Comparison of the coating properties and corrosion rates in electroless Ni-P/PTFE composites prepared by different types of surfactants |
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Authors: | Iman R MafiChangiz Dehghanian |
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Institution: | University of Tehran, College of Engineering, School of Metallurgy and Materials Science, Tehran, Iran |
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Abstract: | The effects of the addition of three types of surfactants (cationic, anionic, non-ionic) at different concentrations in the plating bath on the deposition rate, PTFE content and surface morphology of electroless Ni-P/PTFE composite coatings were investigated. It was demonstrated that the cationic and non-ionic surfactants created a uniform distribution of PTFE particles in the coatings. The effects of the surfactant type and concentration on the corrosion properties of Ni-P/PTFE coatings were also studied. The corrosion resistance was increased by the incorporation of PTFE particles into the Ni-P matrix. The level of improvement depended largely on the type and concentration of the applied surfactants. |
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Keywords: | Electroless deposition Composite coating PTFE Corrosion resistance Polarization Impedance |
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