The corrosion behaviour of nickel in hydrogen chloride gas and gas mixtures of hydrogen chloride and oxygen at high temperatures |
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| Authors: | Yoshinao Ihara Hideji Ohgame Kazutaka Sakiyama Koji Hashimoto |
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| Affiliation: | Central Research Laboratories, Toyo Soda Manufacturing Co. Ltd., 4560 Tonda, Shin Nanyo, Yamaguchi 746, Japan;The Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai 980, Japan |
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| Abstract: | A kinetic investigation of corrosion of nickel in hydrogen chloride gases containing 0–75% oxygen at 400–700°C was carried out by the thermogravimetric method. There was no great difference in the corrosion behaviour of nickel in the hydrogen chloride gas and its mixtures with oxygen because of exclusive formation of NiCl2 scale, regardless of the gas compositions. The corrosion behaviour showed the mixed reaction mode; that is, NiCl2 scale formation according to parabolic kinetics and NiCl2 scale evaporation according to linear kinetics. With increasing temperature above 500°C, linear kinetics became predominant. |
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