CYCLIC OXIDATION AND HOT CORROSION BEHAVIOR OF Pd-Ni-A1 COATINGS
Pd—Ni—Al涂层的循环氧化和在Na2SO4熔盐中的热腐蚀行为

The behavior of cyclic oxidation at 1323K and hgh temperature hot cormsion in NaZS4 melt at 1173K of Pd-Ni-A1 coatings was studied, The coating was prepared by lm-temperature-high-activitypack aluminizing technolcgy on nickel-based superalloy M.8 with a thin layer of pre-electroplated Pd-Ni alloy. The Pd-Ni-Al coating showed excellent perfmce in cyclic oxidation as well as in NaZS4 hot cormion tests. Palladium not only stabilizes the protective P-phase, but also btically increases the hot co~l~sion resistance of coatings.