- Tytuł:
- Effect of Na3VO4 Inhibitor on the Corrosion Resistance of Al2Cu Intermetallic Phase in H3PO4 Aqueous Solution
- Autorzy:
- Kwolek, P.
- Powiązania:
- https://bibliotekanauki.pl/articles/354857.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
intermetallic phase
selective corrosion
orthophosphoric acid
electrochemical impedance spectroscopy
sodium orthovanadate - Opis:
- 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.
- Źródło:
-
Archives of Metallurgy and Materials; 2020, 65, 1; 175-183
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł