Antropov I. Increasing of Corrosion Stability at Laser Processing

The purpose is the process of corrosion of metal surface after treatment with concentrated energy sources. The object is increasing of the corrosion resistance of the surface of unalloyed and low-alloy steels by improving the methods of laser surface treatment. Methods of research - computational and analytical, theoretical and experimental, in particular, quantum mechanics and thermodynamic analysis, electronic and optical microscopy, gravimetric methods. Theoretical and practical results: it was constructed a theory of the interaction between laser beam and the surface of metals and it was justified the using of the linear inhomogeneous heat equation, it was found that the laser treatment significantly affects on the distribution of the surface energy; it's experimentally confirmed that the area on the border of the raw material and structurally modified sites as well as thermal overlapping areas have reduced corrosion resistance; it was developed the method of calculating of laser machining process parameters. The novelty of the results: it was found the dependence of the metal surface corrosion activity on the mode of laser treatment; the first time there were researched changes in the thermodynamic state of the metal surface layer after local heat treatment; the first time there were investigated regularities of a material modified surface layer formation with a higher activation energy. The degree of implementation: The developed method implemented in the production process, the results are used in the educational process, methods and equipment are used in carrying out the research work of students. The area of use is engineering.