碳钢焊缝在混凝土孔隙液中的优先腐蚀行为与亚硝酸盐缓蚀剂作用效果
发布时间：2019-04-18 23:04
【摘要】：通过8通道耦合阵列多电极系统以及腐蚀试片的浸泡实验研究了碳钢焊缝在模拟混凝土孔隙液中的腐蚀行为以及亚硝酸盐缓蚀剂的作用效果。通过测量开路电位、耦合电位以及电偶电流观测焊缝区域(Weld metal)、热影响区域(Heat affected zone)与母材区域(Base metal)之间的电偶腐蚀以及亚硝酸盐缓蚀剂对焊缝部位的作用效果。耦合阵列多电极系统以及腐蚀试片的浸泡实验结果共同表明,在含有Cl-的模拟混凝土孔隙液中,Q235的WM及其附近区域会发生优先腐蚀。同时,亚硝酸盐缓蚀剂能够明显减小不同区域之间的电偶电流,从而减小焊缝处的局部腐蚀风险。
[Abstract]:The corrosion behavior of carbon steel weld in simulated concrete pore solution and the effect of nitrite corrosion inhibitor were studied by 8-channel coupling array multi-electrode system and immersion experiment of corrosion specimens. By measuring the open circuit potential, coupling potential and galvanic current, the galvanic corrosion between (Weld metal), heat affected zone (Heat affected zone) and base metal region (Base metal) in weld seam and the effect of nitrite inhibitor on weld seam were observed. The results of coupled array multi-electrode system and immersion test of corrosion specimens show that the WM of Q235 and its adjacent areas will be first corroded in the simulated concrete pore solution containing Cl-. At the same time, the nitrite corrosion inhibitor can obviously reduce the galvanic current between different regions, thus reducing the local corrosion risk at the weld.
【作者单位】： 大连理工大学船舶工程学院;大连理工大学物理与光电学院;
【基金】：十三五国家科技支撑计划项目(2016ZX05057006) 中央高校基本科研业务费专项资金(DUT15YQ36;DUT15TD36)
【分类号】：TG172.2
本文编号：2460369
[Abstract]:The corrosion behavior of carbon steel weld in simulated concrete pore solution and the effect of nitrite corrosion inhibitor were studied by 8-channel coupling array multi-electrode system and immersion experiment of corrosion specimens. By measuring the open circuit potential, coupling potential and galvanic current, the galvanic corrosion between (Weld metal), heat affected zone (Heat affected zone) and base metal region (Base metal) in weld seam and the effect of nitrite inhibitor on weld seam were observed. The results of coupled array multi-electrode system and immersion test of corrosion specimens show that the WM of Q235 and its adjacent areas will be first corroded in the simulated concrete pore solution containing Cl-. At the same time, the nitrite corrosion inhibitor can obviously reduce the galvanic current between different regions, thus reducing the local corrosion risk at the weld.
【作者单位】： 大连理工大学船舶工程学院;大连理工大学物理与光电学院;
【基金】：十三五国家科技支撑计划项目(2016ZX05057006) 中央高校基本科研业务费专项资金(DUT15YQ36;DUT15TD36)
【分类号】：TG172.2
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