钻杆用双酚A甲醛酚醛环氧树脂内涂层的失效规律
Bis-phenol A Formaldehyde Phenolic Epoxy Resin Internal Coating Used for Drill Pipes
摘 要
采用电化学阻抗谱、高温高压釜试验以及断口扫描电镜(SEM)分析技术, 研究了双酚A甲醛酚醛环氧树脂管道内涂层在含饱和H2S/CO2的3.5%NaCl(质量分数)水溶液中不同温度下的失效规律。结果表明, 在电化学阻抗测试中, 随着温度(50 ℃, 70 ℃, 90 ℃)的升高, 涂层失效减缓; 在高温高压釜16 h试验后, 涂层表观正常(未出现起泡、开裂、表面颜色无明显变化)、附着力良好; 结合端口扫描电镜(SEM)技术, 进一步证明温度升高会导致涂层在含H2S/CO2的3.5%NaCl溶液中失效减缓。
涂层失效
电化学阻抗谱
H2S/CO2
bis-phenol A formaldehyde phenolic epoxy resin
failure analysis
EIS
H2S/CO2
Abstract
Electrochemical impedance spectroscopy(EIS), scanning electron microscopy(SEM) and autoclave experiment were used to study the failure law of of bis-phenol A formaldehyde phenolic epoxy resin coating on pipeline steel N80 at different temperatures. The specimens were immersed in 3.5% (mass fraction) NaCl solution saturated with hydrogen sulfide and carbon dioxide(H2S/CO2). The EIS shows that with increasing temperature(50 ℃, 70 ℃ and 90 ℃) , the coating failure was slowed down. After 16 hours autoclave experiment, the apparance of the coating was normal(without blistering, cracking and significant change in surface color) and the coating was well adhered; The SEM results were in agrement with the EIS results.
中图分类号 TE988.2
所属栏目 应用技术
基金项目
收稿日期 2012/3/26
修改稿日期
网络出版日期
作者单位点击查看
备注何毅, 副教授, 博士,
引用该论文: HE Yi,ZHOU Bin-ge,XU Zhong-hao,HUANG Xiao-zhen,XUE Shi-lei,YANG Jing. Bis-phenol A Formaldehyde Phenolic Epoxy Resin Internal Coating Used for Drill Pipes[J]. Corrosion & Protection, 2013, 34(3): 245
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参考文献
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【2】张盈盈, 张丽萍, 韩文礼.利用电化学技术测试不同环氧涂层的扩散系数[J].腐蚀与防护, 2009, 9(9): 665-301.
【3】吕树斌, 何毅, 施太和.钻杆用环氧树脂内涂层的微观结构及性能评价[J].表面技术, 2011, 4(2):101-103.
【4】刘浩宇.静水压力下Q235钢环氧涂层在3.5%NaCl溶液中的失效过程[J].中国腐蚀与防护学报, 2010, 10(5): 374-378.
【5】Abayarathna D, Naraghi A, Wang S H. The effect of surface films on corrosion of carbon steel in a CO2-H2S-H2O system[C]//Corrosion/2005, Houston:NACE, 2005, Paper No.05624.
【6】于秦, 王志成.酚醛树脂对环氧防蚀涂料的改性研究[J].腐蚀与防护, 1999, 2(2): 69-72.
【7】高立新, 张大全, 蒋凯.改性环氧涂层的防腐蚀性能研究[J].腐蚀与防护, 2001, 21(8): 353-345.
【8】张颖怀, 许立宁, 路民旭.用电化学阻抗谱(EIS)研究环氧树脂涂层的防腐蚀性能[J].腐蚀与防护, 2007, 5(5): 227-234.
【9】张鉴清, 曹楚南.电化学阻抗谱方法研究有机涂层[J].腐蚀与防护, 1988, 19(3): 99-104.
【10】Valdes A.The effect of small amounts of H2S on CO2corrosion of a carbon steel[J].Corrosion, 1998, 54(10):816-825.
【11】周计明.油管钢在含H2S/CO2高温高压水介质中的腐蚀行为及防护技术的作用[D].西安: 西北工业大学硕士学位论文, 2002.
【12】张清, 李全安, 文九巴.H2S/CO2对油气管材的腐蚀规律及研究进展[J].腐蚀与防护, 2003(4): 243-281.
【13】Ueda M. Effect of alloying elements and microstucture on stability of corrosion product in H2S/CO2corrosion of carbon steel[C]//Corrosion/2003, Houston:NACE, 2003, Paper No.03339.
【14】Sun W, Nesic s, Papavinasam S. Kinetics of iron sulfide and mixed iron sulfide/carbonate scale precipitation in H2S/CO2 corrosion[C]//Corrosion/2006, Houston:NACE, 2006, Paper No.06644.
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