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Raj, V.
- Immersion Plating of Tin on Aluminium by Microwave Irradiation in Acidic Medium
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Authors
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
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
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1726-1731Abstract
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.- Bath Optimization and Corrosion Study of Ni-P on Zincated Aluminium from Glycine Bath
Abstract Views :179 |
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Authors
Affiliations
1 Department of Chemistry, Kandaswami Kandar’s College, Paramathi-Velur-638 182, Tamil Nadu, IN
2 Advanced Materials Research Laboratory, Periyar University, Salem-636 011, Tamil Nadu, IN
1 Department of Chemistry, Kandaswami Kandar’s College, Paramathi-Velur-638 182, Tamil Nadu, IN
2 Advanced Materials Research Laboratory, Periyar University, Salem-636 011, Tamil Nadu, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 12 (2011), Pagination: 1898-1904Abstract
Electroless deposition is a fascinating technique by which smooth, uniform and highly adherent deposits can be obtained. It is one of the best and cost effective method. In this method, nickel-phosphorus (Ni-P) coatings were formed on aluminium alloy in an electroless glycine bath with various deposition conditions. The bath constituents such as nickel sulphate, glycine, sodium hypophosphite and bath parameters such as pH, temperature, surface area/volume ratio and plating time were optimized by changing the above to get better quality of nickel deposits on aluminium. In this process, nickel sulphate was used as metal ion source, glycine as a complexing agent and sodium hypophosphite was used as a reducing agent. The thickness and rate of deposition were measured from the weight of the Ni-P deposits. The corrosion resistant properties of the coatings were studied by Tafel polarization and electrochemical impedance spectroscopy (EIS). The electrochemical analysis in 3wt. %NaCl solution provided that, the Ni-P coating exhibited better corrosion resistance than the bare aluminium alloy substrate.Keywords
Electroless Deposition, Ni-P, Tafel Polarization, EIS, Aluminium.- Corrosion Inhibition of Aluminium by Molybdate Conversion Coating
Abstract Views :189 |
PDF Views:0
Authors
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
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