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A sustainable two-layer lignin-anodized composite coating for the corrosion protection of high-strength low-alloy steel

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

25 Sitaatiot (Scopus)
148 Lataukset (Pure)

Abstrakti

In this study, plasticized kraft lignin was used to prepare anti-corrosive coatings on steel, which was galvanostatically anodized (80 °C, 25 wt.% NaOH) by utilizing three different current density values (24, 50 and 120 mA/cm2). It was shown that the anodization affects not only the properties of anodic coatings but also their interaction with lignin coatings. A combination of pull-off adhesion measurements with linear sweep voltammetry (LSV) demonstrated an enhanced adhesion strength of plasticized lignin coatings (4.32 MPa on anodized surface vs. 2.38 MPa on bare steel) and decreased corrosion current density from 15 μA/cm2 (bare steel) up to ca. 0.5 μA/cm2 for anodized and lignin coated steel.

AlkuperäiskieliEnglanti
Artikkeli105866
Sivumäärä9
JulkaisuProgress in Organic Coatings
Vuosikerta148
DOI - pysyväislinkit
TilaJulkaistu - marrask. 2020
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

This research was funded by Technology Industries of Finland/Jane and Aatos Erkko Foundations, Academy of Finland “ Future Makers: Biorefinery Side Stream Materials for Advanced Biopolymer Materials (BioPolyMet) ” and Academy of Finland (NoWASTE, No. 297962 ). Furthermore, this work utilized facilities provided by the RawMatTERS Finland Infrastructure (RAMI), supported by the Academy of Finland, as well as OtaNano Infrastructure at Aalto University. We also are grateful for the support by the Finn CERES Materials Bioeconomy Ecosystem. Additionally, special thanks to Esa Virolainen (SSAB Europe Oy) for providing steel sheets, and Michal Trebala for conducting nanomechanical analysis of the coatings of this study.

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