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利用扫描隧道显微镜（ＳＴＭ）对 ＱＡｌ－９－２合金在３．５％ ＮａＣｌ溶液中脱合金腐蚀的早期过程进行了原位观察结合ＳＥＭ，ＥＤＸ分析表明，ＱＡｌ－９－２合金的脱合金腐蚀首先发生在α基体和亚稳β相的界面，并在亚稳β相内继续扩展．α相不发生脱合金腐蚀．ＳＴＭ原位观察没有发现钢在表面再沉积的现象．
In situ scanning electron microscopy (SEM) and scanning electron microscopy (EDX) analysis of the early process of the Au-9-2 alloy decoupling gold corrosion in the solution of QAl-9-2 show that the decarburization corrosion of the QAl-9-2 alloy It first occurs at the interface between the α matrix and the metastable β phase and continues to expand in the metastable β phase. Alpha phase does not occur off gold corrosion. The in situ observation of the STM found no evidence of redeposition of steel on the surface.