FROSIO 06B Surface grades ISO 8501.pptVIP

COATING ADVISOR ACADEMY Rustgrades A Steel surface largely covered with adhering mill scale but little, if any, rust. Rustgrades B Steel surface which has begun to rust and from which the mill scale has begun to flake Rustgrades C Steel surface on which the mill scale has rusted away or from which it can be scraped, but with slight pitting visible under normal vision Rustgrades D Steel surface on which the mill scale has rusted away and on which general pitting is visible under normal vision Blast-cleaning, Sa Sa 1 Light blast –cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter. Blast-cleaning, Sa Sa 2 Thorough blast –cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from most of the mill scale, rust, paint coatings and foreign matter. Any residual contamination shall be firmly adhering. Blast-cleaning, Sa Sa 2? Very thorough blast–cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from mill scale, rust, paint coatings and foreign matter. Any remaining traces of contamination shall show only as slight stains in the form of spots or stripes. Blast-cleaning, Sa Sa 3 Blast cleaning to visually clean steel When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from mill scale, rust, paint coatings and foreign matter. It shall have a uniform metallic color. Hand and power tool cleaning, St St 2 Thorough hand and power tool cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter. Hand and power tool cleaning, St St 3 Very thorough hand and power tool cleaning As for St 2 but the surface shall be treated much more thoroughly to give a metalli