研究常温腐蚀对镍基高温合金表面Al-Si防护涂层循环氧化行为的影响 .结果表明涂层在常温腐蚀后 ,涂层表面粗糙化 ,表层Al含量明显下降 .在循环氧化过程中不仅涂层内出现γ′ Ni3 Al相的时间明显提前 ,而且涂层表面Al2 O3 膜更易剥落 ,从而降低了涂层的抗循环氧化能力 ,缩短了涂层的寿命 The effect of room temperature corrosion on the cyclic oxidation behavior of Al-Si protective coating on nickel-base superalloy was studied. The results show that the surface of coating is roughened and the Al content of the surface is obviously decreased after the coating is corroded at room temperature.During the cyclic oxidation process, The time of γ ’Ni3 Al phase appears obviously ahead of time, and the Al2 O3 film on the coating surface is more easily peeled off, thereby reducing the anti-cyclic oxidation ability of the coating and shortening the life of the coating