Abstract
• Powder topcoats were applied on top of MgRPs for the first time. • (MgRP-powder topcoat) coating system provided much longer corrosion protection time to Al substrate than the powder coat by itself. • MgRP as an under layer did not affect the application quality of powder topcoat and the final coating appearance. (Mg rich primer-powder topcoat) coating system was first developed and characterized in this research for the corrosion protection of Al alloys. Feasibility of using Mg rich primer (MgRP) as an under layer for powder topcoat was proved through evaluating thermal stability of MgRP, adhesion strength of the (MgRP-powder topcoat) coating systems, and cross-section images of the coating systems. In addition, corrosion protection effects of (MgRP-powder topcoat) coating system were evaluated by exposing samples to accelerated weathering test. Electrochemical impedance spectroscopy (EIS) and visual inspection were conducted during exposure. The results show that (MgRP-powder topcoat) coating systems provided much longer corrosion protection time to Al substrate than the powder topcoat alone. Moreover, gloss measurements indicated that for the coating systems tested in this research, using MgRP as an under layer does not affect the final coating appearance.
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.
