Journal of Applied Electrochemistry

, Volume 41, Issue 1, pp 19–27 | Cite as

Corrosion performance of the electroless Ni–P coatings prepared in different conditions and optimized by the Taguchi method

Original Paper

Abstract

This paper presents an experimental study on the influence of anionic surfactant sodium dodecyl sulfate (SDS), pH, substrate finishing and annealing temperature on the corrosion resistance of electroless nickel phosphorus (Ni–P) coatings using electrochemical techniques and optimization of process parameters based on the Taguchi method. Parameters were selected in three levels and L9 from orthogonal robust array design was used. Corrosion performance of the electroless Ni–P coatings was evaluated by polarization and electrochemical impedance spectroscopy (EIS). Scanning electron microscope (SEM), Energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis were used for studying surface morphology and chemical composition of the electroless Ni–P coatings. The results showed that SDS surfactant causes increasing of corrosion resistance and improves surface morphology. Finally, optimum conditions were achieved as, surfactant concentration: 1.5 g L−1, pH: 5.5, substrate finishing provided with emery paper no, 2000, and annealing temperature of 200 °C.

Keywords

Electroless Ni–P coating Surfactant Taguchi method EIS 

Notes

Acknowledgments

Funding support for this work was provided by Vice Chancellor Research of International Center for Science, High Technology and Environmental Sciences according to the research project number 618801 in the period of 2009/2010 and is highly acknowledged. The authors would like to acknowledge Mr. Javad Vazifeh Mehrabani for his help in analysis of results.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Department of Materials Science and Engineering, Faculty of EngineeringShahid Bahonar University of KermanKermanIran
  2. 2.Department of MaterialsInternational Center for Science, High Technology and Environmental SciencesKermanIran

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