原位聚合聚苯胺改性NiFe-LDH复合涂层的防护性能研究

doi:10.11902/1005.4537.2022.099

中国腐蚀与防护学报

2023, Vol. 43

Issue (2): 312-320 CSTR: 32134.14.1005.4537.2022.099 DOI: 10.11902/1005.4537.2022.099

中国腐蚀与防护学报编委、青年编委专栏

本期目录 | 过刊浏览

原位聚合聚苯胺改性NiFe-LDH复合涂层的防护性能研究

蒋芳芳¹, 云虹¹(

), 彭莉², 张依豪¹, 李卫顺¹, 代文静¹, 王保峰¹, 徐群杰¹

^1.上海市电力材料防护与新材料重点实验室上海热交换系统节能工程技术研究中心上海电力大学环境与化学工程学院上海 200090
^2.上海海关机电产品检测技术中心上海 200135

Protective Performance of NiFe-LDH Composite Coatings Modified by insitu Polymerized Polyaniline

JIANG Fangfang¹, YUN Hong¹(

), PENG Li², ZHANG Yihao¹, LI Weishun¹, DAI Wenjing¹, WANG Baofeng¹, XU Qunjie¹

^1.Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai Engineering Research Center of Heat-exchange System and Energy Saving, Shanghai University of Electric Power, College of Environmental and Chemical Engineering, Shanghai 200090, China
^2.Technical Center for Mechanical and Electrical Product Inspection and Testing of Shanghai Customs, Shanghai 200135, China

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摘要:

采用水热法结合原位化学氧化法在304不锈钢表面制备了不同种类NiFe-LDH (层状双氢氧化物) /聚苯胺 (PANI) 复合涂层。利用SEM、EDS能谱分析、XRD、FT-IR和XPS，对不同LDH的表面形貌和结构进行分析。采用极化曲线和电化学阻抗谱研究了涂层对基底的防蚀性能，并对其耐腐蚀机理进行探讨。结果表明，添加Fe(NO₃)₃得到层状结构的LDH，采用PANI改性可进一步优化LDH的表面结构。PANI和LDH之间存在化学键的结合，二者协同作用提升复合涂层的综合性能。在168 h浸泡期间，NiFe-LDH/PANI复合涂层在1 mol/L H₂SO₄溶液中具有良好的化学稳定性，为304不锈钢提供优良的物理屏蔽和阳极氧化保护作用。

关键词 ：聚苯胺, 层状双氢氧化物, 耐蚀性能, 304 不锈钢

Abstract：

Different kinds of NiFe-LDH/polyaniline (PANI) composite coatings were prepared on the surface of 304 stainless steel by hydrothermal method coupled with in-situ polymerization method. The surface morphology and structure of the prepared LDH coatings were investigated by scanning electron microscope (SEM), energy dispersive spectroscope (EDS), X-ray diffractometer (XRD), Fourier transform infrared spectroscope (FT-IR) and X-ray photoelectron spectroscope (XPS). While the anti-corrosive performance of the coatings was characterized by means of polarization curve measurement and electrochemical impedance spectroscope, and the corrosion mechanism was discussed. The results showed that the composite LDH coatings with lamellar structure may be acquired by adding Fe(NO₃)₃. Then, its surface structure was further optimized by modification with PANI. There was a chemical bond between PANI and LDH, and the synergistic effect of them could improve the comprehensive performance of the composite coating. During 168 h immersion in 1 mol/L H₂SO₄ solution, NiFe-LDH/PANI composite coating exhibited good chemical stability, which implied that the coating could provide excellent physical shielding and anodic protection for 304 stainless steel.

Key words： polyaniline layered double hydroxide anti-corrosive 304 stainless steel

收稿日期: 2022-04-09 32134.14.1005.4537.2022.099

ZTFLH:

TB332

基金资助:国家自然科学基金(21972090);国家自然科学基金(22075173)

作者简介: 蒋芳芳，女，1996年生，硕士生

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引用本文:

蒋芳芳, 云虹, 彭莉, 张依豪, 李卫顺, 代文静, 王保峰, 徐群杰. 原位聚合聚苯胺改性NiFe-LDH复合涂层的防护性能研究[J]. 中国腐蚀与防护学报, 2023, 43(2): 312-320.
Fangfang JIANG, Hong YUN, Li PENG, Yihao ZHANG, Weishun LI, Wenjing DAI, Baofeng WANG, Qunjie XU. Protective Performance of NiFe-LDH Composite Coatings Modified by insitu Polymerized Polyaniline. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 312-320.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.099 或 https://www.jcscp.org/CN/Y2023/V43/I2/312

图1 304不锈钢上所制备涂层表面SEM图和相应EDS元素面扫描图

图2 304不锈钢表面所制备涂层的XRD谱图

图3 304不锈钢表面所制备涂层的FT-IR图

图4 304不锈钢表面不同涂层附着力测试后的光学形貌

图5 304不锈钢表面不同涂层在1 mol/L H2SO4溶液中的动电位极化曲线

图6 304不锈钢表面不同涂层在1 mol/L H2SO4溶液中的Nyquist图及等效电路

表1 304不锈钢表面不同涂层在1 mol/L H2SO4溶液中浸泡不同时间后的电化学阻抗谱拟合参数

图7 不同涂层在1 mol/L H2SO4溶液中浸泡不同时长的Nyquist图及等效电路图

图8 304不锈钢表面不同涂层的XPS谱图

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