Sea water corrosion behavior of plasma sprayed abradable coatings

National Conference on Processing and Characterization of Materials

Parida, M.^1 ; Nanda, S.P.^2 ; Mishra, S.C.^3

Dept. of Chemistry, SCITM, Similiguda, India^1

Dept. of Chemistry, CUTM, Paralakhemundi, India^2

Metallurgical and Materials Engineering Department, NIT, Rourkela., India^3

关键词: Abradable coating;    Coating thickness;    Compressor casing;    Effect of time;    Plasma sprayed;    Service temperature;    Sharp increase;    Thermal plasma;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/178/1/012018/pdf
DOI  :  10.1088/1757-899X/178/1/012018

来源: IOP

【 摘 要 】

Aluminum based abradable coating is used for sealing purpose in compressor casing of aero engines to withstand up to a service temperature of 450°C. Al-BNSiO2 composite coating is deposited using thermal plasma spray technique. Coating thickness measured and porosity of the coating is evaluated.Coating morphology is observed and EDSanalysis is done with SEM (Jeol make). The effect of time on the sea water corrosion behavior of the coating is evaluated. It is observed that, there is a sharp increase in weight gain of the coating up to six weeks of immersion. This behavior is attributed to the adsorption/deposition of other elements/reactions taking place during interaction with sea water.