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利用自行设计的动态模拟旋转装置 ,用失重法和电化学测试法通过改变转速、温度等条件研究了工业纯钛和 0 0Cr2 5Ni2 2Mo2不锈钢在 1mol/LH2 SO4溶液中的冲刷腐蚀。结果表明 :随着转速的增加和温度的升高 ,工业纯钛和 0 0Cr2 5Ni2 2Mo2不锈钢的冲刷腐蚀速度增大 ,高温(83℃、92℃ )转速高于 4 .1 8m/s时腐蚀增加更明显 ;在本实验体系下 ,电化学因素对冲刷腐蚀的协同效应起相当大的作用 ;工业纯钛和 0 0Cr2 5Ni2 2Mo2不锈钢在 1mol/LH2 SO4溶液中的阻抗图谱为单一容抗半圆弧 ,增大转速降低了极化电阻的数值 ,但不改变阻抗图谱的形状 ,说明冲刷作用加速了材料的腐蚀 ,但并未改变金属的腐蚀历程和溶解机制。
The corrosion corrosion of industrial pure titanium and 0 0Cr2 5Ni2 2Mo2 stainless steel in 1 mol / LH2 SO4 solution was studied by using weight loss method and electrochemical test by changing the conditions of rotation speed and temperature by using the self-designed dynamic simulation rotary device. The results show that the corrosion rate of industrial pure titanium and 0 0Cr2 5Ni2 2Mo2 stainless steel increases with the increase of rotational speed and temperature, and the corrosion rate increases when the rotational speed of high temperature (83 ℃, 92 ℃) is higher than 4.18m / s More obvious; under this experimental system, the electrochemical factors play a significant role in the synergistic effect of erosion and corrosion; the impedance spectra of industrial pure titanium and 0 0Cr2 5Ni2 2Mo2 stainless steel in 1mol / LH2 SO4 solution are single capacitive semi-circular arc . Increasing the rotating speed reduces the value of the polarization resistance but does not change the shape of the impedance spectrum, indicating that the erosion accelerates the corrosion of the material, but does not change the corrosion history and the dissolution mechanism of the metal.