AI Article Synopsis
- The study focused on how the austenite (γ) phase in high chromium cast irons (HCCIs) dissolves when immersed in a specific acidic solution, revealing that primary and eutectic γ phases dissolve at different voltage levels.
- Results showed that the primary γ phase predominantly dissolved within the first hour of immersion, while both primary and eutectic γ phases dissolved thereafter, but carbide phases remained unaffected.
- The research found that increasing carbon content in the HCCIs led to a higher corrosion rate, attributed to changes in the electrochemical potential differences between γ and carbide phases caused by the addition of carbon.
Article Abstract
Preferential dissolution behaviour of the austenite (γ) phase in Fe-27Cr-C high chromium cast irons (HCCIs) immersed in 0.1 mol dm HSO + 0.05 mol dm HCl was investigated. Potentiodynamic and potentiostatic polarisation revealed that the primary and eutectic γ phases dissolved preferentially at -0.35 and 0.00 V, respectively. The immersion of the HCCIs in the solution showed that the dissolution of the primary γ phase dominated for 1 h, while the primary and eutectic γ phases dissolved after 1 h. However, the carbide phases remained undissolved during the dissolution of the γ phases. Furthermore, the corrosion rate of the HCCIs increased with the increasing C content owing to the increase in the contact potential difference values of the γ and carbide phases. The change in electromotive force due to C addition was related to the accelerated corrosion rate of the γ phases.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10291255 | PMC |
| http://dx.doi.org/10.1039/d3ra01015e | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!