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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 4    December 1995

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CATALYTIC EFFECT OF FORMIC ACID UPON AMORPHOUS CHROMIUM ELECTRODEPOSITION
Wang Xianyou; Jiang Hanying; Guo Bingkun

Institute of Metallurgical Physicochemistry and New Materials; Central South University of Technology; Changsha 410083

Abstract:The characteristics and properties of amorphous chromium deposited from sulphuric acid-catalyzed chromic acidic solution containing formic acid have been investigated. Both bright and satisfactory amorphous chromium deposits have been obtained.The polarization curves on copper and vitreous carbon electrode and current efficiency of the electrolyte have also been examined.The results showed that formic acid was an effective catalyst for electrodeposition of amorphous chromium, which can inhibit reduction of Cr(Ⅵ) to Cr(Ⅲ) and hydrogen evolution,and increase cathodic current efficiency of amorphous chromium deposition.

 

Key words: amorphous materials; electrodeposition; catalysis; formic acid; chromium

ISSN 1672-7029
CN 43-1423/U

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