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Oxidation resistance of surface-modified coatings for energy boilers

Szczucka-Lasota B., Szymański K.

Archives of Materials Science and Engineering

2012

Vol. 56, nr 2

75--81

Purpose: definite the oxidation resistance of the new obtained multicomponent coatings of a zonal structure and properties enabling its long-term work at an elevated temperature and in an environment of aggressive products of fuels combustion. Design/methodology/approach: The selected results of high temperature corrosion resistance of HVOF sprayed coatings with binder composition are presented. The temperature of cyclic oxidation test was 887 K and the exposure time was 500 h. The macro and microstructure of coatings after and before corrosion test were analyzed by optics and scanning microscopy. The structure of binder composition and filling component, like chooses oxides are presented. The structure and chemical composition of coatings are investigated by SEM and EDX energy dispersive analysis method. Findings: The corrosion resistance of new elaborated coating with binder is presented. The multicomponent new elaborated coating can be applied in elevated temperature and aggressive environments for protection of water walls boilers or waste combustors. Research limitations/implications: If research is reported in the paper this section must be completed and should include suggestions for future research and any identified limitations in the research process. Practical implications: The new elaborated and presented coatings use to basic protection to wear and corrosion condition or modified surface of multilayer coatings in the energy boiler. The results of example application of presented sealing in 2012 year are shown. Originality/value: The elaboration of new corrosion resistance coatings with the modification of surface for the application in high temperature and corrosion enviroments and the presentation a degradation of new elaborated coating during the corrosion test.