Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
STUDY OF THE EFFECT OF A POLYPYRROLE COATING OBTAINED BY ELECTROPOLYMERIZATION ON THE CORROSION BEHAVIOR OF ASTM F1586 SURGICAL STAINLESS STEEL
Submission Author:
Camila Nascimento , SP , Brazil
Presenter: Camila Nascimento
doi://10.26678/ABCM.COBEF2017.COF2017-0097
Abstract
STUDY OF THE EFFECT OF A POLYPYRROLE COATING OBTAINED BY ELECTROPOLYMERIZATION ON THE CORROSION BEHAVIOR OF ASTM F1586 SURGICAL STAINLESS STEEL Conductor polymeric films can act as anodic inhibitors, accelerating and stabilizing the formation of protective oxide films on metallic materials. Polypyrrole is a conducting polymer with good chemical stability, wide range of electrical conductivity, low cost and simple synthesis. In the present work, a polymeric polypyrrole coating was deposited by electropolymerization on the surface of a ASTM F1586 surgical stainless steel. The objective was to investigate the effect of the polypyrrole layer on the corrosion behavior of the ASTM F1586 steel. The caracterization of the electrochemical behavior was made by electrochemical impedance spectroscopy and potentiodynamic polarization. The tests were conducted on PBS (phosphate buffered solution) at 37ºC. The morphology of the layer was evaluated by scanning electron microscopy and surface roughness was analysed by confocal laser scanning microscopy. The results showed the formation of a homogeneous film. The EIS tests indicated electrolyte penetration through the polypyrrole layer. However, the corrosion current density was decreased when compared to the bare substrate.
Keywords
surgical stainless steel, polypyrrole coating, conducting polymer film, corrosion
