Measuring the Extent of Rust on Steel After Abrasive Blasting: A Feasibility Study

摘要

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. The 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 the video imaging shows promise to meet the need.