Abstract
The present study aims at to study the effect of Mg variation on corrosion behavior of Zn-5Al-xMg (where x = 1.5 and 4.5 wt.%) hot-dip coating. The hot-dip Zn-5Al-xMg coating on steel substrate was carried out using Hot-dip process simulator (HDPS). Microstructure of the Zn-5Al-xMg coating was characterized using scanning electron microscope and x-ray diffraction. Micro-harness of the Zn-5Al-4.5Mg coating has been found to be ~ 3 times higher than that of galvanized coating. The corrosion behavior of the coatings was studied using dynamic polarization and electrochemical impedance spectroscopy (EIS) techniques in 3.5% NaCl solution as well as salt spray test (SST) in 5% NaCl solution. Zn-5Al-4.5Mg coating has exhibited two times higher corrosion resistance as compared to that of Zn-5Al-1.5Mg coating and 10 times higher corrosion resistance than conventional galvanized coating. Mechanism of corrosion has been analysed and discussed. The spot weldability of Zn-5Al-xMg coated steels has been found to be comparable to that of conventional galvanized (GI) steel sheets.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
