碳纤维改性硅酸盐对含氯环境下接地材料的腐蚀防护特性研究

Corrosion Protection Properties of Carbon Fiber Modified Silicates for Grounding Materials in Chlorine-Containing Environments

为了改善电力设施接地材料腐蚀防护性能,提升电力装备可靠性,本研究研制了一种电阻率低、防腐效果优异的碳纤维改性硅酸盐接地材料,并通过电导率测试和浸泡试验对其导电性能和防腐性能进行了测试表征。结果表明碳纤维含量为0.25(质量百分比,下同)时,改性硅酸盐材料电阻率为0.685Ω·m;碳纤维含量增加到1.27时,改性硅酸盐材料电阻率为0.069Ω·m,随着碳纤维含量的增加,改性硅酸盐材料电阻率的波动出现较为显著的降低。采用碳纤维改性硅酸盐接地材料包覆不锈钢、Q235、镀锌钢和铜后,在不同浓度NaCl溶液和6 V偏压条件下,其腐蚀速率从小到大依次为不锈钢<铜<Q235<镀锌钢。进一步通过土壤埋片试验发现,碳纤维改性硅酸盐材料包覆Q235试片后使其腐蚀速率显著降低。

To improve the corrosion protection performance of grounding materials of power facilities and further enhance the reliability of power equipment,a carbon fiber modified silicate grounding material with low resistivity and excellent anti-corrosion performance was developed,and its electrical conductivity and anti-corrosion performance were tested and characterized by conductivity test and immersion test.The results show that the carbon fiber content is 0.25(weight percentage,same below),the resistivity of the modified silicate material is 0.685Ω·m.With the increasing of the carbon fiber addition content(1.27),the resistivity of the modified silicate material decreases to 0.069Ω·m.Moreover,as the carbon fiber addition content increases,the fluctuation of the resistivity of the modified silicate material decreases significantly reduced.Under the condition of NaCl solution and 6 V bias voltage,the corrosion rate of the grounding material coated by modified silicate from small to large is stainless steel<copper<Q235<galvanized steel.Further through the soil burying test,it is found that the corrosion rate of the Q235 sample is significantly reduced after they are coated by the modified silicate material.