海洋工程结构物快速连接新型牺牲阳极的研究

Fast connection of new-type sacrificial anode on offshore engineering structures

针对海洋工程结构物阴极保护牺牲阳极进行式样优化,将截面为“T”型的新型牺牲阳极与常规梯形牺牲阳极进行对比研究。通过实际海洋测试表明:新型牺牲阳极在初期能够发出更大的保护电流,加速结构物表面钙镁沉积层的形成,降低中后期保护电流密度的需求,整体上可节约牺牲阳极用量。另外,结合新型牺牲阳极研制了一种能够在水下快速安装的连接卡箍装置,适用于海洋工程结构物局部阴极保护缺陷的快速修复。

In this paper,the type of sacrificial anodes providing cathodic protection for offshore engineering structures is optimized,and the new-type sacrificial anodes with a T-shaped cross-section are compared with the conventional trapezoidal ones.The test in real sea conditions shows that the new-type sacrificial anodes can generate a higher protective current at the initial stage,accelerate the formation of a calcium-magnesium deposition layer on the surface of the structure,reduce the demand for the protective current density in the middle and late stages,and ultimately lower the number of sacrificial anodes used in the whole life cycle.In addition,a connection clamp device for fast subsea installation is developed,and it can be combined with the new-type sacrificial anodes to achieve the quick repair of local cathodic protection defects of offshore engineering structures.