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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 1    February 2005

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Composite corrosion inhibitors for secondary alkaline zinc anodes
JIA Zheng(贾 铮), ZHOU De-rui(周德瑞), ZHANG Cui-fen(张翠芬)

Department of Applied Chemistry, Harbin Institute of Technology, 
Harbin 150001, China

Abstract:The corrosion inhibition property of PEG600 and In(OH)3 as composite corrosion inhibitors for secondary alkaline zinc electrodes was studied, and the inhibition efficiency was determined as 81.9%. The research focused on the mechanism by the methods of electrochemical impedance spectroscopy, polarization curves and IR spectroscopy. The results indicate that the corrosion inhibition effectiveness is attributed to the joint inhibition of anodic zinc dissolution and cathodic hydrogen evolution. And the anodic process is depressed to a greater extent than the cathodic process. The synergistic mechanism of the composite inhinbitors proves to be the enhancement of adsorption of PEG600 by In(OH)3. Potentiostatic experiment results and SEM images verify the inhibition of dendritic growth by the composite inhibitors.

 

Key words: secondary alkaline zinc anode; composite corrosion inhibitors; corrosion inhibition; synergistic effect; dendritic growth

ISSN 1672-7029
CN 43-1423/U

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