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Corrosion protection of electrogalvanised steel by application of non-conducting polyaniline-silica particles
Transactions of the IMF ( IF 1.2 ) Pub Date : 2021-05-13 , DOI: 10.1080/00202967.2021.1911454
K. Kamburova 1 , N. Boshkova 1 , N. Boshkov 1 , Ts. Radeva 1 , G. Atanasova 2
Affiliation  

ABSTRACT

The authors have demonstrated that incorporation of poly(ethyleneimine) (PEI) coated polyaniline-silica (PANI-SiO2) particles into the zinc coating matrix improves the corrosion resistance of low carbon steel in a 5% NaCl solution compared to the bare zinc coating. The zinc and hybrid coatings were electrodeposited on a steel cathode surface at pH 5.5 when PANI manifests itself as non-conductive emeraldine base. Scanning electron microscopy showed that the hybrid coating consists of particle agglomerates in size 50–100 μm, mixed with smooth formations and smaller needle-like particles. The influence of PEI is suggested to cause the appearance of the smooth formations. The influence of PANI-SiO2 particles on the cathodic deposition and anodic dissolution has been checked with cyclic voltammetry. The protective properties of the coatings were characterised by potentiodynamic polarisation and polarisation resistance studies. X-ray diffraction and X-ray photoelectron spectroscopy were also applied to investigate the metallographic structure and chemical composition of the coatings.



中文翻译:

应用非导电聚苯胺-二氧化硅颗粒对电镀锌钢的腐蚀保护

摘要

作者已经证明,与裸锌涂层相比,将聚(乙烯亚胺)(PEI)涂覆的聚苯胺 - 二氧化硅(PANI-SiO 2)颗粒掺入锌涂层基质中可提高低碳钢在 5% NaCl 溶液中的耐腐蚀性. 当 PANI 表现为不导电的祖母绿基时,锌和混合涂层在 pH 值为 5.5 的钢阴极表面上电沉积。扫描电子显微镜显示混合涂层由大小为 50-100 μm 的颗粒团聚体组成,混合有光滑的结构和较小的针状颗粒。建议 PEI 的影响导致平滑地层的出现。PANI-SiO 2的影响阴极沉积和阳极溶解上的颗粒已经用循环伏安法检查过。通过动电位极化和极化电阻研究表征了涂层的保护性能。X射线衍射和X射线光电子能谱也被用于研究涂层的金相结构和化学成分。

更新日期:2021-07-13
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