THE CORROSION LAW AND INFLUENTIAL FACTORS BENEATH DEPOSIT ON API-PI05 STEEL
沉积物下API—P105钢腐蚀规律及影响因素

By using the dynamic loop test system with dual speeds, which was designed and constructed by authors themselves , the corrosion rate beneath deposit on API\|P105 in CO 2\|containing ,simulating injection water of Lunnan Oil Field was measured with a simulating cell. The results showed that the corrosion rate increased with increasing the ratio of the surface areas of cathode to that of anode(A c/A a). But when A c/A a increased to certain value, the corrosion rate decreased first, then increased with increasing A c/A a. In this paper, the non\|monotonic relationship between the corrosion rate and the A c/A a value is discussed and clarified. The corrosion rate was also be affected by such factors as flowing rate, partial pressure of CO 2 etc. When A c/A a was small, there was little effect on it. But after A c/A a increased to certain value, the effect would be larger.