Synergistic effect of polypyrrole functionalized graphene oxide and zinc phosphate for enhanced anticorrosion performance of epoxy coatings

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2020-03-01 DOI:10.1016/j.compositesa.2019.105752

Qingsong Zhu , En Li , Xianhu Liu , Weiqiang Song , Mingyang Zhao , Lisen Zi , Xinchao Wang , Chuntai Liu

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引用次数: 44

Abstract

A promising novel composite coating based on compound pigment of zinc phosphate and polypyrrole (PPy) functionalized graphene (ZGP) was reported for carbon steel in 3.5 wt% NaCl solution. Two ratios of PPy functionalized graphene oxide (GO-PPy) nanocomposites were prepared by in-situ polymerization of pyrrol (Py) on the surface of graphene oxide (GO). PPy film deposited on the surface of graphene oxide guaranteed excellent dispersion in the coating owing to hydrophilic groups. Embedding a small amount of ZGP-2 composite pigment (m_Py/m_GO = 2:1) into the waterborne epoxy coating significantly improved corrosion protection of the prepared composite coating. The corrosion protection mechanism of the desirable coating was attributed to the synergistic protection of impermeable GO-PPy nanosheets and passivation function of zinc phosphate, which was proved by the identification of corrosion products. Therefore, this work may provide a new direction for further study on compound pigments composed of functional graphene nanomaterials and inorganic salt inhibitors.

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聚吡咯功能化氧化石墨烯与磷酸锌对环氧涂料防腐性能的协同作用

在3.5 wt% NaCl溶液中制备了一种以磷酸锌和聚吡咯(PPy)功能化石墨烯(ZGP)复合颜料为基础的碳钢复合涂层。通过在氧化石墨烯(GO)表面原位聚合吡咯(Py)，制备了两种比例的聚吡咯功能化氧化石墨烯(GO-PPy)纳米复合材料。由于亲水性基团的存在，沉积在氧化石墨烯表面的聚吡啶薄膜保证了涂层的良好分散性。将少量的ZGP-2复合颜料(mPy/mGO = 2:1)包埋在水性环氧涂料中，制备的复合涂料的防腐性能显著提高。通过对腐蚀产物的鉴定，证明了理想涂层的防腐机理是由于不透水的GO-PPy纳米片的协同保护和磷酸锌的钝化作用。因此，本工作可能为进一步研究功能石墨烯纳米材料与无机盐抑制剂组成的复合颜料提供新的方向。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.