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本文详细讨论了可用来预测应力腐蚀开裂发生的诸方法。联系控制裂纹发生和扩展的动力学因子研究了电流衰减测量法和动电位法。评论了根据合金的结构进行预测的方法,认为该方法只适用于那些原先就存在活化通道、而不适用于由应变产生通道的场合。讨论了裂纹中局部性(溶液)变化和电位分布。在许多情况下,很少考虑裂纹中的电位降大小。因为铁的某些氧化物呈现非常低的还原电流效率,所以试样的表面性质可能是非常重要的。需通过采用动力学和热力学数据存细确定开裂条件,就象对在磷酸溶液中的 C-Mn 钢所做过的那样。
This article discusses in detail methods that can be used to predict the occurrence of stress corrosion cracking. In connection with the kinetic factors that control the occurrence and propagation of cracks, the current decay method and the potentiodynamic method were studied. Commenting on the method of predicting the structure of an alloy, it is considered that the method is only applicable to those where an activated channel was originally present, but not to a channel produced by a strain. Discusses the local (solution) changes in crack and potential distribution. In many cases, little consideration is given to the small potential drop in the crack. Because some oxides of iron exhibit very low reduction current efficiency, the surface properties of the sample can be very important. Cracking conditions need to be determined by using kinetic and thermodynamic data as well as C-Mn steels in phosphoric acid solutions.