Enhancement of Corrosion Resistance of Zinc Coatings Using Green Additives

Kumar, Punith MK and Srivastava, Chandan (2014) Enhancement of Corrosion Resistance of Zinc Coatings Using Green Additives. In: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 23 (10). pp. 3418-3424.

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Abstract

In the present work, morphology, microstructure, and electrochemical behavior of Zn coatings containing non-toxic additives have been investigated. Zn coatings were electrodeposited over mild steel substrates using Zn sulphate baths containing four different organic additives: sodium gluconate, dextrose, dextrin, and saccharin. All these additives are ``green'' and can be derived from food contents. Morphological and structural characterization using electron microscopy, x-ray diffraction, and texture co-efficient analysis revealed an appreciable alteration in the morphology and texture of the deposit depending on the type of additive used in the Zn plating bath. All the Zn coatings, however, were nano-crystalline irrespective of the type of additive used. Polarization and electrochemical impedance spectroscopic analysis, used to investigate the effect of the change in microstructure and morphology on corrosion resistance behavior, illustrated an improved corrosion resistance for Zn deposits obtained from plating bath containing additives as compared to the pure Zn coatings.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA.
Keywords:	corrosion; organic non-toxic additives; texture; Zn electrodeposition
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	08 Nov 2014 05:03
Last Modified:	08 Nov 2014 05:03
URI:	http://eprints.iisc.ac.in/id/eprint/50156

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