|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection
||Design and Performance of REACH-compliant Coating Systems for Aerospace Applications
||Weilong Zhang, Mike A. Kryzman, George S Zafiris
|On-Site Speaker (Planned)
Current high performance multilayer coating systems (i.e. pretreatment + primer + topcoat) for aerospace applications center on the use of hexavalent chromium (Cr(VI)) in both the pretreatment and primer. Due to its toxicity and carcinogenicity, and regulations such as REACH, there is an urgent need to design REACH-compliant coating systems for aerospace applications.
The trivalent chromium process is considered the best all-around alternatives to chromate pretreatment. Both trivalent chromium pretreatments and non-chromate paint primers perform well when tested with chromated counterparts. However, when the two non-chromate coating layers are integrated into a REACH-compliant coating system, negative interactions occur that affect adhesion and corrosion performance. Therefore, a better understanding of failure mechanisms and design metrics are critical for REACH-compliant coating systems.
In this work, we will examine what properties of non-chromate pretreatments may drastically affect the performance of the coating system when integrated, and discuss the key design metrics for a better REACH-compliant coating system.
||Planned: Supplemental Proceedings volume