王骏斌,谢志勇,高平平,伍小波,陶韬,欧阳涛,黄启忠.GO-PTFE-C涂层改性Ti金属板的防腐性能研究[J].表面技术,2019,48(3):149-154.
WANG Jun-bin,XIE Zhi-yong,GAO Ping-ping,WU Xiao-bo,TAO Tao,OUYANG Tao,HUANG Qi-zhong.Corrosion Protection of GO-PTFE-C Composite Coatings on Ti Alloy Plate[J].Surface Technology,2019,48(3):149-154 |
| GO-PTFE-C涂层改性Ti金属板的防腐性能研究 |
| Corrosion Protection of GO-PTFE-C Composite Coatings on Ti Alloy Plate |
| 投稿时间：2018-09-15 修订日期：2019-03-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.03.021 |
| 中文关键词: 钛基双极板 水热法 浸渍法 石墨烯 耐蚀性 质子交换膜燃料电池 |
| 英文关键词:Ti-based bipolar plate hydrothermal impregnation method graphene corrosion resistance proton exchange membrane fuel cell |
| 基金项目:中国国家重点研发计划（No. 2016YFB0101310） |
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| Author | Institution |
| WANG Jun-bin | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| XIE Zhi-yong | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| GAO Ping-ping | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| WU Xiao-bo | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| TAO Tao | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| OUYANG Tao | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| HUANG Qi-zhong | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| 中文摘要: |
| 目的 提高钛金属板的抗腐蚀性能。方法 采用水热浸渍两道工序在Ti双极板上制备GO-PTFE-C复合改性涂层。使用0.1 mol/L葡萄糖溶液作为碳源，在170 ℃+10 h条件下，于反应釜中完成碳涂层制备。对获得的涂层进行热处理，浸渍5%（质量分数）的聚四氟乙烯（PTFE）溶液和不同浓度氧化石墨烯（GO）的混合悬浮液后，在350 ℃热处理得到涂层。采用傅氏转换红外线光谱分析仪（FTIR）、扫描电子显微镜（SEM）和能谱仪（EDS）分析表面形貌和成分，选取三电极体系并利用电化学工作站（CHI 660e）表征改性前后双极板电化学性能，在模拟质子交换膜燃料电池（PEMFC）环境中测试其抗腐蚀性能。结果 与单一的碳涂层相比，GO-PTFE表面具有更多的C=O官能团，同时由于聚四氟乙烯表面的F与含氧官能团的氧原子电子云的诱导效应，涂层附着力明显提高。其中，采用5%PTFE+3 g/L GO浸渍的涂层的腐蚀电流密度和接触角分别为0.008 μA/cm2和103.6°，恒电位极化测试（0.6 V和－0.1 V）显示，涂层的腐蚀电流密度均低于1 μA/cm2。结论 以碳涂层为基体，浸渍GO和PTFE的混合液后，制备所得的钛基双极板在PEMFC的双极板中显示出巨大的应用前景。 |
| 英文摘要: |
| The work aims to improve corrosion resistance of Ti alloy plate. Two-step hydrothermal impregnation method was adopted to prepare GO-PTFE-C composite coating on Ti bipolar plates. 0.1 mol/L glucose solution was used as carbon source to prepare carbon coating in a reaction still after 170 ℃ + 10 h hydrothermal impregnation treatment. The as-received coating was subsequently impregnated with 5wt.% polytetrafluoroethylene (PTFE) solution containing different amount of graphene oxide (GO) and treated at 350 ℃. Fourier Transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) were applied to characterize the surface morphology and composition of coating. Besides, by electrochemical workstation (CHI 660e), a 3-compartment cell was configured to characterize the electrochemical performances of bipolar plates before/after surface modification, and test corrosion performances in environment simulating Proton Exchange Membrane Fuel Cell (PEMFC). Compared with single carbon coating, GO-PTFE surface had more C==O functional groups. At the same time, the induction effect of F on the surface of polytetrafluoroethylene and oxygen atom electron cloud containing oxygen functional groups could obviously improve the adhesion of the coating. Corrosion current density and contact angle of the coating impregnated with 5 wt.% PTFE + 3 g/L GO were 0.008 μA/cm2 and 103.6°, respectively. At the same time, the constant current polarization test (0.6 V and –0.1 V) showed that the corrosion current density of the coating was less than 1 μA/cm2. Therefore, the Titanium-based bipolar plates prepared by impregnating GO and PTFE with carbon coatings shows great potential of application in the bipolar plate of PEMFC. |
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