1. Scope 1.1 This test method is a procedure for assessing visible surface particulate contaminants on various substrates such as steel, non-ferrous metals, concrete, plaster, sheet rock, etc. It is suitable for both field and laboratory use to obtain a permanent record of visible surface particulate contaminants. 1.2 Various surface preparation methods, such as shot-blasting, abrasive blast cleaning, grinding and sanding are used to produce a texture, roughness or anchor profile to a surface. The degree of surface cleanliness of the surface profile has been shown by coating manufacturers to be a contributing factor in coating, sealer and overlay adhesion and performance. They ask, on their Product Data Sheets (PDS), for the removal of all surface contaminants prior to coating. application. The practice consists of the application of a pressure sensitive foam tape to the surface followed by the removal of particulate contamination with the removal of the foam tape. The tape with the adhering particles is then placed between images depicting certifiable percentage amounts.
KeywordsVisual Surface Contaminants, Foam Tape
For proper bonding of coatings, sealer and overlays, it is important that a prepared surface (i.e. steel, non-ferrous materials, concrete, sheetrock, etc.) be properly cleaned, inspected and recorded. This test method allows contractors, applicators and inspectors to obtain a permanent record of the surface cleanliness prior to application. This allows for evaluation/comparison of the tested foam tape to a certified visual percentages. This permanent sample may also prove useful in resolving future disputes.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top