日本金属学会誌

J. Japan Inst. Metals, Vol. 32, No. 10 (1968),
pp. 960-965

Electrochemical Characteristics of Fe-Cu-Sb, Fe-Cu-Se, Fe-Cu-Sn and Fe-Cu-As Alloy Systems in Sulfuric Acid

Akira Teramae1, Satoshi Kado1 and Riichi Todoroki1

1Central Research Laboratories, Fuji Iron and Steel Co.Ltd., Sagamihara

Abstract:

As mentioned in a previous report, antimony, selenium and arsenic were found to be effective elements on corrosion resistance of steel in sulfuric acid together with coppere. In order to investigate electrochemically these behaviors of antimony, selenium, arsenic and tin together with copper, the polarization characteristics of these elements were determined by the rotating electrode method in 40% sulfuric acid at 60°C.
As for the individual effect, selenium was more effective and the others were less effective than copper. Selenium inhibited both anodic and cathodic reactions. Anodic inhibition by selenium was accelerated in coexistence with copper, but cathodic reaction was little affected. Antimony and arsenic inhibited the anodic reaction. In coexistence with copper, arsenic promoted the anodic inhibition by copper, but antimony showed the combined effect with copper and inhibited both anodic and cothodic reactions. The effect of antimony was strongest for the corrosion resistance of steel in sulfuric acid. Tin had no effect on polarization characteristics.


(Received 1968/4/9)

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