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

被引：64

作者：

Zhu, Qingsong ^{[1
,2
]}

Li, En ^{[1
]}

Liu, Xianhu ^{[1
]}

Song, Weiqiang ^{[2
]}

Zhao, Mingyang ^{[2
]}

Zi, Lisen ^{[2
]}

Wang, Xinchao ^{[2
]}

Liu, Chuntai ^{[1
]}

机构：

[1] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Key Lab Adv Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Peoples R China

[2] Henan Univ Technol, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2020年 / 130卷

关键词：

Polypyrrole functionalized graphene; Zinc phosphate; Synergistic effect; Passivation function; Corrosion protection; CORROSION PROTECTION; MECHANICAL-PROPERTIES; COMPOSITES; RESISTANCE; NANOSHEETS; NANOCOMPOSITE; NANOPARTICLES; STEEL; GO;

D O I：

10.1016/j.compositesa.2019.105752

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

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