They reflect similar permissible levels of stains and tightly-adhered rust, mill scale and coatings, and can be summed up with a chart: *Estimated surface area. ISO 8501-1 is a visual reference and does not explicitly state percentages. The specifications specifically mention stains, str...
The 2012 revisions have not changed either standard's existing requirements for surface cleanliness and minimum surface profile. Revisions made to language common to both standards includeJournal of Protective Coatings &Linings GroupJournal of Protective Coatings & Linings...