【摘要】 油田设施受产出水和CO2/H2S腐蚀严重。以长庆某天然气井产出水为腐蚀介质,采用失重法研究了不同腐蚀影响因素对N80钢的作用规律。结果表明,随着介质温度的升高,腐蚀速率先增加后降低,并在60℃时达到最大;Cl-的影响与温度具有基本相似的规律,在Cl-含量为30g/L时腐蚀速率最大;随着pH值的增大,腐蚀速率持续减小,并在pH值为8.0左右时达到最低;随着CO2分压的增大,腐蚀速率呈单调增大趋势;随着H2S分压的增大,腐蚀速率先下降后又缓慢升高。更多还原

【Abstract】 Weight loss method was used to investigate the effects of various factors on the corrosion behavior of tubular steel N80 in produced water of a natural gas well in Changqing area. Results show that under the experimental conditions,the corrosion rate first increased and then decreased with the increase of temperature, and the maximum corrosion rate was recorded at 60 ℃. The effect of Cl-was similar to that of temperature, and the maximum corrosion rate was recorded at a Cl-concentration of 30 g/L. Besides, the corrosion rate constantly decreased with increasing pH value and reached a minimum value at a pH value of 8.0. Moreover, the corrosion rate of the tubular steel monotonously increased with increasing partial pressure of CO2,but it initially decreased and then slowly increased with increasing partial pressure of H2S.更多还原