海洋工程用新型牺牲阳极设计与性能研究(Ⅲ)——中尺寸阳极实海试验研究

目的通过构型优化设计一种新型牺牲阳极,使其在与常规阳极质量相当的前提下,增加初期发生电流,使被保护体较快极化到保护电位,后期发生电流降低,满足平均和末期保护电流需要,达到节约牺牲阳极用量的目的。方法通过在传统梯形阳极两侧增加两个翼翅优化设计出新型牺牲阳极,并针对中等规格尺寸的新型阳极与常规阳极进行实海试验。结果质量与常规阳极相近的新型阳极,初期发生电流增加11%,而后逐渐增加到18%,被保护体优先极化到保护电位。翼翅消耗完全后,新型阳极与常规阳极均呈圆柱形,发生电流亦与常规阳极相当。结论所设计的新型牺牲阳极在与常规阳极质量相当的前提下,可使被保护体较快极化到保护电位,节约了牺牲阳极用量。

Design and Performance of New Sacrificial Anode for Marine Engineering (Ⅲ)—Experimental Study on Marine Environment of Middle Size Anode

Objective To design a new anode with configuration optimization to increase the current output in the initial stage, polarize the cathode protected rapidly, decrease current output in the later stage and meet the needs of the average and the end protection current demand, so as to achieve the purpose of saving sacrificial anode, under the premise of similar quality with conventional anode. Methods Two wings of optimization design were added at both sides of the traditional anode to design a new sacrificial anode. Sea test in allusion to new anode and conventional anode of medium dimension was carried out. Results Compared with the conventional anode, the current output of new anode in the initial stage increased by 11%, and then increased to 18%, which promoted the polarization of cathode to the protection potential rapidly. After the wings were completely consumed, both new anode and conventional anode were cylindrical, and their current output was equivalent. Conclusion On the premise of similar quality with conventional anode, the new anode can promote the polarization of cathode protected to the protection potential and saves sacrificial anode.