刘仁辉,刘斌斌,喻玺,杜君峰,肖翔鹏.黄铜表面植酸钝化膜耐蚀性及其成膜机理[J].表面技术,2017,46(9):197-202.
LIU Ren-hui,LIU Bin-bin,YU Xi,DU Jun-feng,XIAO Xiang-peng.Corrosion Resistance and Film Formation Mechanism of Phytic Acid Passivation Film on Brass Surface[J].Surface Technology,2017,46(9):197-202 |
| 黄铜表面植酸钝化膜耐蚀性及其成膜机理 |
| Corrosion Resistance and Film Formation Mechanism of Phytic Acid Passivation Film on Brass Surface |
| 投稿时间：2017-03-15 修订日期：2017-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.09.031 |
| 中文关键词: 黄铜 钝化膜 植酸 成膜机理 |
| 英文关键词:brass passivation film phytic acid film formation mechanism |
| 基金项目:国家自然科学基金（51561008）；江西省科技厅重点工业项目（20161BBE50030） |
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| Author | Institution |
| LIU Ren-hui | a. Engineering Research Institute, Jiangxi University of Science and Technology, Ganzhou 341000, China |
| LIU Bin-bin | b. School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
| YU Xi | Ganzhou Fortune Electronics Co., Ltd, Ganzhou 341000, China |
| DU Jun-feng | Ganzhou Fortune Electronics Co., Ltd, Ganzhou 341000, China |
| XIAO Xiang-peng | a. Engineering Research Institute, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| 中文摘要: |
| 目的 通过化学浸泡法在黄铜表面获得植酸钝化膜，并研究其成膜机理。方法 采用硝酸点滴、中性盐雾试验和极化曲线测试，研究植酸钝化膜的耐蚀性。通过SEM、XRD对植酸钝化膜的形貌和组成进行分析，并测试黄铜试样钝化过程的电位-时间曲线，推测植酸钝化膜的成膜机理。结果 与铬酸盐转化膜对比，黄铜表面植酸钝化膜的自腐蚀电流密度小于铬酸盐转化膜，腐蚀速率比重铬酸盐钝化膜小。经测试，植酸钝化膜的外观平整，结构致密，主要成分为植酸盐、Al2O3和ZnO。钝化过程的电位-时间曲线显示，黄铜试样的电位在前60 s从0.172 V迅速升高到0.157 V，随后电位升高的速度逐渐变缓，在150 s后电位变化微小。结论 在黄铜表面形成的植酸钝化膜具有良好的耐腐蚀性能。植酸钝化膜的成膜过程分为黄铜表面的溶解和植酸钝化膜的形成两个过程。 |
| 英文摘要: |
| The phytic acid passivation film were acquired on the brass surface by Chemical immersion technology, and studied the film formation mechanism. The corrosion resistance of the phytic acid passivation film were studied by nitric acid droplet test, Neutral salt spray test and polarization curves. the morphology and components were analised by SEM and XRD. The potential-time curve were tested in the process of passivation on the brass specimen to speculate the Film-forming mechanism of phytic acid passivating film. Compared with chromate conversion, The corrosion current density of the phytic acid passivation on the brass surface is smaller than that of the chromate conversion film, and the corrosion rate is smaller than the chromate conversion. SEM and XRD results show that the surface of the passivation film is smooth and compact, and the main components are phytate, Al2O3 and ZnO. The potential-time curve show that the brass sample potential rise rapidly from 0.172 V to 0.157 V in the 60 s in the process of passivation. Then the speed of the potential rise gradually slow, finally, potential changes in tiny after 150 s. The phytic acid passivation film on the brass surface has good corrosion resistance, the process of film formation of phytate passivation film included two processes: dissolution of brass surface and formation of phytic acid passivation film. |
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