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Miyata Y.,Yokohama National University | Kuwahara Y.,Yokohama National University | Kuwahara Y.,Hinode Suido Ltd. | Asakura S.,Yokohama National University | And 4 more authors.
Electrochemistry | Year: 2014

The rate equation of hydrogen evolution reaction on spheroidal graphite cast iron which has different areas of graphite particles has been studied in sulfuric acid solutions at 298K. The cathodic Tafel slope of -0.125V/decade and the reaction order with respect to the activity of hydrogen ion of 1 are obtained by linear potential sweep technique. The cathodic current density due to hydrogen evolution reaction does not depend on the area of graphite particles. There is no difference in hydrogen evolution reaction mechanism between pure iron and spheroidal graphite cast iron. © The Electrochemical Society of Japan, All rights reserved. Source


Miyata Y.,Yokohama National University | Kuwahara Y.,Yokohama National University | Kuwahara Y.,Hinode Suido Ltd. | Asakura S.,Yokohama National University | And 4 more authors.
International Journal of Corrosion | Year: 2013

The rate equation of anodic dissolution reaction of spheroidal graphite cast iron in sulfuric acid solutions at 298 K has been studied. The cast irons have different areas of pearlite. The anodic Tafel slope of 0.043 V decade -1 and the reaction order with respect to the hydroxyl ion activity of 1 are obtained by the linear potential sweep technique. The anodic current density does not depend on the area of pearlite. There is no difference in the anodic dissolution reaction mechanisms between pure iron and spheroidal graphite cast iron. The anodic current density of the cast iron is higher than that of the pure iron. © 2013 Yoshikazu Miyata et al. Source


Miyata Y.,Yokohama National University | Kuwahara Y.,Yokohama National University | Kuwahara Y.,Hinode Suido Ltd. | Asakura S.,Yokohama National University | And 4 more authors.
Corrosion Engineering Science and Technology | Year: 2014

The rate equation of hydrogen evolution reaction of spheroidal graphite cast iron with different pearlite area has been studied in sulphuric acid solutions at 298 K. The cathodic Tafel slope of 20130 V/decade and the reaction order with respect to the activity of hydrogen ion of 1 are obtained by linear potential sweep technique. The rate equation of hydrogen evolution reaction does not depend on the area of pearlite. There is no difference in hydrogen evolution reaction mechanisms between pure iron and spheroidal graphite cast iron. © 2014 Institute of Materials, Minerals and Mining. Source

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