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Corrosion Detection System Impacts Coating Decisions

Monday, April 2, 2018

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Scientists based out of the Air Force Research Laboratory and the Air Force Corrosion Prevention and Control Office, working in collaboration with Luna Innovations Inc., have developed a new corrosion and coating evaluation system that they say can accelerate coating materials performance evaluations.

According to Chad Hunter, team lead for corrosion and erosion in the Systems Support Division at the AFRL Materials and Manufacturing Directorate, the cost of corrosion control can be controlled by a better understanding of corrosion performance of materials put on aircraft.

Corrosion Evaluation System

The new evaluation system—known as CorRES—measures coatings’ ability to protect aircraft by using sensor panels that perform electrochemical measurements during corrosion testing. Unlike the more traditional visual-based testing alternative, the system records corrosion rate data throughout the course of a test and transmits the data to a base station for evaluation. In turn, this information reveals when a coating fails during a test.

Air Force Research Laboratory

Scientists based out of the Air Force Research Laboratory and the Air Force Corrosion Prevention and Control Office, working in collaboration with Luna Innovations Inc., have developed a new corrosion and coating evaluation system that can accelerate coating materials performance evaluations.

“Legacy systems do not produce time-based, quantitative measurements inside of the test chamber, but rather, these are taken after a panel is removed,” said Hunter. “There’s a lot of variability in corrosion tests, and CorRES allows us to monitor this variability and provides quantitative data that help us better understand a coating’s performance in the lab so we can project how it will perform in the operational environment.”

The CorRES system uses sensing elements to measure free and galvanic corrosion, coating barrier properties and environmental effects on coating materials.

The system can be used in both a laboratory environment as well as outdoor exposure sites; this means that under-performing coatings can be eliminated from screenings earlier during testing.

“With this system we are able to get some granularity on performance. For example, you can test 20 primers, and they all may pass, but the pass is with a different degree of success,” noted Hunter. “This will help us to determine which performed the best based on sensing data. We can pinpoint when change happens.”

CorRES platforms are also r eportedly being used by a U.S. aircraft manufacturer, alloy producer, coatings raw material manufacturer and the UK National Physical Laboratory.

   

Tagged categories: Corrosion; Galvanic corrosion; NA; North America; Program/Project Management; Research and development; Testing + Evaluation; U.S. Air Force

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