Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Katsuo Sugahara is active.

Publication


Featured researches published by Katsuo Sugahara.


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 1995

Corrosion-resistant NiCrMo alloys in hot concentrated sulphuric acid with active carbon

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 NiCiMo 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

Nickel-based alloy with chromium, molybdenum and tantalum

Katsuo Sugahara; Hideo Kitamura; Saburo Wakita; Koji Toyokura; Yoshio Takizawa; Tsutomu Takahashi


Archive | 2003

Ni based alloy with excellent corrosion resistance to supercritical water environments containing inorganic acids

Katsuo Sugahara


Zairyo-to-kankyo | 2010

Effect of Ta Addition on Crevice Corrosion Resistance for Ni Based Corrosion Resistant Alloys

Hirokazu Sakai; Katsuo Sugahara; Hitoshi Saito


Archive | 2001

Hydrogen occluding alloy for battery cathode

Koichi Kita; Masahiro Wada; Katsuo Sugahara; Takeshi Isobe; Takuya Murai


Zairyo-to-kankyo | 1997

The Corrosion Behavior of Ni-Cr-Mo Ternary Alloys in Hot Concentrated Sulfuric Acids with Active Carbon (Part 3)

Katsuo Sugahara; Yoshio Takizawa; Eiji Akiyama; K. Hashimoto


Archive | 2004

Ni BASE ALLOY

Katsuo Sugahara


Zairyo-to-kankyo | 2000

MAT®21PAT, Corrosion Resistant Nickel-based Alloy

Katsuo Sugahara; Yoshio Takizawa


Zairyo-to-kankyo | 2011

Estimate of Crevice Corrosion Resistance of Welds in Ni-based Corrosion Resistant Alloys by Measuring of Repassivation Potentials for Crevice Corrosion

Katsuo Sugahara; Hirokazu Sakai; Hitoshi Saito


Corrosion | 2009

Ni-Based Corrosion-Resistant Alloys For Pharmaceutical Applications

Katsuo Sugahara

Collaboration


Dive into the Katsuo Sugahara's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar

Takeshi Isobe

MITSUBISHI MATERIALS CORPORATION

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Hideo Kitamura

MITSUBISHI MATERIALS CORPORATION

View shared research outputs
Top Co-Authors

Avatar

Koji Toyokura

MITSUBISHI MATERIALS CORPORATION

View shared research outputs
Top Co-Authors

Avatar

Saburo Wakita

MITSUBISHI MATERIALS CORPORATION

View shared research outputs
Top Co-Authors

Avatar

Tsutomu Takahashi

MITSUBISHI MATERIALS CORPORATION

View shared research outputs
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge