Abstract This study aims to introduce a series of eco-friendly anticorrosive nano composite pigments consist of CoWO4 (CoW) as a colorant and different silica sources including CaSiO3, rice husk ash and nano silica as an inexpensive matrix. The synthesized samples were characterized by XRD, FESEM-EDX, ICP-AES, UV–Vis-NIR diffuse reflectance spectroscopy, and CIE L*a*b* color scales. The new pigments comprising about 90 wt% of silica sources covered with a thin layer of CoW that is about 10 wt% of pigment. These pigments were used in epoxy based paint formulation and their corrosion efficiencies were investigated using electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The results showed that the color and anticorrosive properties of the nano composite pigments were significant differences with the changing of silica source.

中文翻译：

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在不同二氧化硅来源上使用 CoWO4 合成和表征新型纳米复合颜料：比较研究

摘要 本研究旨在介绍一系列环保型防腐纳米复合颜料，该颜料由 CoWO4 (CoW) 作为着色剂和不同的二氧化硅来源，包括 CaSiO3、稻壳灰和纳米二氧化硅作为廉价基质。合成的样品通过 XRD、FESEM-EDX、ICP-AES、UV-Vis-NIR 漫反射光谱和 CIE L*a*b* 色标进行表征。新颜料包含约 90 重量％的二氧化硅源，覆盖有约 10 重量％颜料的 CoW 薄层。这些颜料用于环氧基涂料配方，并使用电化学阻抗谱 (EIS) 在 3.5% NaCl 溶液中研究它们的腐蚀效率。结果表明，随着二氧化硅来源的变化，纳米复合颜料的颜色和防腐性能存在显着差异。