Document Type : Research Paper
Authors
1 University of Technology
2 Metallurgical &Production Eng. Dep, University of Technology
3 Chemical Eng. Dept, University of Technology
Abstract
Abstract Carbon steel alloy types ( ST - 52-3RR ) are widely used in constructing marine environments and other engineering structural applications due to their good corrosion resistance , mechanical and physical properties . It suffers from corrosion specially in sea water . In order to improve the alloy properties and to protect it from corrosion , the alloys must be protected in many methods . In this study , surface coating technology used to provide one of the possibilities of control corrosion and to improve material properties . The surface coatings are applied by thermal spray coating method to improve the corrosion resistance of alloys ( ST - 52 -3 RR ) . Thermal spray coating is used due to its high reliability , ease in application and operation , its availability and availability of the material used in coating . Electrochemical techniques including potentionstatic measurements are used together with immersion tests in 3.5 % NaCl to evaluate the performance of the steel ( ST - 52-3RR ) in marine environment . This study indicates the beneficial of the Aluminum powder spray coating sealed by epoxy coating on aluminum coating layer due to the reduction in corrosion rate . This reduction was noticed in weight loss method and low corrosion current density during polarization measurements .
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