X70管线钢在海水中的腐蚀特性与防腐涂层性能研究
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摘要
研究常温和40℃的温度环境下,X70钢在模拟海水中的腐蚀性能。介质为模拟海水,分别对表面抛光和表面带有防腐涂层的X70钢试样进行浸泡腐蚀试验,对其产物观察取样并进行SEM和XRD扫描,得到其腐蚀垢层微观形貌图和成分分析图。对X70钢进行电化学腐蚀测试,结果表明,同温度下,腐蚀电流密度随着浓度的增加而增大,腐蚀速率随着浓度的增加而增大;同浓度下,腐蚀电流密度随着温度的升高而增加,腐蚀速率随着温度的升高而增大。对X70钢在海水条件下的腐蚀速率、腐蚀产物以及防腐涂层性能等进行了全面的分析,所得数据真实可靠,为海水所用X70钢的腐蚀性能分析及防腐方法提供了理论和试验依据。
In order to study corrosion of X70 steel in simulated seawater,the test condition were set up at ordinary temperature and temperature of 40℃,the X70 steel corrosion immersion tests include the test sample's surface with the finished surface and the corrosion resistant coating.Their producing sampling was scanned with SEM and XRD,the etching microscopic scale topography and composition analysis chart were gotten.The X70 steel electrochemical corrosion was tested.The results showed that at the same temperature,corrosion ampere density increased with the concentration increasing,and at the same concentration,the corrosion ampere density increased with temperature increasing.The X70 steel's corrosion rate,corrosion products and performance anti-corrosion coating in seawater were conducted a comprehensive analysis.The gotten data were reliable,and can provide theoretical and experimental proof for methods of X70 steel used in seawater corrosion and corrosion analysis.
In order to study corrosion of X70 steel in simulated seawater,the test condition were set up at ordinary temperature and temperature of 40℃,the X70 steel corrosion immersion tests include the test sample's surface with the finished surface and the corrosion resistant coating.Their producing sampling was scanned with SEM and XRD,the etching microscopic scale topography and composition analysis chart were gotten.The X70 steel electrochemical corrosion was tested.The results showed that at the same temperature,corrosion ampere density increased with the concentration increasing,and at the same concentration,the corrosion ampere density increased with temperature increasing.The X70 steel's corrosion rate,corrosion products and performance anti-corrosion coating in seawater were conducted a comprehensive analysis.The gotten data were reliable,and can provide theoretical and experimental proof for methods of X70 steel used in seawater corrosion and corrosion analysis.
引文
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[2]黄桂桥.Cr对钢耐海水腐蚀性能的影响[J].腐蚀科学与防护技术,2000,12(2):86-89.
[3]Liu X H,Wen Y F,Zhu X J,et al.Corrosion rate prediction of 3Csteel under different seawater environment by using support vector regression[J].Corrosion Science,2009,51(2):349-355.
[4]Melchers R E.Extreme value statistics and long-term marine pitting corrosion of steel[J].Probabilistic Engineering Mechanics,2008,23(4):482-488.
[5]肖珩,汪崧,黄震中,等.新型耐海水腐蚀低合金钢l0CrCuSiV锈层分析研究报告[J].北京科技大学学报,1997,9(5):476-481.
[6]Yamashita M,Uchida H.Recent research and development in solving atmospheric corrosion problem of steel industries in Japan[J].Hyperfine Interactions,2002,139/140:153-166.
[7]Melchers R E.Effect of small compositional changes on marine immersion corrosion of low alloy steels[J].Corrosion Science,2004,46(7):1669-1691.
[8]帅健,张春娥,陈福来.腐蚀管道剩余强度评价方法的对比研究[J].天然气工业,2006(11):122-125,184.
[9]Wang X T,Duan J Z,Zhang J,et al.Alloy elements’effect on anti-corrosion performance of low alloy steels in different sea zones[J].Science Direct,2008,62(8/9):1291-1293.
[10]Melchers R E.Effect on marine immersion corrosion of carbon content of low alloy steels[J].Corrosion Science,2003,45(11):2609-2625.
[11]王丹丹,李溪滨,刘如铁,等.镍基耐海水腐蚀材料的研究概况[J].湖南冶金,2004,24(1):9-13.
[12]帅健,许葵.腐蚀管线的失效概率评定方法[J].石油学报,2003,24(4):86-89.
[13]帅健.腐蚀管线的剩余强度预测[J].石油大学学报:自然科学版,2003,27(4):91-93.
[14]侯文泰,于敬敦,梁彩凤.碳钢及低合金钢的大气腐蚀[J].中国腐蚀与防护学报,1993,1(4):291-302.