Uticaj faktora procesa obrade na tehnološke karakteristike prevlaka kod proizvoda namenske industrije
Jovanović, Desimir N.
Faculty:University of Niš, Faculty of Mechanical Engineering
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The research topic of this dissertation is on the impact of processing technology on the characteristics of protective galvaniccoatings. Testing was performed with a coating of zinc and chromium, as well as coatings that are most commonly used to protect metal elements. In both examined coatings varied characteristics of the substrate (roughnessand hardness) for its application depending on the manner of production or applied technology, finishing and electrolysis parameters, current density and deposition time. In addition to the traditional methods for the characterization of coatings, the defined standards in the paper studied and methods that are less common in tests of metal coatings such as "scratch" test for the determination of adhesion and testing tribological characteristics of coatings deposited. The external appearance of the coatings was evaluated visually, and morphology by optical microscopy and AFM microscopy application. The thickness of the coatings was
determined by magnetic method. The adhesion of coatings to the base material is determined by standardized methods, method of heating and "scratch" test. Microhardness testing was performed by the method Vickers HV0.1. Wear tests were performed under conditions with "block-on-disk" contact geometry and the resulting wear traces were quantified using optical measuring microscope. Comprehensive analysis of results showed the influence of the surface condition of the individual characteristics of electrolytic coating of zinc and chromium. Implemented comprehensive researches have created a basis for the development of expert systems in the field of galvanic coatings. In the paper are given the starting point of knowledge about expert systems and neural networks for creation a database and development of modules for predicting the characteristics of the coatings on the basis of the deposition parameters.View More
Keywords:Faktor procesa, galvanske prevlake cinka, galvanske prevlake hroma, karakterizacija prevlaka; Factor process, galvanic zinc coatings, galvanic chromium coatings, characterization of coatings