| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Coatings and Surface Engineering for Environmental Protection
|
| Presentation Title |
Coating Performance and Atmospheric Corrosion Measurements |
| Author(s) |
Brandi Clark, Fritz Friedersdorf, Jacob Wright, Liam Agnew |
| On-Site Speaker (Planned) |
Brandi Clark |
| Abstract Scope |
Organic coatings are the primary means of protecting structures from atmospheric corrosion in harsh environments. However, corrosion tests for coatings development, qualification, and selection often provide poor correlation to service performance, and conventional tests do not measure interactions between specific environmental parameters and material degradation. To improve coating evaluations, electrochemical sensors and data acquisition systems have been developed to monitor coating performance and corrosion continuously during atmospheric tests. Continuous measurements of environment, corrosion rates, and coating properties can be used to improve laboratory corrosion tests for material evaluations. Results have been obtained using a range of salt chemistries to demonstrate how humidity and temperature can be used to accelerate specific corrosion processes. Comparison of laboratory tests and outdoor environments indicate that rates of wetting and drying control moisture diffusion in coatings, and localized corrosion phenomena accelerate at intermediate humidities, while uniform corrosion is greatest at high humidity. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |