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

发布时间：2019-04-12 12:14

【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。
[Abstract]:The surface of X80 pipeline steel was chemically etched by acid solution, and the microstructure of X80 pipeline steel was formed by chemical etching. Then, the surface energy of steel substrate was reduced by modification of low surface energy substance Heptafluordecyl triethoxysilane, thus the double hydrophobic surface of super hydrophobic and hydrophobic oil was successfully prepared. The effects of acid etching and fluorination on the surface morphology and wettability were studied, and the corrosion resistance of the double hydrophobic surface was studied by electrochemical test. The results showed that after acid etching and fluorination for 4 h, the contact angles between the surface and deionized water, glycerol, ethylene glycol and cetane reached 161 掳, 156 掳, 151.5 掳and 146 掳, respectively, and the contact angles between the surface and deionized water, glycerol, ethylene glycol and cetane reached 161 掳, 151.5 掳and 146 掳, respectively. The double-hydrophobic effect of super-hydrophobic and oil-thinning was realized. Compared with the untreated X80 pipeline steel samples, the corrosion potential of the double hydrophobic surface shifted positively, while the corrosion current density decreased by two orders of magnitude, indicating that the corrosion resistance of the double sparse samples was significantly improved.
【作者单位】：中国海洋大学材料科学与工程研究院;
【分类号】：TG174.4

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