2 results match your criteria: "Changwon National University Changwondaehak-ro Changwon 51140 South Korea junseoblee@changwon.ac.kr +82-55-261-7017 +82-55-213-3691.[Affiliation]"
Preferential dissolution behaviour of the austenite phase in Fe-27Cr-C high chromium cast iron.
RSC Adv
June 2023
School of Materials Science and Engineering, Changwon National University Changwondaehak-ro Changwon 51140 South Korea +82-55-261-7017 +82-55-213-3691.
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.
Passivation of precipitation-hardened UNS N07718 in a shallow sour aqueous solution.
RSC Adv
February 2023
School of Materials Science and Engineering, Changwon National University 51140 Changwondaehak-ro Changwon 51140 South Korea +82-55-261-7017 +82-55-213-3691.
Article Synopsis
- The study examined how the precipitation-hardened UNS N07718 alloy is passivated in a solution of 5 wt% NaCl and 0.5 wt% CHCOOH.
- Cyclic potentiodynamic polarisation showed that the alloy maintained a stable passive state without switching to a different behavior during testing, and the passive film improved in electrical resistivity over time.
- Analysis revealed that the passive film consisted of layers rich in chromium and iron, and changes in the film's composition were linked to the alloy's corrosion resistance in harsh conditions.