方波脉冲电流阴极保护模拟研究  

Simulated Study on the Cathode Protection by Square Wave Pulsed Currents

作　　者：邱于兵[1] 王昊[1] 郭稚弧[1] 林汉同[1] 

机构地区：[1]华中科技大学,湖北省武汉市430074

出　　处：《中国海上油气（工程）》2002年第2期20-24,共5页China Offshore Oil and Gas

摘　　要：在3.5m×2.0m×3.0m的水池中建立一个阴极保护系统,研究在恒幅值方波脉冲电流作用下,阴极表面的电位响应波形特征及电位分布特点。结果表明:在恒幅值方波脉冲电流作用下,阴极表面的电位响应为典型的方波电流作用下的电位响应,只有补偿溶液电阻才能得到真实的电位相应波形,但实际测量中可以直接采用电位响应波形的最下沿电位值作为测量点的极化电位;方波脉冲电流的幅值、频率和占空比的增加,均可使阴极表面的电位分布曲线负移,但各参数的影响规律不同;方波脉冲电流在阴极表面具有更均匀的分布,更深的穿透性,可明显延长保护深度。关于方波脉冲电流在系统中的分布机理还不清楚,有待进一步研究。In a 3.5×2.0×3.Om pool, a simulated cathode protection (CP) system used square wave pulsed currents (SWPCs) was set up; in which the characteristics of the potential response waveforms and potential distributions on the cathode were studied. The results show that the potential responses on the cathode are typical potential responses under SWPCs, and the solution resistance (Rl) must be compensated to obtain the true potential response waveforms on the cathode. However, in practical measurements the down most potential of the potential waveform can be used as the polarization potential of the test point. With increasing every parameters of the amplitude, duty cycle and frequency of SWPCs, the potential distributions on the cathode will become more negative, but the effect of the every parameter is different. Under SWPCs the potential distributions on the cathode are much more uniform than that under the direct current (EC), and effectively protected depths increase obviously. The mechanism of the CP by SWPCs is still needed further study.

关 键 词：方波 脉冲电流 阴极保护 模拟 研究 防腐 

分 类 号：TG174.41[金属学及工艺—金属表面处理]