测量和比较Zr-4合金样品分别在400℃,10.3 MPa过热水蒸汽,0.01 mol/L和0.04 mol/L的LiOH水溶液中腐蚀后氧化膜/金属界面处氧化膜内的压应力,发现在0.04 mol/L LiOH水溶液中腐蚀样品的压应力始终低于在0.01mol/LLiOH水溶液中腐蚀的样品,也始终低于在400℃水蒸汽中腐蚀的样品;0.01 mol/L LiOH水溶液中腐蚀的样品,其界面处的压应力在氧化膜达到一定厚度后也低于在400℃水蒸汽中腐蚀的样品.这表明一定浓度的LiOH水溶液在氧化膜生成过程中会降低氧化膜中的压应力,LiOH水溶液浓度越高,这种作用越明显.
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