From Waste to Valuable Resource: Lignin as a Sustainable Anti-Corrosion Coating

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-12-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
454
Series
Coatings, Volume 8, issue 12
Abstract
In this study, a waste of biorefinery—lignin—is investigated as an anticorrosion coating on stainless steel. Corrosion behavior of two lignin types (hardwood beech and softwood spruce) was studied by electrochemical measurements (linear sweep voltammetry, open circuit potential, potentiostatic polarization, cyclic potentiodynamic polarization, and electrochemical impedance measurements) during exposure to simulated body fluid (SBF) or phosphate buffer (PBS). Results from linear sweep voltammetry of lignin-coated samples, in particular, demonstrated a reduction in corrosion current density between 1 and 3 orders of magnitude cf. blank stainless steel. Furthermore, results from cross cut adhesion tests on lignin-coated samples demonstrated that the best possible adhesion (grade 0) of ISO 2409 standard was achieved for the investigated novel coatings. Such findings suggest that lignin materials could transform the field of organic coatings towards more sustainable alternatives by replacing non-renewable polymer coatings.
Description
Keywords
Stainless steel, Polymer coatings, Anodic/cathodic protection, Cyclic voltammetry, Infrared (IR) spectroscopy
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Citation
Dastpak, A, Yliniemi, K, Cecilio de Oliveira Monteiro, M, Höhn, S, Virtanen, S, Lundström, M & Wilson, B P 2018, ' From Waste to Valuable Resource: Lignin as a Sustainable Anti-Corrosion Coating ', Coatings, vol. 8, no. 12, 454 . https://doi.org/10.3390/coatings8120454