针对江汉油田泥浆循环系统设备, 设计了牺牲阳极阴极保护防腐蚀方案。对无机盐水的电阻率进行筛选, 选择铝阳极, 并对铝阳极的规格、形状、安装位置、使用寿命、检测技术等进行了设计, 阳极安装采用直接焊接或螺栓固定。该技术已实现现场应用。结果表明, 被保护试片平均腐蚀速率小于0.2 mm/a, 保护率在80%左右, 能够满足防腐蚀要求。

A sacrificial anode cathodic protection technology was desigred for the mud circulation system equipment in Jianghan oilfield. According to the resistance rate of salt water, aluminium anode was chosen as the feasible anode, and its specification, shape, installation position, service life and detecting techniques were investigated. By direct jointing or bolt fixation, field construction can be achieved. The results showed the average corrosion rate of the protected piece was less than 0.2 mm/a and the protection efficiency was about 80%, which can meet the needs of corrosion prevention.