Effect of polypyrrole on the properties of conventional epoxy coatings

被引：17
作者：
Abhijit, S. [1 ]
Mahanwar, Prakash A. [1 ]
Bambole, V. A. [2 ]
机构：
[1] Inst Chem Technol, Dept Polymer & Surface Engn, Bombay, Maharashtra, India
[2] Univ Bombay, Dept Phys, Bombay 400098, Maharashtra, India
来源：
PIGMENT & RESIN TECHNOLOGY | 2013年 / 42卷 / 05期
关键词：
Conducting polymer; Polypyrrole; Anti-corrosive; Coating; Epoxy; Pigments; Coating processes; Polymers; CORROSION PROTECTION; POLYANILINE; CONDUCTIVITY; INHIBITION;
D O I：
10.1108/PRT-04-2011-0030
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Purpose - The aim of this paper is to conduct a real time evaluation of polypyrrole as an anti-corrosive pigment in epoxy polyamide coating. Design/methodology/approach - This study deals with synthesis of polypyrrole (PPy) by chemical oxidative polymerisation in laboratory conditions. The synthesised PPy was characterised by employing FT-IR, XRD, SEM and EDX analysis. Epoxy film of bisphenol type hardened with polyamide based curing agent was used as the binder. PPy was used as anti-corrosive pigment in concentrations varying from 0 to 5 wt% in the coating. In addition to anti-corrosive property, mechanical, chemical and weathering properties of the coating containing PPy were studied and compared with epoxy polyamide coating without PPy. Findings - The result obtained through various tests showed that the coating with 1 and 2% PPy exhibited excellent weathering resistance, mechanical properties and improved chemical resistance. Research limitations/implications - The anti-corrosion property of the coating can be tested by means of atmospheric exposure such as Florida test or by means of electrochemical impedance spectroscopy. Practical implications - The results find application in anti-corrosive paints for industrial application. Originality/value - This research paper presents the results of anti-corrosion behaviour of PPy in epoxy-polyamide coating. Based on this result, a highly effective anti-corrosive coating can be formulated by addition of small percentage of PPy in combination with other conventional pigments, thereby enhancing corrosion protection.
引用
收藏
页码：317 / 325
页数：9
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