Corrosion protection properties of polypyrrole coatings formed onto 316 L SS from a solution containing molybdate and salicylate-Reference-Cited by-同舟云学术

Corrosion protection properties of polypyrrole coatings formed onto 316 L SS from a solution containing molybdate and salicylate

Published:2022 Issue:11 Volume:87 Page:1297-1311
ISSN:0352-5139
Container-title:Journal of the Serbian Chemical Society
language:en
Short-container-title:JSCS

Author:

Ramos Camila¹^ORCID,González Maria¹^ORCID,Brugnoni Lorena²^ORCID,Saidman Silvana¹^ORCID

Affiliation:

1. Chemical Engineering Department, Institute of Electrochemical and Corrosion Engineering, National University of the South, CONICET, Bahía Blanca, Argentina

2. Department of Biology, Biochemistry and Pharmacy, Institute of Biological and Biomedical Sciences, National University of the South, CONICET, Bahía Blanca, Argentina

Abstract

The electrosynthesis of PPy films onto 316L stainless steel from nearly neutral and alkaline solutions containing molybdate and salicylate is reported. The corrosion behaviour of the coatings constituted by hollow rectangular microtubes was monitored in Ringer solution using open circuit potential measurements, polarization techniques and electrochemical impedance spectroscopy. The polymer formed in a solution of pH 8 was the most efficient in terms of corrosion protection. The coating significantly reduced the pitting corrosion of the substrate. The results were interpreted taking into consideration the polymer electroactivity, the galvanic interaction polypyrrole/substrate and the nature of dopants. Silver species were effectively immobilized onto the hollow rectangular-sectioned microtubes of PPy. The modified coatings demonstrated that they have a good bactericidal activity against Escherichia coli and they were also able to protect the substrate against corrosion in Ringer solution.

Publisher

National Library of Serbia

Subject

General Chemistry

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