Physiochemical characterization of Sn-Zn coatings electrodeposited from an acidic chloride bath in the absence of complexing agent

Nor Hairin, Assayidatul Laila and Othman, Raihan and Rizal, Faireez and Mohd Daud, Farah Diana (2017) Physiochemical characterization of Sn-Zn coatings electrodeposited from an acidic chloride bath in the absence of complexing agent. International Journal of Current Science, Engineering & Technology, Original Research Article | Open Access | AMCT 2017 Malaysia | Special Issue, Special issue. pp. 493-498. ISSN 2581-4311

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Abstract

The purpose of this study is to identify theZn2+ions concentrationat Sn-Zn coating which could be produced in the absence of a complexing agent. The electrolytic bath comprised of SnCl2 and ZnCl2. The ionic mole ratio Zn2+/Sn2+ of the electrolytic bath studied were 1:2, 1:1, 2:1, 4:1 and 10:1. Pure Zn and Sn electrodeposits were also prepared. The deposition process was performed at constant current of 5 mA and deposition time of 120 min. The electrodeposits were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that in the absence of complexing agent, even an electrolytic bath with Zn2+/Sn2+ ionic ratio of ten folds could not produce Zn-rich of Sn-Zn electrodeposits. Further, a unique method has been introduced to characterize the electrodeposits i.e. using the metal-air electrochemical cell. In this method, the electrodeposits were coupled with an air electrode in an alkaline electrolyte (6 M KOH) and discharged at 1 mA. Specific metallic element content will produce a distinct discharge profile thus enables it to be used in characterizing alloys or composites.

Item Type:	Article (Journal)
Additional Information:	7683/69740
Uncontrolled Keywords:	Tin-zinc electrodeposits, Electroplating bath, Electrodeposition, Metal-air characterization
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr Assayidatul Laila Nor Hairin
Date Deposited:	01 Feb 2019 10:19
Last Modified:	16 Jul 2019 18:36
URI:	http://irep.iium.edu.my/id/eprint/69740

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