Type I and II hot corrosion attack has been observed on certain marine gas turbine engines in different areas of the hot section turbine hardware. In order to improve the service life and resistance to hot corrosion of these turbine blades, laboratory testing of the current baseline coating and several candidate replacement coatings was initiated using a low-velocity, atmospheric-pressure burner-rig (LVBR). This paper examines the LVBR results of these high temperature coatings of various chemical composition and applied by several processes on one alloy substrate to determine the hot corrosion resistance relative to the baseline coating. The goal of the research is to replace the current baseline coating with a better quality, more resistant, and better performing coating system to implement on hot section blades of marine gas turbine engines used in the U.S. Navy.

Subject
Hot corrosion, Coating performance, Coatings, Gas turbines, Substrates, Bunsen burners, Spray coating, Corrosion losses, Engines, Penetration, Maritime, Corrosion resistance, Alloys
Keywords:
Type I hot corrosion, Type II hot corrosion, marine gas turbines, high temperature coatings, Alloy M247, average coating loss, interdiffusion
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2005
GOV
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