Application Progress of Polyaniline and Its Derivatives in the Metallic Protection

Abstract

The molecule structure, properties and the protection mechanism of polyaniline (PANI) are reviewed. The protection mechanism of polyaniline may be ascribed to its barrier, passivation and high oxidation potentials. The reversible oxidation state changes of PANI between reductions, oxidation states may be helpful to metallic passivation. The metallic passivation facilitated by PANI can induce a dense passive oxide layer on the surface of the metal which prevents the metal from further corrosion. And polyaniline can increase the oxidation potential and decrease the dissolution rate of the metal by oxidizing itself. So, polyaniline can be used as the corrosion inhibitor, coating and the composite coating additive to protect the metal from erosion. The progress of polyaniline and its derivatives in the corrosion protective field is discussed and what needs to be done more deeply concerning polyaniline is proposed.

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	Articles by authors
	Cao Yu
	Zhang Hairui
	Wang Jixiao

Keywords： polyaniline； coating； anticorrosion

Received 2014-05-14;

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Cao Yu, Zhang Hairui, Wang Jixiao.Application Progress of Polyaniline and Its Derivatives in the Metallic Protection[J] Chemcial Industry and Engineering, 2016,V33(4): 79-84

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