Open AccessOxidation resistance by HVOF coating of MDN-121 on turbine material
Author(s) -
D Prabhakaran,
N Jegadeeswaran
Publication year - 2022
Publication title -
journal of mines, metals and fuels
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.125
H-Index - 11
ISSN - 0022-2755
DOI - 10.18311/jmmf/2021/30114
Subject(s) - nichrome , thermogravimetric analysis , gravimetric analysis , coating , materials science , metallurgy , corrosion , thermal spraying , cermet , turbine , composite material , chemical engineering , chemistry , engineering , mechanical engineering , ceramic , organic chemistry
Surface corrosion, such as oxidation, occurs in gas turbines at high-temperature locations such as turbine edges. Because of the absconds, the turbines became less compelling and loud. The focus of the exhibit is on a high speed oxy-fuel coating of MDN-121 unusual steel using a blended mix of cermets powder consisting of 25% Cr 3 C 3 NiCr+75% NiCrAlY. In a hot environment at 750oC, oxidation tests were performed on coated and uncoated MDN-121. Cycles of 1 hour warming and 20 minutes cooling were used in thermogravimetric testing. Weight estimation was done after each cycle. The tests were characterized using XRD and SEM/EDS after 50 cycles were completed. It was observed that the coated test is more oxidation safer than the uncoated test. Surface morphology from SEM/EDS shows that the surface is wealthy in oxides. Gravimetric examination demonstrated that the weight picks up of the test takes after a illustrative relationship with time. The rate steady for the coated test was much for the coated sample was much lesser compared to the uncoated sample.