利用电化学测试和埋片试验研究了交流电干扰下Q235钢和铜在不同含水量北京土壤中短期腐蚀行为.结果表明:交流电对Q235钢与铜的腐蚀起到明显促进作用,对铜影响更大;交流电与土壤含水量对Q235钢的影响有明显的交互作用,对铜则无明显的影响;交流电主要影响材料的阳极反应过程,含水量主要影响材料的阴极反应过程;土壤含水量未达到饱和时,Q235钢与铜表面均发生腐蚀,且随着土壤含水量的增加,腐蚀均逐渐加重,其表面点蚀坑密度和深度均逐渐减小;在土壤含水量达到饱和时,Q235钢与铜表面均又出现较严重点蚀.
The corrosion behavior of Q235 steel and Cu was studied by polarization curve and buried sample experiment in Beijing soil with different soil moisture contents for a short time.Results indicate that alternating current played an obvious role in promoting the corrosion of Q235 steel and Cu,especially for Cu.Obvious interaction was observed between the influence of alternating current and soil moisture on Q235 steel,while the effect of those on Cu was slight.In fact,alternating current had primary effect on the anodic process and soil moisture content mainly influenced the cathodic process.When the soil moisture content was unsaturated,corrosion was found on the surface of both Q235 steel and Cu,and aggravated with the increase of soil moisture content,whereas the density and depth of pitting gradually decreased.However,severe pitting appeared on the surface of Q235 and Cu when the soil moisture was saturated.
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