导电防腐蚀涂层对电网接地体碳钢的防护行为
Protective Performance of Conductive Anti-corrosion Coatings on Grounding Grid Carbon Steel
摘 要
采用物理混合工艺在电网接地体Q235碳钢表面制备了环氧树脂基导电防腐蚀涂层。通过电化学方法和杂散电流腐蚀试验分别测试了涂层在酸性土壤模拟液和土壤中对碳钢的防护行为。结果表明，Q235碳钢在土壤模拟液中腐蚀严重，导电防腐蚀涂层有效抑制了Q235碳钢的腐蚀，涂层在土壤模拟液中具有良好的稳定性。在10 mA直流和100 V交流杂散电流土壤中腐蚀1 000 h后，涂层显示了良好的耐蚀性。电化学极化曲线表明导电防腐蚀涂层有效提高了Q235碳钢的耐腐蚀性能。
碳钢
环氧树脂
导电涂层
土壤腐蚀
杂散电流
电化学
grounding grid
carbon steel
epoxy resin
conductive coating
soil corrosion
stray current
electrochemistry
Abstract
Epoxy based conductive anti-corrosion coatings on grounding grid Q235 carbon steel surface were prepared by physical mixing process. The protective effect of the coatings was investigated by electrochemical method in simulated soil solution; and the stray current resistance of the coatings in soils was also studied. The results indicated that Q235 carbon steel suffered serious corrosion in simulated soil solution, and there was no corrosion detected for the steel coated with conductive anti-corrosion coatings, and the coatings remained stabilization in simulated soil solution. The coatings showed excellent corrosion resistance in both cases of 100 V alternating and 10 mV direct stray currents after exposion for 1 000 h. The potentiodynamic polarization curves indicated that the conductive coatings improved the corrosion resistance of Q235 steel.
中图分类号 TG174.4 DOI 10.11973/fsyfh-201601001
所属栏目 试验研究
基金项目 国家自然科学基金(51271188); 中国南方电网公司科技项目(K-GD2013-051)
收稿日期 2015/12/24
修改稿日期
网络出版日期
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备注王成(1971-)，副研究员，博士,从事金属腐蚀与防护工作,
引用该论文: LIU Shi-nian,WANG Cheng,LV Wang-yan,MA Cun-ren,ZHU Sheng-long,WANG Fu-hui. Protective Performance of Conductive Anti-corrosion Coatings on Grounding Grid Carbon Steel[J]. Corrosion & Protection, 2016, 37(1): 1
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【2】SOSA E,ALVAREZ R J. Time-correlations in the dynamics of hazardous material pipelines incidents[J]. Journal of Hazardous Materials,2009,165(1/3):1204-1209.
【3】BRETON T J C,GHENO S,ALAMILLA J L,et al. Identification of failure type in corroded pipelines:a bayesian probabilistic approach[J]. Journal of Hazardous Materials,2010,179(1/3):628-634.
【4】YAN M C,SUN C,XU J,et al. Role of Fe oxides in corrosion of pipeline steel in a red clay soil[J]. Corrosion Science,2014,80:309-317.
【5】WANG X T,DUAN J Z,LI Y,et al. Corrosion of steel structures in sea-bed sediment[J]. Bulletin of Materials Science,2005,28(2):81-85.
【6】USHER K M,KAKSONEN A H,COLE I,et al. Critical review:microbially influenced corrosion of buried carbon steel pipes[J]. International Biodeterioration & Biodegradation,2014,93:84-106.
【7】WAN Y,DING L,WANG X M,et al. Corrosion behaviors of Q235 steel in indoor soil[J]. International Journal of Electrochemical Science,2013,8(12):12531-12542.
【8】朱敏,杜翠薇,李晓刚,等. Q235钢在北京土壤环境中的腐蚀行为[J]. 中国腐蚀与防护学报,2013,33(3):199-204.
【9】张大磊,王伟,李焰. 热镀锌钢材的电偶腐蚀行为-划痕型缺陷[J]. 材料研究学报,2009,23(4):343-346.
【10】TSAI C Y,LIU J S,CHEN P L,et al. A roll coating tungstate passivation treatment for hot-dip galvanized sheet steel[J]. Surface & Coatings Technology,2011,205(21/22):5124-5129.
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【12】OTERO E,ROYUELA J J. The assessment of short term data of pipe corrosion in drinking water-I galvanized steel[J]. Corrosion Science,1993,34(10):1581-1593.
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【14】LOPES I M F,LOUREIRO C R O,JUNQUEIRA R M R. Corrosion monitoring of galvanized steel in soil extract solutions by electrochemical impedance spectroscopy[J]. Materials Science & Engineering Technology,2014,45(7):619-627.
【15】原徐杰,张俊喜,张世明,等. 镀锌层破损输电杆塔用镀锌钢在干湿交替作用下的腐蚀行为[J]. 中国腐蚀与防护学报,2013,33(5):395-399.
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【17】SORENSEN P A,KIIL S,JOHANSEN K D,et al. Anticorrosive coatings:a review[J]. Journal of Coatings Technology and Research,2009,6(2):135-176.
【18】傅敏. 导电涂料以及导电材料在导电涂料中的应用发展概况[J]. 涂料技术与文摘,2006,2:5-11,23.
【19】MARTIN B. A history of stray current corrosion[J]. Corrosion & Materials,2006,31(3):12-14.
【20】闫爱军,陈沂,冯拉俊. 几种接地网材料在土壤中的腐蚀特性研究[J]. 腐蚀科学与防护技术,2010,22(3):197-199.
【21】宋吟蔚,王新华,何仁洋,等. 埋地钢质管道杂散电流腐蚀研究现状[J]. 腐蚀与防护,2009,30(8):515-518.
【22】王森,胡亚博,李志忠,等. 碳添加型导电涂层在陕北土壤模拟溶液中的腐蚀行为研究[J]. 腐蚀科学与防护技术,2013,25(6):489-494.
【23】曹楚南,张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002.
【24】CHEN Y,WANG X,LI J,et al. Long-term anticorrosion behaviour of polyaniline on mild steel[J]. Corrosion Science,2007,49(7):3052-3063.
【25】GRGUR B,ELKAIS A,GVOZDENOVC M,et al. Corrosion of mild steel with composite polyaniline coatings usingdifferent formulations[J]. Progress in Organic Coatings,2015,79(1):17-24.
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【27】张鉴清,曹楚南. 电化学阻抗谱方法研究评价有机涂层[J]. 腐蚀与防护,1998,19(3):99-104.
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【29】周钟泉,李劲,张立新,等. 阴极保护条件下环氧基界面粘附性研究[J]. 腐蚀科学与防护技术,1998,10(3):146-149.
【30】梁平辉,胡世红,苏浩. 抗阴极剥离的重防腐环氧粉末涂料配方研究[J]. 涂料工业,2008,38(7):22-25.
【31】BERTOLINI L,CARSANA M,PEDEFERRI P. Corrosion behaviour of steel in concrete in the presence of stray current[J]. Corrosion Science,2007(49):1056-1068.
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