温度对油气管道外防腐层性能的影响规律研究
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摘要
采用阴极剥离、剥离强度和附着力测试的方法研究了不同温度下防腐层的损伤规律,总结了3PE、FBE两种防腐层在不同温度下的性能影响规律。研究结果表明:在70℃下3PE的剥离强度降低38.7%,阴极剥离距离增长73.8%,而FBE的附着力也降低了34.1%。说明温度对防腐层的性能有明显的影响,即随着温度升高,防腐层的阴极剥离、剥离强度及附着力性能均发生明显降低,阴极剥离受温度影响也非常显著。
The damage law of the pipeline coating under different temperature is studied through the cathodic disbanding test, peel strength test and adhesion test method, the coating performances of 3 PE and FBE under different temperatures is summarized. The results show that the peel strength of 3 PE is reduced by 38.7% under 70 ℃, the cathodic stripping distance increases by 73.8%, and the adhesion of FBE is reduced by 34.1%. The temperature has obvious influence on the performance of pipeline coating. The cathodic disbanding, the peeling strength and adhesion properties of the pipeline coating are significantly reduced with the temperatures rising, and the cathode stripping is significantly affected by the temperature.
The damage law of the pipeline coating under different temperature is studied through the cathodic disbanding test, peel strength test and adhesion test method, the coating performances of 3 PE and FBE under different temperatures is summarized. The results show that the peel strength of 3 PE is reduced by 38.7% under 70 ℃, the cathodic stripping distance increases by 73.8%, and the adhesion of FBE is reduced by 34.1%. The temperature has obvious influence on the performance of pipeline coating. The cathodic disbanding, the peeling strength and adhesion properties of the pipeline coating are significantly reduced with the temperatures rising, and the cathode stripping is significantly affected by the temperature.
引文
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[12] 熊娟,张婷,蒋勇,等.管道聚乙烯防腐层的阴极剥离性能[J].油气储运,2012,31(6):450-454.
[2] 杨引臣.埋地钢质管道最大保护电位的探讨[J].材料保护,2007,40(12):67-69.
[3] 张贻刚,韩文礼,张彦军,等.长输管道3PE防腐蚀层失效分析[J].腐蚀与防护,2016,37(1):246-249.
[4] WORSLEY D A,WILLIAMS D,LING J S G.Mechanistic Changes in Cut-edge Corrosion Induced by Variation of Organic Coating Porosity[J].Corros.Sci.,2001,43:2335-2348.
[5] 张其滨,张莉.基材变形对3PE防腐层性能的影响[J].石油工程建设,2009,35(6):33-35.
[6] 张金涛.有机涂层中水传输与涂层金属失效机制的电化学研究[D].浙江大学,2005:7-9.
[7] 赵庆华,冯伟章.外界因素对埋地管道沥青防腐层的影响[J].油气储运,1998,17(4):32-35.
[8] 吉建立,许勇,黄龙,等.国内外油气管道防腐层阴极剥离试验方法及标准对比[J].焊管,2013,36(10):68-72.
[9] 蔡克,常大伟,陈志昕,等.油气输送管3PE防腐层抗阴极剥离性能影响因素研究[J].焊管,2010,33(4):26-33.
[10] 崔艳雨,范玥铭,危金卓,等.埋地钢质管道防腐蚀层阴极剥离作用的研究进展[J].材料保护,2016,49(8):62-66.
[11] 赵增元,王佳.有机涂层阴极剥离作用研究进展[J].中国腐蚀与防护学报,2008,28(2):116-119.
[12] 熊娟,张婷,蒋勇,等.管道聚乙烯防腐层的阴极剥离性能[J].油气储运,2012,31(6):450-454.