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利用分段电极测量了阴极保护下矩形模拟剥离涂层底部Q345钢的电位和电流分布,研究了浓度为0.5 mol/L的静态溶液及充氧动态溶液中,不同阴极保护电位、缝隙宽度以及漏点尺寸条件下缝内阴极极化水平。结果表明,充氧扰动作用减弱了缝内阴极极化水平,致使钢片在扰动溶液环境中比在静态溶液需要更高水平的阴极保护,才能有效抑制缝内金属腐蚀。缝隙宽度和漏点尺寸对充氧扰动改变缝内极化水平的影响明显。
The potential and current distribution of the Q345 steel at the bottom of the rectangular simulated strip coating under cathodic protection were measured by using segmented electrodes. The effects of different cathodic protection potentials, slit widths and leakages on the static solution and oxygenated dynamic solution at a concentration of 0.5 mol / Point-dimensional conditions under the seam cathodic polarization level. The results show that the oxygenation disturbance can weaken the cathodic polarization of the seams, resulting in the steel sheet in the disturbance solution environment than the static solution requires a higher level of cathodic protection, can effectively inhibit the corrosion of the seam metal. The effect of the gap width and the size of the leak point on the change of polarization in the seams with oxygenation disturbance was obvious.