Effect of Na3VO4 Inhibitor on the Corrosion Resistance of Al2Cu Intermetallic Phase in H3PO4 Aqueous Solution

• Autorzy: Kwolek P.

Identyfikatory

DOI

10.24425/amm.2019.131112

• Języki publikacji: EN

Abstrakty

EN

Sodium orthovanadate was tested as a corrosion inhibitor of intermetallic Al₂Cu in 1 M H₃PO₄. The Al₂Cu–H₃PO₄–Na₃VO₄system was studied using the following methods: inductively coupled plasma optical emission spectrometry, scanning electron microscopy with energy dispersive x-ray spectroscopy, x-ray diffraction, electrochemical impedance spectroscopy, polarisation and open circuit potential. It was found that the corrosion rate decreased as the inhibitor concentration increased. The highest inhibition efficiency 99% was obtained when sodium orthovanadate initial concentration was equal to 100 mM, pH = 1.11, due to precipitation of a protective layer of insoluble salt, containing vanadium, phosphorus, sodium and oxygen, on the surface. At pH = 0.76 the protective layer was not formed and inhibition efficiency decreased to 76%. Selective corrosion of the intermetallic phase caused a significant increase of an electric double layer capacitance and decrease of a charge transfer resistance.

Słowa kluczowe

EN

intermetallic phase; selective corrosion; orthophosphoric acid; electrochemical impedance spectroscopy; sodium orthovanadate

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 1
• Strony: 175--183
• Opis fizyczny: Bibliogr. 25 poz., fot., rys., tab., wzory

Twórcy

autor

Kwolek P.

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautics, Department of Materials Science, 2 Wincentego Pola Str., 35-959 Rzeszów, Poland

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Uwagi

EN

1. The financial support from the National Science Centre, Poland, Grant No. 2016/23/D/ST5/01343 is gratefully acknowledged. The authors also gratefully acknowledge Dr. Dariusz Szeliga and Mr. Andrzej Gradzik for preparing the Al₂Cu intermetallic phase, Dr. Barbara Kościelniak for her help in microscopic analysis, and Mr. Kamil Dychtoń for his help in conducting the electrochemical research.

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).