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

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Camila A. Ramos
https://orcid.org/0000-0002-6723-7024
Maria Belen González
https://orcid.org/0000-0001-6187-7912
Lorena I. Brugnoni
https://orcid.org/0000-0002-3008-1388
Silvana B. Saidman
https://orcid.org/0000-0002-4692-3631

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.

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How to Cite
[1]
C. A. Ramos, M. B. González, L. I. Brugnoni, and S. B. Saidman, “Corrosion protection properties of polypyrrole coatings formed onto 316 L SS from a solution containing molybdate and salicylate: Scientific paper”, J. Serb. Chem. Soc., vol. 87, no. 11, pp. 1297–1311, Nov. 2022.
Section
Electrochemistry

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