迄今超合金的γ′相分析都是在含氧阴离子电解液中在过钝化区完成的.γ′相分析的基础是γ′相与γ基体两相间过钝化行为的差异,而这种差异是两相间铬含量的不同造成的.因此,无铬超合金中的γ′相在传统电解液中非常难于提取.本文提出一种新方法——在10%NH_4Cl+2%柠檬酸水溶液中在活化电位区的恒电流电解法可以用作这种无铬合金γ′相的定量提取. Up to now, the γ ’phase analysis of superalloys has been completed in over-passivation region in oxygen-containing anolyte. The basis of γ’ phase analysis is the difference of passivation between two phases of γ ’phase and γ matrix. The difference is caused by the difference of chromium content between the two phases, so the γ ’phase in the chromium-free superalloy is very difficult to extract in traditional electrolytes.In this paper, a new method is proposed - in 10% NH 4 Cl + 2% citric acid aqueous solution Constant current electrolysis in the activation potential region can be used for the quantitative extraction of this chromium-free alloy gamma prime phase.