THE PROPERTIES OF ELECTROLYTICALLY DEPOSITED COMPOSITE ZN-PTFE COATINGS

Abstract

The requirements for the properties of the surface of highly stressed components are getting increasingly higher so the pure metal coatings are not sufficient any more. The research and development makes it possible to use new alloy or composite coatings which extend the possibilities of surface treatment applications. This study looks at the composite, electrolytically deposited Zn-PTFE coatings (polytetrafluoroethylene) focusing on the manufacturing technology and composition analysis. An optimised technological process results in obtaining a coating of the required properties, i.e. a coating with uniformly distributed content of PTFE particles. It describes the relations between the technological parameters of metal plating and the contents of PTFE in the coating. The analysis of the Zn-PTFE coating composition, i.e. the presence of PTFE has been proved using the method of infrared micro-spectroscopy in the Molecular Spectroscopy Laboratory in the Institute of Chemical Technology (ICT) in Prague. The metallographic tests for the assessment of coating structures were carried out at the Institute of Manufacturing Technology of the Faculty of Mechanical Engineering at Czech Technical University in Prague. The research into the electrochemical composite coatings contributes to the possibilities of producing composite coatings with a wide range of applications.

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