- Author
- Sleater, G. A.
- Title
- Performance of Industrial-Type Cladding Materials. Final Report. June 1969-May 1972.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- Department of the Army, Washington, DC Department of the Air Force, Washington, DC Department of the Navy, Washington, DC
- Report
- NBSIR 74-134, March 1973, 63 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- cladding | organic coatings | accelerated weathering | natural weathering | field inspection | performance specification
- Abstract
- The main objective of a three year research program in industrial-type cladding systems at the National Bureau of Standards was to develop a performance specification for such cladding materials. The research program consisted of laboratory and natural weathering tests of cladding specimens, complemented by field inspection of in-service industrial cladding. Only cladding with an aluminum or a galvanized steel substrate, covered with a factory-applied organic coating, was evaluated. The laboratory testing program included measurement of color and gloss changes consequent to accelerated weathering procedures, and tests for cladding resistance to salt spray, moisture permeation, impact and abrasion. Exposure of cladding specimens to natural weathering was done at seven National Bureau of Standards exposure stations throughout the United States. Field inspection tours of in-service cladding were made in the Eastern and Southeastern United States and Puerto Rico. The criteria to implement the performance specification for industrial cladding were based upon the combined information from test data and field inspection. In addition, the results of cladding exposure to natural weathering were correlated with the test data from cladding exposure to laboratory accelerated weathering procedures. Suggestions for protection of cladding from in-service damage are also given.