六方氮化硼掺杂水性环氧树脂耐腐蚀性能的研究

doi:10.11902/1005.4537.2016.145

中国腐蚀与防护学报

2016, Vol. 36

Issue (6): 566-572 DOI: 10.11902/1005.4537.2016.145

研究报告

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六方氮化硼掺杂水性环氧树脂耐腐蚀性能的研究

崔明君^1,²,任思明^2,³,张广安¹,刘栓³,赵海超³,王立平³,薛群基^1,³(

)

1. 中国科学院兰州化学物理研究所固体润滑国家重点实验室兰州 730000
2. 中国科学院大学北京 100039
3. 中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室宁波 315201

Corrosion Performance of Hexagonal Boron Nitride Doped Waterborne Epoxy Coating

Mingjun CUI^1,²,Siming REN^2,³,Guang'an ZHANG¹,Shuan LIU³,Haichao ZHAO³,Liping WANG³,Qunji XUE^1,³(

)

1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Lanzhou 730000, China
2. University of Chinese Academy of Sciences, Beijing 100039, China
3. Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

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摘要:

通过超声分散方法将六方氮化硼 (h-BN) 纳米片均匀分散于水中,同时利用高速搅拌将超声分散均匀的h-BN分散液与双组分水性环氧树脂搅拌均匀,并涂于电极表面,固化成膜。采用透射电子显微镜 (TEM)、扫描探针显微镜 (SPM) 和扫描电镜 (SEM) 考察h-BN在水溶液和水性环氧树脂中的分散情况。通过电化学阻抗谱、开路电位和极化曲线测试研究了掺杂不同含量h-BN对水性环氧树脂在3.5%(质量分数)NaCl溶液中的耐蚀性。结果表明：h-BN在水溶液中大约以相对较薄的多层存在,这将有利于其形成致密的物理隔绝层,延缓了腐蚀介质在环氧涂层中的扩散,改善其对基底的防护性能。其中,相对于纯水性环氧树脂涂层来说,掺杂2%h-BN的复合涂层表现出极高的阻抗模值和极低的腐蚀电流密度,对基底具有最优的防护性能。

关键词 ：水性环氧树脂, 六方氮化硼, 电化学测试, 耐腐蚀性

Abstract：

Hexagonal boron nitride doped waterborne epoxy coating was prepared by incorporating the water dispersed h-BN into the waterborne epoxy resin with a high speed stirring. The dispersity of h-BN in water was characterized by transmission electron microscopy, scanning probe microscopy and scanning electron microscopy. The anticorrosion performance of the waterborne epoxy coating doped with different among of h-BN was investigated by means of electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) and potentiodynamic polarization measurement. The results indicated that h-BN existed within relative thin multilayer in the water, which was beneficial to the formation of dense physical barrier composited of h-BN, thus slowing down the diffusion rate of corrosive medium in the coating and improving their anticorrosion performance. Meanwhile, in comparison with the pure epoxy coating, the epoxy coating with 2%h-BN exhibited extremely high impedance modulus and low corrosion current density, indicating its excellent corrosion performance.

Key words： waterborne epoxy resin hexagonal boron nitride electrochemical measurement anticorrosion performance

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	崔明君
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	王立平
	薛群基
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引用本文:

崔明君,任思明,张广安,刘栓,赵海超,王立平,薛群基. 六方氮化硼掺杂水性环氧树脂耐腐蚀性能的研究[J]. 中国腐蚀与防护学报, 2016, 36(6): 566-572.
Mingjun CUI, Siming REN, Guang'an ZHANG, Shuan LIU, Haichao ZHAO, Liping WANG, Qunji XUE. Corrosion Performance of Hexagonal Boron Nitride Doped Waterborne Epoxy Coating. Journal of Chinese Society for Corrosion and protection, 2016, 36(6): 566-572.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.145 或 https://www.jcscp.org/CN/Y2016/V36/I6/566

图1 h-BN在水溶液中超声分散后的TEM和SPM像

图2 BN-EP复合涂层的断面及表面形貌

图3 h-BN、水性环氧树脂涂层和BN-EP复合涂层的XRD谱

图4 4种掺杂不同h-BN/EP涂层的接触角

图5 EP, 0.5%BN-EP, 1.0%BN-EP和2.0%BN-EP涂层在3.5%NaCl溶液中浸泡不同时间的EIS谱图

图6 等效电路图

图7 h-BN/环氧树脂涂层在3.5%NaCl溶液中浸泡不同时间的Rcoat

图8 EP, 0.5%BN-EP, 1.0%BN-EP和2.0%BN-EP涂层的开路电位随浸泡时间的变化曲线

表1 h-BN环氧树脂涂层在3.5%NaCl溶液中浸泡20 d后的电化学腐蚀参数

图9 EP, 0.5%BN-EP, 1.0%BN-EP和2.0%BN-EP涂层在3.5%NaCl溶液中浸泡20 d后的动电位极化曲线

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