Corrosion and wear resistance behavior of nano-silica epoxy composite coatings

被引：84

作者：

Palraj, Sironmani ^{[1
]}

Selvaraj, Muthiah ^{[1
]}

Maruthan, Kuppaianpoosari ^{[1
]}

Rajagopal, Gopalakrishnan ^{[1
]}

机构：

[1] CSIR, Cent Electrochem Res Inst, Corros & Mat Protect Div, Karaikkudi 630006, Tamil Nadu, India

来源：

PROGRESS IN ORGANIC COATINGS | 2015年 / 81卷

关键词：

Coatings; Electron microscopy; Electrochemical techniques; Abrasion; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; TRIBOLOGICAL PERFORMANCE; GROWTH; SIZE;

D O I：

10.1016/j.porgcoat.2015.01.005

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Recent developments made in the synthesis of nano-materials have demonstrated their contribution in the field of protective coatings. Sol gel method is the simple and elegant technique for the preparation of nanosilica particles. The nano-silica composites were prepared by mixing the epoxy compounds and polyamide hardener and characterized by using X-ray powder diffraction (XRD), thermal analysis (TGA and DTA), FT-IR spectroscopic technique and SEM analysis. The size of the nano particles was confirmed by transmission electron microscopy (TEM). Mechanical properties of the nano-silica epoxy composites were determined by ASTM method. The wear index data of the nano-silica incorporated epoxy composite were found to be 32 mg/1000 cycles. Corrosion performance was evaluated by salt spray test and electrochemical impedance measurements. The nano-silica epoxy composite coatings withstood 720 h in salt spray test, whereas the micro silica coatings withstood up to 650 h. Electrochemical impedance spectroscopy results of the nano-silica epoxy composite coatings showed a resistance of 2.36 x 10(6) Omega cm(2) after 30 days of immersion in 3% NaCl solution, whereas micro silica incorporated coatings showed a resistance of 5.41 x 10(4) Omega cm(2) under similar conditions. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：132 / 139

页数：8

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