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| INFLUENCES OF TEMPERATURE ON CORROSION BEHAVIOR OF P110 STEEL |
| ZHU Shidong1;2; YIN Zhifu1; BAI Zhenquan2; WEI Jianfeng1;ZHOU Genshu1; TIAN Wei2 |
1. School of Materials Science and Engineering; Xi'an Jiaotong University; Xi'an 710049
2. Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods; CNPC; Xi'an 710065 |
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Abstract Influences of temperature on CO2 corrosion behavior of P110 steel were investigated in stimulated oil and gas field environments. The corrosion scales were analyzed by using SEM，EDS and XRD. Simultaneously, the corrosion rate was measured by the weight loss method. The results showed that the corrosion rate of P110 steel increased first and decreased subsequently with the increase of temperature at static state, and the maximal corrosion rate was presented at 100 ℃. Corrosion rate increased first and deceased subsequently with increasing temperature at 5 m/s too, the maximal corrosion rate was presented at 60 ℃ and the corrosion rate under dynamic and static state were equivalent approximately at 160 ℃. The effect about flow rate operated on corrosion rate was not obvious when temperature was more than 140 ℃, and there were lesser change of the corrosion rate with further increasing temperature. After analyzing, a conclusion can be drawn that temperature affected corrosion rates in that it changed the surface morphologies, constructions, compositions, corrosion scale factor, scale density of the material and so on.
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Received: 11 April 2008
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Corresponding Authors:
YIN Zhifu
E-mail: Yinzhifu919@sohu.com
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