混酸刻蚀-氟化处理制备X80管线钢双疏表面及其耐蚀性研究

doi:10.11902/1005.4537.2016.017

中国腐蚀与防护学报

2017, Vol. 37

Issue (3): 233-240 DOI: 10.11902/1005.4537.2016.017

本期目录 | 过刊浏览

混酸刻蚀-氟化处理制备X80管线钢双疏表面及其耐蚀性研究

任继栋,高荣杰(

),张宇,刘勇,丁甜

中国海洋大学材料科学与工程研究院青岛 266100

Fabrication of Amphiphobic Surface of Pipeline Steel by Acid Etching and Its Anti-corrosion Properties

Jidong REN,Rongjie GAO(

),Yu ZHANG,Yong LIU,Tian DING

School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

全文: PDF(7630 KB) HTML

摘要:

通过酸性溶液对X80管线钢表面进行化学刻蚀,形成具有一定结构的微观粗糙形貌;然后通过低表面能物质十七氟癸基三乙氧基硅烷的修饰,降低钢材基底的表面能,从而成功地制备出超疏水疏油的双疏功能表面。研究了酸性刻蚀和氟化处理对表面形貌及其润湿性的影响,并通过电化学测试研究了双疏表面的耐蚀性能。结果表明：经过4 h的酸性刻蚀与氟化处理,所制备的超疏水疏油表面与去离子水,丙三醇,乙二醇和十六烷的接触角分别达到161°,156°,151.5°和146°,实现了超疏水与疏油的双疏效果。相比较未经处理的X80管线钢试样,双疏表面的腐蚀电位发生了正向移动,而腐蚀电流密度降低了两个数量级,说明双疏试样耐腐蚀性能得到了显著提高。

关键词 ： X80管线钢, 混酸刻蚀, 氟化处理, 超疏水疏油, 耐蚀性

Abstract：

Pipeline steel has been widely used in modern industry such as the transportation of natural gas and oil. However, its service life is mainly affected by the corrosion because of its hydrophilic and oleophilic properties. In this study, the surface of X80 pipeline steel was converted to be of super-hydrophobicity and oleophobicity by acid etching and fluoride modification. The steel was first etched by a mixed acid solution to roughen its surface, and then modified with a kind of low surface energy material, 1H, 1H, 2H, 2H-Perfluorodecyltriethoxysilane. The fluoride modification can reduce the surface energy, which is an essential step to prepare the amphiphobic surface. The influence of acid etching and modification on the morphology and the wetting behavior of the modified surface was characterized and the corrosion behavior of the amphiphobic surface was studied by potentiodynamic scanning. The result showed that the modified amphiphobic surface exhibits excellent both of hydrophobicity and oleophobicity, for substances such as water, glycerin and ethylene glycol, as well as hexadecane. After 4 h etching and fluoride modification, the contact angles of the modified steel with deionized water, glycerin, ethylene glycol and hexadecane were 161°, 156°, 151.5° and 146° respectively. The modified surface can enhance the corrosion resistance of the pipeline steel and such amphiphobic surface can be easily repaired.

Key words： X80 pipeline steel acid etching fluoroalkyl silane amphiphobicity anti-corrosion

收稿日期: 2016-01-25

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引用本文:

任继栋,高荣杰,张宇,刘勇,丁甜. 混酸刻蚀-氟化处理制备X80管线钢双疏表面及其耐蚀性研究[J]. 中国腐蚀与防护学报, 2017, 37(3): 233-240.
Jidong REN, Rongjie GAO, Yu ZHANG, Yong LIU, Tian DING. Fabrication of Amphiphobic Surface of Pipeline Steel by Acid Etching and Its Anti-corrosion Properties. Journal of Chinese Society for Corrosion and protection, 2017, 37(3): 233-240.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.017 或 https://www.jcscp.org/CN/Y2017/V37/I3/233

图1 酸性刻蚀4 h后管线钢表面形貌的SEM像

表1 不同表面张力的液体与不同表面状态的X80管线钢的接触角

图2 4种液体在X80管线钢原始表面以及双疏表面接触角的变化及液滴在双疏表面接触角的宏观照片

图3 酸性刻蚀前后X80管线钢的XRD谱

图4 X80管线钢经酸性刻蚀和氟化处理后表面的EDS分析结果,氟化处理后表面的XPS全谱和C1s的精细谱

图5 原始试样和双疏表面试样在3.5%NaCl溶液中浸泡40 min,2 h和4 h后的动电位极化曲线及双疏试样浸泡4 h后经再次氟化处理后的极化曲线

表2 极化曲线的电化学拟合参数

图6 X80管线钢在3.5%NaCl溶液中浸泡不同时间后的SEM像

图7 具有双疏表面的试样在3.5%NaCl溶液中浸泡2,8,16和24 h后表面的SEM像

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