed.

Keywords

Nickel;Tungsten;Sulfidation;Oxidation;Electroplating;