Corrosion performance of Cr3C2-NiCr+0.2%Zr coated super alloys under actual medical waste incinerator environment

[摘要] Incineration techniques are widely used to dispose of various types of waste which lead to formation of very corrosive environment. Such corrosive environment leads to the degradation of the alloys used in these areas. To obviate this problem, zirconium modified Cr3C2-(NiCr) coating powder has been deposited on three superalloys namely Superni 718, Superni 600 and Superco 605 using Detonation gun technique. Corrosion test was conducted in actual medical waste incinerator environment. The samples were hung inside the secondary chamber operated at 1050°C for 1000h under cyclic condition. Corrosion kinetics was monitored using the weight gain measurements and thickness loss. Corrosion products were characterized using scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction technique. It was observed that coating is found to be successful in impeding the corrosion problem in superalloys.

[发布机构] Department of Mechanical Engineering, SLIET, Longwol, Sangrur; 148106, India^1;Department of Mechanical Engineering, Thapar University, Patiala; 147004, India^2;Department of of Metallurgical and Materials Engineering, IIT Roorkee, 247667, India^3

[效力级别] 机械制造

[关键词] Corrosion kinetics;Corrosion performance;Corrosion problems;Corrosion products;Corrosive environment;Cyclic conditions;Weight gain measurements;X-ray diffraction techniques