Effect of carbon addition on the passivity of hypoeutectic high chromium cast irons

The effect of adding C on the passivity of hypoeutectic high chromium cast iron (HCCI) was investigated in a pH 8.4 boric-borate buffer solution. The microstructure of HCCI is composed of austenite and carbide phases, whose fractions and chemical compositions are influenced by the amount of C added....

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Bibliographic Details
Published in:RSC advances 2022-12, Vol.13 (1), p.586-593
Main Authors: Lee, Jun-Seob, Lee, Jun-Hyeong, Oh, Jun-Seok, Kang, Sung, Baek, Seung-Hoon, Ahn, Jee Hyuk, Han, Seung Zeon, Lee, Je-Hyun
Format: Article
Language:English
Subjects:
Austenite
Buffer solutions
Carbides
Cast iron
Chemical composition
Chemistry
Chromium
Fractions
N-type semiconductors
P-type semiconductors
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Summary:The effect of adding C on the passivity of hypoeutectic high chromium cast iron (HCCI) was investigated in a pH 8.4 boric-borate buffer solution. The microstructure of HCCI is composed of austenite and carbide phases, whose fractions and chemical compositions are influenced by the amount of C added. Electrochemical and surface analyses revealed that the addition of C in the HCCI increased the defect densities in the n-type and p-type semiconductive oxide layers on the austenite and carbide phases, respectively. The effect of adding C on the passivity of hypoeutectic high chromium cast iron (HCCI) was investigated in a pH 8.4 boric-borate buffer solution.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra06902d