Katsuo Sugahara
MITSUBISHI MATERIALS CORPORATION
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Featured researches published by Katsuo Sugahara.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 1995
Yoshio Takizawa; Katsuo Sugahara
Abstract Dewpoint corrosion by sulphuric acid has often been observed in the heat exchangers of coal-burning plants. If ashes contain active carbon, corrosion becomes particularly serious. Various nickel-base alloys with high corrosion resistance in such environments have been designed. The corrosion behaviour of these alloys was examined in hot concentrated sulphuric acid with and without active carbon. The corrosion resistance of ternary NiCiMo alloys in the acids without active carbon increases with increasing alloy molybdenum content. When active carbon is added to the acids, the corrosion rate increases significantly. This is due to acceleration of transpassive dissolution of molybdenum as a result of enhancement of cathodic activity with the addition of active carbon. The corrosion resistance in the acids with active carbon is enhanced by an increase in alloy chromium content, which improves the passivity in the acids.
Archive | 1994
Katsuo Sugahara; Hideo Kitamura; Saburo Wakita; Koji Toyokura; Yoshio Takizawa; Tsutomu Takahashi
Archive | 2003
Katsuo Sugahara
Zairyo-to-kankyo | 2010
Hirokazu Sakai; Katsuo Sugahara; Hitoshi Saito
Archive | 2001
Koichi Kita; Masahiro Wada; Katsuo Sugahara; Takeshi Isobe; Takuya Murai
Zairyo-to-kankyo | 1997
Katsuo Sugahara; Yoshio Takizawa; Eiji Akiyama; K. Hashimoto
Archive | 2004
Katsuo Sugahara
Zairyo-to-kankyo | 2000
Katsuo Sugahara; Yoshio Takizawa
Zairyo-to-kankyo | 2011
Katsuo Sugahara; Hirokazu Sakai; Hitoshi Saito
Corrosion | 2009
Katsuo Sugahara