resumo
PEO coatings, aside from their reasonable corrosion protection, also feature a porous microstructure that can serve as a repository for corrosion inhibitors. This study presents and investigates the high corrosion inhibition effect of sodium salt of decylphosphonate (DP) when incorporated into PEO coating on a magnesium substrate. The interaction of DP with both bare and PEO-coated magnesium substrates was studied to understand its corrosion inhibition mechanism. Additionally, a strategy to enhance the active anti-corrosion ability of the DPcontaining system was suggested and examined. The findings provide new insights into the potential of surfactants as corrosion inhibitors for magnesium alloys.
palavras-chave
PLASMA ELECTROLYTIC OXIDATION; PROBE FORCE MICROSCOPY; SELF-ASSEMBLED MONOLAYERS; MAGNESIUM ALLOY; COATINGS; ACID; MECHANISM; PROTECTION; AZ31; RESISTANCE
categoria
Materials Science; Metallurgy & Metallurgical Engineering
autores
Vaghefinazari, B; Lamaka, SV; Gazenbiller, E; Yasakau, K; Blawert, C; Serdechnova, M; Scharnagl, N; Wieland, DCF; Zheludkevich, ML
nossos autores
Mikhail Zheludkevich
Investigador Principal ConvidadoGrupos
Projectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
The authors would like to acknowledge the technical support from Mr. Ulrich Burmester, Mr. Volker Heitmann, Ms. Petra Fisher, and Mr. Gert Wiese. The author acknowledges Dr. Maryam Radjabian and Mr. Joachim Koll from the institute of Membrane Research at Helmholtz Zentrum Hereon for their support during contact angle measurements. The authors would like to thank Deutsches Elektronen Synchrotron (DESY, PETRA III, Hamburg, Germany) for accepting the proposal I_20211343 (P.03 end-station) for carrying out the phase mapping of the coatings cross-sections. KY acknowledges the Portuguese Foundation for Science and Technology for the researcher grant (2021.00842. CEE-CIND) . Part of this work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) .