Document Type : Original Article
Authors
1
Teaching assistant in Chemistry department, Faculty of Girls for Arts, Science and Education, Ain shams University, Cairo, Egypt
2
Professor assistant in Chemistry department, Faculty of Girls for Arts, Science and Education, Ain shams University, Cairo, Egypt
3
Professor assistant in Chemistry department, Faculty of Girls for Arts, Science and Education, Ain shams University, Cairo, Egypt
4
Lecturer in Chemistry department, Faculty of Girls for Arts, Science and Education, Ain ‎shams University, Cairo, Egypt
5
Lecturer in Chemistry department, Faculty of Girls for Arts, Science and Education, Ain Shams University, Cairo, Egypt
Abstract
The protection of metals against corrosion is one of the most crucial roles played by deposited coatings. In our research, electroless coating of Al alloy 1060 by Ni-Sn-P deposit and Ni-Sn-Polymer composite. Firstly, we coat Al alloy 1060 with a Ni-P layer as a reference to our work. Then coat Al alloy 1060 with Ni-Sn-P coating by using different concentrations of tin chloride. The best alloy of Ni-Sn-P is then used to produce the quaternary Ni-Sn-polymer composite. Also, we use different concentrations of polyvinyl pyrrolidone (M.Wt. 40,000). By using a scanning electron microscope (SEM), their surface morphology and microstructure were examined. The composition of the coat was analyzed using thin film and EDAX analysis. The corrosion resistance was studied by potentiodynamic polarization in 3.5g/l sodium chloride solution. Corrosion protection is increased for the ternary alloy as tin increases, and the corrosion protection of the quaternary alloy increases as polymer content increases in the coated bath. The corrosion resistance sequence of the different used coats is Ni-Sn-polymer > Ni-Sn-P > Ni-P.
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