【摘要】 利用XRD,TGA,SEM/EDS等方法,研究了(Ni,Pd)Al涂层在纯Na2SO4以及Na2SO4+25％NaCl两种熔盐环境中的高温抗热腐蚀行为.结果表明,与NiAl涂层相比,(Ni,Pd)Al涂层900℃下具有较好的抗高温热腐蚀性能.添加改性元素Pd,阻碍了S进一步向涂层内层扩散,提高了铝化物涂层的抗高温腐蚀性能.更多还原

【Abstract】 The high temperature hot corrosion behavior of the (Ni, Pd)Al coating coated with Na2SO4 or Na2SO4+25%NaCl at 900 ℃ was investigated by TGA, XRD, SEM/EDS. Results show that (Ni, Pd)Al coating has higher oxidation resistance than the NiAl coating. The modified element Pd incorporating into the aluminide coating hinders the diffusion of S into the inner part of the coating matrix, and increases the hot corrosion resistance of the aluminide coating.更多还原