Corrosion protection properties of polypyrrole electropolymerized onto steel in the presence of salicylate

被引：46
作者：
Gonzalez, Maria B. [1 ]
Saidman, Silvana B. [1 ]
机构：
[1] Univ Nacl Sur, Inst Ingn Electroquim & Corros INIEC, Dept Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina
来源：
PROGRESS IN ORGANIC COATINGS | 2012年 / 75卷 / 03期
关键词：
Polypyrrole; Microtubes; Salicylate; Corrosion protection; Open circuit-potential; Electrochemical impedance spectroscopy; ELECTROCHEMICAL-BEHAVIOR; POLYANILINE COATINGS; MILD-STEEL; ELECTRODE; POLYMERS; PYRROLE; IRON;
D O I：
10.1016/j.porgcoat.2012.04.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The corrosion performance of a polypyrrole coating constituted by hollow rectangular microtubes was monitored in chloride solutions using open circuit potential measurements, potentiostatic polarization and electrochemical impedance spectroscopy. The coating was electrosynthesized onto 316 L stainless steel from a salicylate solution and it provided a very good corrosion resistance to the substrate. It was found that polypyrrole films with granular morphology electrodeposited from a salicylate solution with lower concentration behave better in terms of protective behavior. In order to improve the corrosion protection imparted by the polypyrrole coating formed by the microtubes a system of two layers was electrodeposited, the first one consisted of polypyrrole with a granular morphology and the second one, on the top, was constituted by the microtubes. This bilayered system exhibited an excellent protective behavior during considerably long immersion time. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：178 / 183
页数：6
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