刘琳,黎力,刘成臣,朱立群,张智睿.表面刻蚀粉末冶金黄铜的微观结构和防结蜡性能研究[J].表面技术,2017,46(9):153-159.
LIU Lin,LI Li,LIU Cheng-chen,ZHU Li-qun,ZHANG Zhi-rui.Etching-induced Variation on Microstructure and Waxing Resistance of Brass Fabricated by Powder Metallurgy[J].Surface Technology,2017,46(9):153-159 |
| 表面刻蚀粉末冶金黄铜的微观结构和防结蜡性能研究 |
| Etching-induced Variation on Microstructure and Waxing Resistance of Brass Fabricated by Powder Metallurgy |
| 投稿时间：2017-03-15 修订日期：2017-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.09.024 |
| 中文关键词: 粉末冶金 黄铜 表面刻蚀 微观结构 超亲水性 防结蜡 |
| 英文关键词:powder metallurgy brass, surface etching microstructure super-hydrophilic property anti-waxing |
| 基金项目:国家自然科学基金青年基金项目（51304214） |
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| Author | Institution |
| LIU Lin | School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
| LI Li | School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
| LIU Cheng-chen | School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
| ZHU Li-qun | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| ZHANG Zhi-rui | School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
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| 中文摘要: |
| 目的 原油运输中管道结蜡问题严重影响正常的生产运输，通过表面刻蚀的方法，获得具有超亲水性的粉末冶金黄铜表面，从而达到良好的防结蜡性能。方法 结合不同刻蚀时间下的表面微观结构、粗糙特性和润湿特性，对防结蜡性能进行系统研究。采用FeCl3溶液，刻蚀粉末冶金黄铜试样不同时间，通过X射线衍射仪和扫描电子显微镜对刻蚀表面的成分和形貌进行分析，利用接触角测量仪测量样品表面润湿性，最后对刻蚀后的黄铜进行防结蜡测试。结果 表面刻蚀过程实为“脱锌”，在试样表面形成了微纳米级颗粒粗糙结构。随着刻蚀时间的延长，最大轮廓高度Rz相应增大。与未刻蚀试样相比，刻蚀后的试样表面水接触角大幅降低，防结蜡性能显著提升。当刻蚀时间为120 min时，水接触角远小于30°，粉末冶金黄铜表面达到超亲水状态，防结蜡测试后，约80%表面为干净的原始表面，几乎没有石蜡吸附。结论 刻蚀表面的亲水成分和棱锥状铜单质颗粒组成的微细粗糙结构，使得其在水相中形成稳定的“水膜”，这层水膜可以有效阻止油相中石蜡的析出与沉积，达到良好的防结蜡效果。 |
| 英文摘要: |
| Pipeline waxing in crude oil transportation seriously affects normal production and transportation. The work aims to obtain a super-hydrophilic powder metallurgy brass surface by surface etching, so as to achieve good waxing resistance. A systematic study was done on the waxing resistance after anti-wax test by combining surface microstructure, roughness and wettability at different etching time. Ferric chloride solution was used to etch the powder metallurgy brass specimen at different etching time. Composition and morphology of the etched surface were analyzed with X-ray diffractometer and scanning electron microscope. Surface wettability of the specimen was measured with a contact angle meter. Surface etching was indeed a process of “dezincification”. Micro-nano particle coarse structure was formed on the surface of specimen. As the etching time prolonged, the maximum contour height Rz increased accordingly. Compared with untreated samples, water contact angle of the surface of specimen was greatly reduced after being etched and the waxing resistance was improved remarkably. When the etching time was 120 min, the water contact angle was far less than 30°, and powder metallurgy brass surface achieved super-hydrophilic state. About 80% of the surface was clean original surface after anti-waxing test, almost no paraffin was absorbed. Stable “water film” is formed in aqueous phase due to the fine rough structure consisting of hydrophilic composition and pyramid shaped copper particles on the etched surface. This film can effectively prevent precipitation and deposition of paraffin in oil phase, and further achieve good waxing resistance. |
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