海外油田钢制储罐用牺牲阳极保护技术

Galvanic anode protection techniques for steel tanks used in the overseas oilfields

通过电化学测试、阳极溶解形貌观察和SEM检测,确定了铝合金牺牲阳极在海外高矿化度、高氯离子含量的油田污水中的最佳配方(质量分数)为Al-4.5%Zn-0.025%In-1.5%Mg-0.05%Ti-0.015%Ga,并通过极差分析确定了各合金元素对电流效率的影响程度,分析了各合金元素对电流效率的作用机制;模拟试验和现场试验结果表明,选定最佳成分的牺牲阳极在高矿化度、高氯离子含量条件下对油田钢制储罐保护效果良好。

Through electrochemical test and morphology analysis of the dissolved anode,the component content of the galvanic anode had been optimized. Al-4. 5% Zn-0. 025% In-1. 5% Mg-0. 05% Ti-0. 015% Ga was the best component content in the oversea oilfield water with high concentration of salinity and chloride. The influence and mechanism of the alloy elements,which affected the current efficiency of galvanic anode,had been analyzed. Simulation and field experiment both indicated that optimal galvanic anode worked well in the oilfield water with high concentration of salinity and chloride.