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电化学保护方法分阳极保护和阴极保护两种。阳极保护于1967年应用于北京化工实验厂碳铵系统的碳化塔,效果良好。由于液位波动,气液界面常处于活化状态,遭受电解腐蚀,有待进一步完善。阴极保护又分牺牲阳极和外加电流两种。用整流器控制的外加电流的阴极保护,于1973年在北京化工实验厂加压碳化付塔上首次得到应用,保护效果很好。但由于液位波动和去极化等影响,保护电位不易控制。后来人们改用恒电位控制。由于控制参比电极电位波动,阴极保护电位难以控制,辅助阳极易活化,保护效果受到影响。因
Electrochemical protection method points anode protection and cathode protection two. The anode protection applied to the carbonation tower of the ammonium bicarbonate system of Beijing Chemical Experiment Factory in 1967 and has good effect. Due to the fluctuation of liquid level, the gas-liquid interface is often in an activated state and subjected to electrolytic corrosion, which needs to be further improved. Cathode protection is divided into sacrificial anode and applied current two. Cathode protection with applied current controlled by the rectifier was applied for the first time in 1973 at the Beijing Chemical Experimental Plant for pressure carbonation. The protection effect is very good. However, due to fluctuations in the liquid level and depolarization, the protection potential is not easy to control. Later, people switched to potentiostatic control. As the control reference electrode potential fluctuations, the cathodic protection potential is difficult to control, easy to activate the auxiliary anode, the protective effect is affected. because