不锈钢表面聚苯胺纳米纤维/改性氧化石墨烯/水性环氧复合涂层的制备与防护性能研究

doi:10.11902/1005.4537.2020.271

中国腐蚀与防护学报

2022, Vol. 42

Issue (1): 156-162 DOI: 10.11902/1005.4537.2020.271

研究报告

本期目录 | 过刊浏览

不锈钢表面聚苯胺纳米纤维/改性氧化石墨烯/水性环氧复合涂层的制备与防护性能研究

李建永¹, 代殿宇², 钱程², 刁书磊¹, 刘金山¹, 路通鑫¹, 孙勇¹, 肖凤娟²(

)

^1.石家庄市易达恒联路桥材料有限公司石家庄 050000
^2.石家庄铁道大学材料科学与工程学院河北省交通工程与环境协同发展新材料重点实验室石家庄 050043

Corrosion Behavior of PANI Nanofiber/Modified GO/Waterborne Epoxy Composite Coating on Stainless Steel

LI Jianyong¹, DAI Dianyu², QIAN Chen², DIAO Shulei¹, LIU Jinshan¹, LU Tongxin¹, SUN Yong¹, XIAO Fengjuan²(

)

^1.Shijiazhuang Yida Henglian Road and Bridge Materials Co. Ltd. , Shijiazhuang 050000, China
^2.School of Material Scinece and Engineering of Shijiazhuang Tiedao University, Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment, Shijiazhuang 050043, China

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摘要:

在氧化石墨烯纳米片 (GO) 改性的基础上，于非盐酸介质中采用原位共聚法合成了聚苯胺纳米纤维/改性氧化石墨烯复合材料 (PANI-F/CTGO)，将其作为防腐增效组分引入到水性环氧聚合物乳液 (WEP) 中构建复合涂料。采用电化学方法和盐雾实验研究了涂料在加速腐蚀条件下对不锈钢的腐蚀防护作用，对腐蚀产物结构进行了分析。复合材料中PANI-F与CTGO的化学键接提高了PANI-F/CTGO在环氧乳液中的分散性和相容性。非盐酸介质条件下制备的PANI纳米纤维没有腐蚀介质盐酸的引入，在涂层中能发挥出更好的耐蚀性；PANI-F/CTGO /WEP涂层具有较高的开路电位 (OCP) 值和阻抗模，耐盐雾时间达到720 h，显示了优异的防腐性能，这主要是PANI-F/CTGO的主动钝化与物理阻隔协同作用的结果。

关键词 ：非盐酸法原位聚合, PANI纳米纤维, 改性GO纳米片, 水性环氧复合涂层, 协同作用

Abstract：

Composite of polyaniline nanofiber/modified graphene oxide (PANI-F/CTGO) was synthesized by in-situ copolymerization in a non-hydrochloric acid medium. PANI-F/CTGO was introduced into waterborne epoxy polymer emulsion (WEP) as an anti-corrosion component to form composite coatings. The anticorrosion effect of the composite coating on stainless steel was assessed by means of salt spray test, electrochemical method, Fourier transform infrared spectroscope, SEM and XRD. Results show that the chemical bonding between PANI-F and CTGO improved the dispersion and compatibility of PANI-F/CTGO in epoxy emulsion. PANI nanofibers prepared in non-hydrochloric acid medium is conducive to better corrosion resistance of the coating due to that there is no corrosive HCl was involved into the prepared coating. PANI-F/CTGO/WEP coatings showed high open circuit potential and impedance modulus in 3.5%NaCl solution after salt spray test for 240 h, indicating their excellent corrosion protection performance. Meanwhile, the mechanism of synergism of active passivation and physical barrier of PANI-F/CTGO was revealed.

Key words： non-hydrochloric acid copolymerization PANI nanofiber modified GO nanosheet waterborne epoxy composite coating adsorption and active passivation

收稿日期: 2020-12-23

ZTFLH:

TG172

基金资助:河北省重点研发计划(17273702D);河北省建设科技计划(2016210)

通讯作者: 肖凤娟 E-mail: fengjuanxiao@stdu.edu.cn

Corresponding author: XIAO Fengjuan E-mail: fengjuanxiao@stdu.edu.cn

作者简介: 李建永，男，1987年生，硕士生，工程师

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引用本文:

李建永, 代殿宇, 钱程, 刁书磊, 刘金山, 路通鑫, 孙勇, 肖凤娟. 不锈钢表面聚苯胺纳米纤维/改性氧化石墨烯/水性环氧复合涂层的制备与防护性能研究[J]. 中国腐蚀与防护学报, 2022, 42(1): 156-162.
Jianyong LI, Dianyu DAI, Chen QIAN, Shulei DIAO, Jinshan LIU, Tongxin LU, Yong SUN, Fengjuan XIAO. Corrosion Behavior of PANI Nanofiber/Modified GO/Waterborne Epoxy Composite Coating on Stainless Steel. Journal of Chinese Society for Corrosion and protection, 2022, 42(1): 156-162.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.271 或 https://www.jcscp.org/CN/Y2022/V42/I1/156

图1 不同涂层SEM形貌及断面形貌

图2 不同涂层XRD谱和FT-IR谱

图3 不同涂层在3.5%NaCl溶液中浸泡20 d后OCP值的变化

图4 不同涂层在3.5%NaCl溶液中的Tafel极化曲线

表1 不同涂层极化曲线拟合的电化学参数

图5 不同涂层在3.5%NaCl溶液中浸泡48 d后的电化学阻抗

图6 各种涂层盐雾试验720 h后的表面腐蚀状态

图7 涂层下腐蚀产物的XRD图

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