PPy/α-Fe2O3复合材料的合成及其耐蚀性
Synthesis and Anti-Corrosion Properties of PPy/α-Fe2O3 Composites
摘 要
采用原位化学氧化聚合法成功制备了耐蚀性优异的PPy/α-Fe2O3复合材料。采用X射线衍射（XRD）、傅里叶红外光谱仪（FTIR）和扫描电子显微镜（SEM）等手段对复合材料的物相和微观结构进行了表征，研究了柠檬酸浓度对复合材料形貌和结构的影响。采用复合材料对环氧树脂涂层进行改性，所得复合涂层的耐蚀性显著提升，其耐蚀性很大程度上受柠檬酸浓度的影响。当柠檬酸浓度为0.5 mol/L时，改性涂层的自腐蚀电位为-0.685 9 V（SCE），腐蚀电流密度为3.08×10-6 A/m2，交流阻抗最大，耐蚀性最佳。
复合涂料
腐蚀防护性能
PPy/α-Fe2O3
composite-coating
anti-corrosion property
Abstract
PPy/α-Fe2O3 composites with excellent corrosion resistance were successfully prepared by in-situ chemical oxidation polymerization. The phase and microstructure of the composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscpy (FTIR) and scanning electron microscopy (SEM). The effects of citric acid concentration on the morphology and structure of the composites were investigated. Epoxy resin coating was modified by the composite materials, and the corrosion protection performance of the composite coating was significantly improved, and the corrosion resistance was largely affected by the concentration of citric acid. When the concentration of citric acid was 0.5 mol/L, the self-corrosion potential of the modified coating was -0.685 9 V (SCE), and the corrosion current density was 3.08×10-6 A/m2. The AC impedance was the largest and the corrosion resistance was the best.
中图分类号 TG174.4 DOI 10.11973/fsyfh-201901003
所属栏目 试验研究
基金项目 国家自然科学基金（51272165；51672138）；四川省腐蚀与防护重点实验室资助项目（2014CL13）；四川理工学院人才科研基金（2014PY11）；四川理工学院研究生创新基金（y2016027）
收稿日期 2017/8/12
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引用该论文: ZOU Yanzhao,WANG Hong,GONG Min,LIU Chuan,LIN Guo. Synthesis and Anti-Corrosion Properties of PPy/α-Fe2O3 Composites[J]. Corrosion & Protection, 2019, 40(1): 13
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【5】朱日龙,李国希,刘晓阳. 聚吡咯的电化学合成及其对不锈钢的保护作用[J]. 中国腐蚀与防护学报,2008,28(1):7-10.
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【7】OMRANI A,ROSTAMI H,MINAEE R. Electrochemical synthesis of polypyrrole/polyhedral oligomeric silsesquioxane nanocomposite on copper for corrosion protection[J]. Progress in Organic Coatings,2016,90:331-338.
【8】HOSSEINI M G,SABOURI M,SHAHRABI T. Comparison of the corrosion protection of mild steel by polypyrrole-phosphate and polypyrrole-tungstenate coatings[J]. Journal of Applied Polymer Science,2010,110(5):2733-2741.
【9】JADHAV N,GELLING V J. Synthesis and characterization of micaceous iron oxide/polypyrrole composite pigments and their application for corrosion protection of cold-rolled steel[J]. Corrosion,2013,70(5):464-474.
【10】王慧龙,朱璐玮,姜文凤. 植酸盐掺杂聚吡咯/纳米SiO2/环氧树脂长效耐蚀涂层的制备及缓蚀性能[J]. 腐蚀与防护,2016,37(4):269-273.
【11】NASSAR M Y,AHMED I S,MOHAMED T Y,et al. A controlled,template-free,and hydrothermal synthesis route to sphere-like α-Fe2O3 nanostructures for textile dye removal[J]. Rsc Advances,2016,24(6):20001-20013.
【12】SELVARAJ M,PALRAJ S,MARUTHAN K,et al. Synthesis and characterization of polypyrrole composites for corrosion protection of steel[J]. Journal of Applied Polymer Science,2010,116(3):1524-1537.
【13】ARAVINDAN N,SANGARANARAYANAN M V. Influence of solvent composition on the anti-corrosion performance of copper-polypyrrole (Cu-PPy) coated 304 stainless steel[J]. Progress in Organic Coatings,2016,95:38-45.
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【15】LADAN M,WAN J B,KAZI S N,et al. Corrosion protection of AISI 1018 steel using co-doped TiO2/polypyrrole nanocomposites in 3.5% NaCl solution[J]. Materials Chemistry & Physics,2017,192:361-373.
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【18】柯强,陈松,刘松,等. 石墨烯片/聚吡咯复合材料的制备与防护性能[J]. 腐蚀与防护,2014,35(10):997-1001.
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