Asian Journal of Research in Chemistry

M. Sherin Banu ¹, V. Raj ², M. Mubarak Ali ³

Affiliations
1 Department of Chemistry, Government Arts College, Salem-636 007, Tamil Nadu, IN
2 Department of Chemistry, Periyar University, Salem-636 011, Tamil Nadu, IN
3 School of Display and Chemical Engineering, Yeungnam University, Gyeongsan, KR

Abstract

Immersion tin coatings were formed directly on aluminium by microwave irradiation from acidic tin chloride bath. The corrosion resistance behaviour of the coatings was studied by Tafel polarization and EIS. The effects of bath composition, temperature and irradiation time on the kinetics of immersion plating of tin onto aluminium were investigated. The surface morphology of the coatings has been analyzed by SEM. The phase composition of the coatings was analyzed by X-Ray Diffraction. The deposit structure is found to be more crystalline. It is found that the deposited tin is dissolved again after a long time immersion in plating solution.

Keywords

Aluminium, Tin Immersion Plating, Corrosion Resistance and X-Ray Diffraction.

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M. Sherin Banu ¹, V. Raj ², M. Mubarak Ali ³

Affiliations
1 Department of Chemistry, Government Arts College, Salem-636 007, Tamil Nadu, IN
2 Department of Chemistry, Periyar University, Salem-636 011, Tamil Nadu, IN
3 School of Display and Chemical Engineering, Yeungnam University, Gyeongsan, KP

Abstract

Molybdate conversion coatings (MCC) were formed directly on aluminium by simple chemical immersion method at various time intervals, temperatures from various bath composition. The influence of process parameters such as temperature, immersion time and concentration of the corrosion resistance behaviour and surface morphology was studied. The corrosion resistance behaviour was studied by Tafel polarization and Electrochemical Impedance Spectroscopy. The surface morphology of the coatings has been analyzed by Scanning Electron Microscope. The elemental compositions of the coatings are analyzed by Energy dispersive X-ray spectroscopy (EDX).

Keywords

Aluminium, Molybdate Conversion Coatings, Corrosion Resistance, Surface Analysis.

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