Work

Effect of cooling rate on corrosion resistance and behavior of micro-alloyed cast AZ91-Ca-Y alloy

Year: 2025

Type: article

Abstract: The effects of cooling rate during solidification on short- and long-term corrosion behaviors of micro-alloyed cast AZ91-Ca-Y alloys were investigated through weight loss, corrosion morphology observations, EIS, and SKPFM. As the cooling rate increased, the area fraction of the eutectic α and β phases acting as galvanic sources decreased, lowering the short-term corrosion rate. The long-term corrosion rate decreased due to enhanced β phase connectivity, preventing corrosion propagation. Increasing the cooling rate decreased the Zn molar ratio in the β phase, reducing the β phase volta potential. This reduction in the volta potential contributed to lowering the corrosion rate.

Source: Journal of Magnesium and Alloys

DOI: 10.1016/j.jma.2025.02.026

Authors: Hongxiu Liu, Jun-Ho Bae, Jae-Wook Kang, Jun-Seob Lee, Jae-Yeon Kim, Bong-Sun You

Institutions: Changwon National University, Korea Institute of Materials Science, Hyundai Steel (South Korea)

Language: English

Topic: Magnesium Alloys: Properties and Applications

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,500

Funder: Ministry of Trade, Industry and Energy