Abstract:

Adopting static corrosion weight-loss method, the corrosible effect Shengli oilfield produced water containing main ion ingredients (Cl^- , Ca^{2 +} , HCO ^{- 3}) on the carbon steel and penetrating zinc steel metal materials was studied, and causes of corrosion were also made analysis. The results show that with the concentration of Cl- increasing, the corrosion rate of 20^# carbon steel and the penetrating zinc carbon steel is increased. When the content of Ca^{2 +} ions was added, the corrosion rate of 20^#carbon steel and the permeability zinc carbon steel also has a increasing trend. HCO ^{- 3} inhibited corrosion rate of 20^#carbon steel and then increased; the corrosion resistance of penetrating zinc steel is superior to 20^#carbon steel in the simulative oilfield water, the corrosion rate is less than the petroleum industry standard 0.076 mm/a, so penetrating zinc steel metal materials can be used in pipeline of the oilfield.

Key words:

Oilfield water,    ,  Penetrating zinc steel,    ,  Ionic Corrosion,    ,  Corrosion ratemso-ascii-font-family: Calibri, mso-ascii-theme-font: minor-latin, mso-fareast-font-family: 宋体, mso-fareast-theme-font: minor-fareast, mso-hansi-font-family: Calibri, mso-hansi-theme-font: minor-latin">

摘要： 采用静态腐蚀挂片失重方法, 研究了胜利油田采出水中主要腐蚀离子成份(Cl^- , Ca^{2 +} , HCO ^{- 3} )对 20^#碳钢和渗锌碳钢的腐蚀行为, 并对腐蚀原因做出了分析。研究表明, 20^#碳钢及渗锌碳钢的腐蚀速率随腐蚀介质中Cl-质量浓度的增加而呈现上升趋势;Ca^{2 +}离子的加入在一定程度促进了20 ^#碳钢和渗锌钢的腐蚀;HCO^{- 3} 对 20^#碳钢腐蚀具有先抑制后促进作用。在模拟的采出水腐蚀介质中, 渗锌碳钢的耐蚀性能要明显好于20 ^#碳钢, 平均腐蚀速率小于石油行业腐蚀速率(0 .076 mm/a)控制标准规定。

关键词: 油田采出水 , 渗锌碳钢 , 离子腐蚀 , 腐蚀速率