Selective Corrosion of Al2Cu Intermetallic Phase in Orthophosphoric Acid Aqueous Solutions

• Autorzy: Kwolek P. , Gradzik A. , Szeliga D. , Kościelniak B.

Identyfikatory

DOI

10.24425/amm.2019.130084

• Języki publikacji: EN

Abstrakty

EN

Al₂Cu phase has been obtained by melting pure metals in the electric arc furnace. It has been found that the intermetallic phase undergoes selective corrosion in the H₃PO₄ aqueous solutions. Aluminium is dissolved, the surface becomes porous and enriched with copper. The corrosion rate equals to 371 ±17 g∙m^-2∙day^-1 (aerated solution) and 284 ± 9 g∙m^-2∙day^-1 (deaerated solution). The surface of Al₂Cu phase after selective corrosion was characterised by using electrochemical impedance spectroscopy. It was found that the surface area of the specimens increases with temperature due to higher corrosion rate and is between 2137 and 3896 cm².

Słowa kluczowe

EN

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

• 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: 2019
• Tom: Vol. 64, iss. 4
• Strony: 1223--1229
• Opis fizyczny: Bibliogr. 13 poz., fot., rys., tab., wzory

Twórcy

autor

Kwolek P.

• Rzeszow University of Technology, Department of Materials Science, 12 Powstańców Warszawy Av, 35-959 Rzeszów, Poland

autor

Gradzik A.

• Rzeszow University of Technology, Department of Materials Science, 12 Powstańców Warszawy Av, 35-959 Rzeszów, Poland

autor

Szeliga D.

• Rzeszow University of Technology, Department of Materials Science, 12 Powstańców Warszawy Av, 35-959 Rzeszów, Poland

autor

Kościelniak B.

• Rzeszow University of Technology, Department of Materials Science, 12 Powstańców Warszawy Av, 35-959 Rzeszów, Poland

Bibliografia

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Uwagi

EN

1. The financial support from the National Science Centre, Poland, grant no 2016/23/D/ST5/01343 is acknowledged. Authors also acknowledge Mr Kamil Dychtoń and Andrzej Obłój for their help in conducting the electrochemical research and Dr Maciej Pytel for his assistance in analysis of the chemical composition of the solutions.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).