- Tytuł:
- Electrochemical Corrosion Evaluation of Copper-Alloyed Ductile Cast Irons
- Autorzy:
-
Brito, P.
Pereira, W.
Santos, W.
Gomes, H. - Powiązania:
- https://bibliotekanauki.pl/articles/946870.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
electrochemical corrosion
corrosion
environment protection
metallography
ductile iron
copper
korozja elektrochemiczna
korozja
ochrona środowiska
metalografia
żeliwo sferoidalne
miedź - Opis:
- In the present work, different Cu-alloyed model ductile irons with ferritic (0%Cu-0.09%Mn), mixed ferritic-pearlitic (0.38%Cu-0.40%Mn) and pearlitic (0.69%Cu-0.63%Mn) microstructure were produced and analyzed in terms of their electrochemical corrosion behavior in a 3.5wt.%NaCl aqueous solution containing naturally dissolved oxygen at room temperature (25°C). The remaining elements such as Si and Mg were kept at balanced levels in an attempt to minimize variations in graphite size and distribution among different samples. The corrosion resistance was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization. Microstructure analysis of the cast alloys confirmed similarity in the graphite morphology among the different cast samples and the expected variations in the metallic matrix. In the absence of passivation, it was found that the addition of copper led to an increase in corrosion resistance, which could be attested by higher values polarization resistance and corrosion potential.
- Źródło:
-
Archives of Foundry Engineering; 2020, 20, 2; 26-30
1897-3310
2299-2944 - Pojawia się w:
- Archives of Foundry Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł