- Author
- McKnight, M. E. | Bentz, D. P. | Roberts, W. E.
- Title
- Measuring the Extent of Rust on Steel After Abrasive Blasting: A Feasibility Study.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
- NISTIR 90-4257, March 1990, 20 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- abrasive blasting | cleanness | coatings | emissivity | imaging | infrared thermography | roughness | rust | steel | surface
- Abstract
- The service life of a coating on steel is known to depend upon the condition of the surface prior to painting. Factors used to assess surface preparation include extent of rust remaining on the surface, roughness, and concentration of inorganic contaminants. This report is only concerned with assessing the extent of rust. Presently, the extent of rust is determined using standard definitions and visual standards, a subjective procedure. Since a more objective procedure is desirable, video imaging and infrared thermographic techniques were assessed. It was concluded that infrared thermography does not provide the basis for a simple, sensitive method for assessing the extent of rust but that video imaging shows promise to meet this need.