接地材料在模拟溶液与现场埋片的腐蚀及相关性研究

采用极化试验、浸泡试验和埋片试验研究了铜包钢、Q235钢和非金属涂层的腐蚀行为并分析了其相关性。结果表明在南昌、武汉、成都、天津4个腐蚀环境中，利用土壤模拟溶液极化试验（试验周期极短）、土壤模拟溶液浸泡试验（试验周期为30d）和埋片试验（试验周期为1a）3种试验方法，得出铜包钢的耐腐蚀性能最强，其次为非金属涂层，最差为Q235钢；铜包钢和Q235钢2种接地材料利用土壤模拟溶液试验与埋片试验的相关性非常强。针对铜包钢和Q235钢2种接地材料，采用土壤模拟溶液试验可较为快速地比较其在4种地区的腐蚀性强弱；而非金属涂层受环境体系的影响较大，2种试验在4种类型的腐蚀地区并无相关性。

Research on Corrosion and Correlation of Grounding Materials in Simulated Solution and Metal Specimens Buried in Underground

The paper uses polarization test， immersion test and burying test to make a study of the corrosion behavior of copper-clad steel， Q235 steel and non-metallic coating， and analyzes their correlation. Three tests are done， including the polarization test with simulated soil solution （over a very short period）， the immersion test with simulated soil solution （in a period of 30 days） and the burying test （in a period of one year）. The results show that in the four corrosive environments of Nanchang，Wuhan，Chengdu and Tianjin， the copper-clad steel has the highest corrosion resistance， followed by the non-metallic coating； The Q235 steel has the weakest corrosion resistance. Indeed there is a strong correlation between the copper-clad steel and the Q235 steel with the simulated soil solution test and the burying test. For the copper clad steel and Q235 steel，their corrosiveness in the four areas can be quickly compared with the simulated soil solution test. The non-metallic coating is greatly affected by the environmental system，the two tests have no correlation in the four types of corrosion areas.