Electrochemical behavior of solvent-free coal tar epoxy coating in simulated soil solution

  • YAO Jing-di1 ,
  • LIANG Cheng-hao*1 ,
  • HUANG Nai-bao1 ,
  • WU Jian-hua2 ,
  • SUN Zhen-ye1
Expand
  • (1. Transportation Equipments & Ocean Engineering College,Dalian Maritime University,Dalian 116026,China; 2.State Key Laboratory for Marine Corrosion and Protection,China Shipbuilding Industry 725 Research Institute,Xiamen 361101,China)

Received date: 2014-07-18

  Revised date: 2014-09-01

  Online published: 2014-09-01

Abstract

By electrochemical techniques, the electrochemical behavior of the solvent-free epoxy coal tar coating was investigated in a simulated chlorine coastal saline solution. Results show that the open circuit potential of the solventfree epoxy coal tar coating increase with coating thickness in simulated coastal saline solution, which indicate that the increase of coating thickness improved its shielding effect for preventing the corrosive solution. There is no corrosive solution in coating/substrate interface after the coating with 60μm immersed in simulated chlorine coastal saline solution for 30 days. There is only one capacitive reactance arc on EIS at open circuit potential and the resistance is 8×108 Ω·cm2, which mean the coating has formed an effective shield with high resistor and low capacitor. So it can provide an effective protection for Q235 carbon steel.

Cite this article

YAO Jing-di1 , LIANG Cheng-hao*1 , HUANG Nai-bao1 , WU Jian-hua2 , SUN Zhen-ye1 . Electrochemical behavior of solvent-free coal tar epoxy coating in simulated soil solution[J]. Journal of Dalian Maritime University, 2015 , 41(1) : 124 -128 . DOI: 10.16411/j.cnki.issn1006-7736.2015.01.023

References

[1]王泳厚.实用涂料防腐蚀技术手册[M] .北京:冶金工业出版社, 1994. WANG Yong-hou. Manual of anticorrosion technology for paintings [M].Beijing: Metallurgical Industry Press,1994.(in Chinese) [2]张莉,张东,但贵萍.浅析环氧煤焦沥青涂料的研究现状及进展[J].涂料技术与文摘,2009,30(10): 22-25. ZHANG Li, ZHANG Dong, DAN Gui-ping. Review on coal tar epoxy coatings[J].Coatings Technology & Abstracts, 2009, 30(10): 22-25.(in Chinese) [3]刘小平,李泉明,杨雪梅. 无溶剂环氧煤焦沥青防腐涂料[J].涂料工业,1998, 28(5): 33-36. LIU Xiao-ping, LI Quan-ming, YANG Xue-mei. Solventfree coal tar epoxy anticorrosion coating[J].Paint & Coating Industry,1998, 28(5): 33-36.(in Chinese) [4]MAFI R, MIRABEDINI S M, NADERI R, et al. Effect of curing characterization on the corrosion performance of polyester and polyester/epoxy powder coatings[J]. Corrosion Science, 2008, 50:3280-3286. [5]RADHAKRISHNAN S, SONAWANE N, SIJU C R. Epoxy powder coatings containing polyaniline forenhanced corrosion protection[J]. Progress in Organic Coatings, 2009, 64: 383-386. [6]林碧兰,路新瀛,李龙. PHC管桩3种常用金属端头在土壤模拟液中的电化学腐蚀行为[J]. 四川大学学报:工程科学版, 2010, 42(6): 202-207. LIN Bi-lan, LU Xin-ying, LI Long. Electrochemical corrosion behaviors of three commonly used metal ends of PHC pipe pile in simulated soil solutions[J].Journal of Sichuan University: Engineering Science Edition, 2010, 42(6): 202-207.(in Chinese) [7]李朝阳,邱大健,谢国先,等.环氧树脂的无机增韧改性研究[J].涂装与电镀,2007 (4): 14-18. LI Chao-yang, QIU Da-jian, XIE Guo-xian, et al. Study on inorganic toughening modification for epoxy resin[J].Painting & Electroplating,2007 (4): 14-18.(in Chinese) [8]任绍梅,熊杰明.煤沥青中原生QI性质分析[J].燃料与化工,2008, 39(2): 31-34. REN Shao-mei,XIONG Jie-ming. Analysis of primary QI nature in coal tar pitch[J].Fuel & Chemical Processes, 2008,39(2):31-34.(in Chinese) [9]许斌,李其祥,张学信.用红外光谱研究煤沥青黏结剂及其炭化产物[J].炭素技术,1996,15(2):17-19. XU Bin, LI Qi-xiang, ZHANG Xue-xin. Study on coal tar pitch and its carbonized products with IR[J].Carbon Techniques,1996,15(2):17-19.(in Chinese) [10]谢德明,童少平,胡吉明,等.多道富锌基涂层在NaCl溶液中的电化学行为[J].金属学报,2004, 40(7): 749-753. XIE De-ming, TONG Shao-ping, HU Ji-ming, et al. Study of the electrochemical behaviors of the zincrich paints based multilayer organic coatings in NaCl solution[J].Acta Metallurgica Sinica, 2004, 40(7): 749-753.(in Chinese) [11]GUILLAUMIN V, LANDOLT D. Effect of dispersion agent on paint on steel studied by scanning acoustic microscopy and the degradation of a water borne impedance[J]. Corrosion Science, 2002,44(1):179-189. [12]曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科技出版社,2002. CAO Chu-nan, ZHANG Jian-qing. An introduction to electrochemical impedance spectroscopy[M].Beijing: Chemical Industry Press,2005.(in Chinese) [13]RAMROELT U,REINHARD G. Application of corrosion inhibitors in waterborne coatings[J]. Progress in Organic Coatings,1992,21:205. [14]MONTEMORA M F, SNIHIROVAA D V ,TARYBAA M G ,et al. Evaluation of selfhealing ability in protective coatings modified with combinations of layered double hydroxides and cerium molibdate nanocontainers filled with corrosion inhibitors[J]. Electrochimica Acta, 2012, 60(15): 31-40. [15]张金涛, 胡吉明, 张鉴清. 有机涂层的现代研究方法 [J]. 材料科学与工程学报, 2003, 21(5): 763-768. ZHANG Jin-tao, HU Ji-ming, ZHANG Jian-qing. A review on modern study methods of organic coatings[J].Journal of Materials Science & Engineering,2003,21(5): 763-768.(in Chinese) [16]GONZALEZ S, CACERES F, FOX V, et al. Resistance of metallic substrates protected by an organic coating containing aluminum powder [J].Progress in Organic Coatings, 2003,46(4)317-323.
Outlines

/