关于NiCr40Al3合金,国内外都进行过详尽的研究.其中γ′相的萃取方法本来以为是早已解决了的,因为镍基合金γ′相的电解萃取已探讨了三十多年,各国学者都有大量的工作,而且结论是一致的:在硫酸铵和柠檬酸的水溶液中,在室温下恒电流电解,镍基合金γ′相是可以定量萃取的.这种方法还被采用作ASTM的标准方法.最近日本学者提出了一种采用非水溶剂电解液的恒电位电解萃取法,并认为比上述方法更为优越.但是,这些工作都没有涉及含铬量这 About NiCr40Al3 alloy, both at home and abroad have been exhaustive study, which γ ’phase extraction method was originally thought to have been solved, because the nickel-based alloy γ’ phase electrolytic extraction has been discussed for more than 30 years, scholars from all countries have A large number of work, and the conclusion is consistent: in the ammonium sulfate and citric acid aqueous solution, galvanostatic galvanostatic electrolysis at room temperature, nickel-based alloy γ ’phase can be quantitatively extracted.This method has also been used as a standard ASTM method Recently, Japanese scholars proposed a potentiostatic electrolytic extraction method using a nonaqueous solvent electrolyte, which is considered to be superior to the above methods. However, none of these work involves the chromium content