Eco-friendly indigo carmine-loaded chitosan coatings for improved anti-corrosion protection of zinc substrates

Árpád Ferenc Szőke, Gabriella Stefánia Szabó, Z. Hórvölgyi, Emőke Albert, Luiza Gaina, Liana Maria Muresan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Chitosan (Chit) coatings were prepared on zinc and glass substrates by dip-coating method. The coatings were impregnated with a non-toxic compound, indigo carmine (IC). The novel, eco-friendly, IC-loaded chitosan coatings were characterized morpho-structurally, and their corrosion protection behavior was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The surface properties of the coated samples were evaluated by wettability measurements. The thickness of the native chitosan layers and the stability of the impregnated layers in terms of dye release on glass substrates were studied by UV–vis spectrophotometry. The good corrosion inhibiting efficiency of the coatings (>90%) was attributed to the ionic crosslinking of the positively charged Chit with negatively charged IC. The Chit-IC coatings can be successfully used as model systems for chitosan-based coatings incorporating ionic inhibitors and in less demanding applications, such as temporary protective coatings for metals, removable on demand by scrubbing with mild acidic solutions.

Original languageEnglish
Pages (from-to)63-72
Number of pages10
JournalCarbohydrate Polymers
Volume215
DOIs
Publication statusPublished - Jul 1 2019

Fingerprint

Indigo Carmine
Chitosan
Corrosion protection
Zinc
Coatings
Substrates
Temporary coatings
Glass
Potentiodynamic polarization
Spectrophotometry
Electrochemical impedance spectroscopy
Crosslinking
Surface properties
Wetting
Coloring Agents
Dyes
Metals
Corrosion

Keywords

  • Anticorrosive coatings
  • Chitosan
  • Indigo carmine
  • Zinc corrosion

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Eco-friendly indigo carmine-loaded chitosan coatings for improved anti-corrosion protection of zinc substrates. / Szőke, Árpád Ferenc; Szabó, Gabriella Stefánia; Hórvölgyi, Z.; Albert, Emőke; Gaina, Luiza; Muresan, Liana Maria.

In: Carbohydrate Polymers, Vol. 215, 01.07.2019, p. 63-72.

Research output: Contribution to journalArticle

Szőke, Árpád Ferenc ; Szabó, Gabriella Stefánia ; Hórvölgyi, Z. ; Albert, Emőke ; Gaina, Luiza ; Muresan, Liana Maria. / Eco-friendly indigo carmine-loaded chitosan coatings for improved anti-corrosion protection of zinc substrates. In: Carbohydrate Polymers. 2019 ; Vol. 215. pp. 63-72.
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