Journal of Surface Science and Technology

S. Karthikeyan ¹, S. Karuppuchamy ¹, A. P. Sakthivel ¹, T. Vasudevan ¹, K. N. Srinivasan ¹, S. John ²

Affiliations
1 Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, Tamil Nadu, IN
2 Central Electrochemical Research Institute, Karaikudi 630 006, Tamil Nadu, IN

Abstract

Detailed dicussion of electroless nickel processes in terms of electrolyte compositions and electroless deposition conditions are reviewed. Electroless deposition of Ni-P, Ni-B, Ni-P-B and their composites with solid particles (SiC, Al₂O₃, Boron, Diamond and PTFE) are considered. Properties of the composites such as micro hardness, wear resistance, friction and corrosion resistance are discussed in terms of coating composition and structure based on literature information.

Keywords

Electroless, Composites, Microhardness, Corrosion Resistance.

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S. Karthikeyan ¹, Xianguo Hu ², P. A. Jeeva ³, S. Harikumar ¹, S. Narayanan ³

Affiliations
1 Centre for Nanobiotechnology, VIT University, Vellore-632 014, IN
2 Institute of Tribology, Hefei University of Technology, Hefei, Anhui-230 009, CN
3 School of Mechanical & Building Sciences, VIT University, Vellore-632 014, IN

Abstract

The inhibitive action of Tolyl-3,3 dimethyl thiourea (TDMTU) on corrosion of mild steel in brine water (5% NaCl) has been studied using weight loss, gasometric measurements, potentiodynamic polarization and impedance studies. The studies clearly indicated that TDMTU acted as cathodic inhibitor. The adsorption of the compound on mild steel surface obeyed Temkin's adsorption isotherm. Diffused reflectance spectra and SEM images confirmed the formation of adsorbed film of inhibitor on metal.

Keywords

Corrosion Inhibitor, Thio Compounds, Impedance Measurements, Adsorption.

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