Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments

To understand the cut-edge corrosion behaviors of Zn-Al-Mg alloy-coated steel better, mechanistic studies with a Zn-MgZn2 eutectic specimen fabricated by a hot-pressing process were conducted using various electrochemical methods, such as the scanning vibrating electrode technique and galvanic corrosion measurements. The results showed that the MgZn2 phase dissolved preferentially with the galvanic current flowing from the phase to Zn. Mg/Zn...