Optimization of Electroless Ni-P-Nano-TiO₂ Coating Parameters Using Taguchi Method for Corrosion Performance

Abstract:

This article considers an experimental study of Taguchi’s parameters design to maximize the corrosion resistance of electroless Ni-P-nano-TiO₂ on low carbon steel substrate. The experiments were carried out based on Taguchi’s L9 orthogonal array considering four coating parameters of three levels each namely, Bath Temperature, pH of bath, Bath Loading, and concentration of TiO₂. Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDS) facilitated the study of the surface morphology and the chemical composition of the coatings. Corrosion performance of the deposits was evaluated by Tafel polarization technique in 3.5 wt. % of NaCl solution. The observation shows that pH level has more significant influence on the corrosion behavior of the composite deposit. The experimental study revealed that the optimum conditions are A3B3C2D1 (Temperature of 88° C, pH of 6, bath loading of 0.5 dm²/l, and TiO₂ concentration of 2 g/l).

• Periodical: Applied Mechanics and Materials (Volumes 813-814)
• Pages: 95-100
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.813-814.95
• Online since: November 2015
• Authors: T.R. Tamilarasan, R. Sathish Kumar, R. Rajendran, G. Rajagopal
• Keywords: Corrosion Resistance, Electroless Ni-P-nanoTiO₂, Optimization, Taguchi Analysis

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