利用自行研制的双速流动试验装置，用模拟电池的方法，研究了在模拟轮南油田回注污水中，油管套用钢ＡＰＩ－Ｐ１０５沉积物下局部腐蚀行为，结果发现其腐蚀速度随阴阳极面积比Ａｃ／Ａａ的增加先增大后减小，而后又重新增大，沉积物下腐蚀还受其他因素影响，如：流速，ＣＯ２分压等，这些因素的影响规律与面积比Ａｃ／Ａａ有关。
By using the dynamic loop test system with dual speeds, which was designed and constructed by authors themselves , the cormion rate beneath deposit on API-PI05 in Cq-containing ,simulating injection water of Iunnan 011 Field was measured with a simulating cell. The results shaved that the comion rate increased with increasing the ratio of the surface areas of cathode to that of ande(A,/A,). But when A,/A, increased to certain value, the comion rate decreased first, then increased with increasing A,/A,. In this paper, the non-mnotonic relationship between the comion rate and the A,/A, value is discussed and clarified. The comion rate was also be affected by such factors as flowing rate, partial pressure of aetc. When A,/A, was snall, there was little effect on it. But after A,/A, increased to certain value, the effect muld be larger.
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