基于边界元方法的缓蚀剂对结构电偶腐蚀缓蚀效果研究

目的研究THFS-10软膜缓蚀剂和THFS-15长效硬膜缓蚀剂在海洋环境下对于海军某型装备结构电偶腐蚀的缓蚀效果。方法采用等效浸泡测量法,得到ZL115-T5铸铝合金、30Cr Mn Si A钢以及C41500海军黄铜在不同条件下的极化曲线和交流阻抗谱。以此为边界条件,基于边界元方法,对涂覆缓蚀剂后结构的电偶腐蚀行为进行仿真,对比分析两种缓蚀剂对该异种金属连接结构电偶腐蚀的缓蚀效果。结果 THFS-15能够显著减轻上述三种不同材料偶合时的电偶腐蚀,THFS-10则在在一定程度上加速了三者之间的电偶腐蚀。结论根据仿真结果,给出了THFS-10和THFS-15两种缓蚀剂的具体使用建议和注意事项。

Effect of Corrosion Inhibitor on Galvanic Corrosion of Structures Based on Boundary Element Method

Objective To study the inhibition effect of THFS-10 pial corrosion inhibitor and THFS-15 long-term epidural corrosion inhibitor on the galvanic corrosion of a certain naval equipment structure in the marine environment. Methods The equivalent soaking measurement method was used to obtain polarization curves and AC impedance spectroscopies of ZL115-T5 cast aluminum alloy, 30CrMnSiA steel and C41500 Navy brass in different conditions. Based on the boundary condition and the boundary element method, the galvanic corrosion behavior of the structure which was overlaied by the corrosion inhibitor was simulated. The effect of the two inhibitors on the galvanic corrosion of this dissimilar metal connecting structure was obtained by contrasting and analyzing the result of simulation. Results THFS-15 could significantly reduce the galvanic corrosion of the three kinds of different materials, but the galvanic corrosion between these three materials was accelerated to a certain extent when THFS-10 was used. Conclusion According to the simulation results, some specific usage suggestions and notes of THFS-10 and THFS-15 were given out.