前言许多研究者采用恒电位方法研究孔蚀的成长动力学规律,但由于蚀孔的形状和数量随时间和实验条件的改变而改变,故很难获得反映成长速度大小的孔内电流密度。因此,研究小孔腐蚀的成长动力学,采用人造单蚀孔电极较为合适。单蚀孔电极是将一直径较小的金属丝埋在高聚物中经固化并打磨出一个端面而成。当研究恒定电位高于某一临界电位下阳极电流随时间的变化时,可 Many researchers use the potentiostatic method to study the growth kinetics of pitting corrosion. However, it is difficult to obtain the current density in the holes that reflects the growth rate because the shape and number of pits change with time and experimental conditions. Therefore, it is more appropriate to study the growth kinetics of small hole corrosion and to use artificial single hole electrode. Single-hole electrode is a smaller diameter metal buried in the polymer by curing and polished out of an end made. When the constant potential is higher than a certain critical potential under the anode current changes with time