This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Protective. ASTM D Standard Practice for Surface Cleaning Concrete for Coating. ASTM D (Plastic sheet test): Place plastic sheet on concrete stab for 24 hours. o ASTM-D Standard Practice for Surface Cleaning Concrete for.
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Proper surface preparation can improve the outcome of your coating system. The steps below are provided for assistance in properly preparing various common substrates before coating. Following these guidelines will help ensure sufficient adhesion of the coating and can help prolong the life of the coating system.
Surface must be free of laitance, concrete dust, dirt, form release agents, moisture curing membranes, loose cement, and hardeners. All loose mortar and foreign material should be removed from block. The procedures below are intended to help assure optimum performance of the coating system and suitable coating adhesion to concrete:.
Brush Blasting or Sweep Blasting Includes dry blasting, water blasting, water blasting with abrasives, and vacuum blasting with abrasives. The surface to be coated must be clean and free of contaminants, oil, loose cement, mortar, and grease.
Vacuum cleaning, broom cleaning, water cleaning, air blast cleaning, and steam cleaning are suitable as outlined in ASTM D Concrete curing compounds, hardeners, and form release agents may not be compatible with recommended coatings. To test compatibility, apply a square foot area with the coating system, and allow concrete to dry one week before testing adhesion per ASTM D Surface preparation methods as outlined in ASTM D are required if the coating system is incompatible.
Ensure that all surface contamination has been removed by washing with an appropriate cleaner. Rinse thoroughly and allow to dry. Any existing checked or peeling paint should be scraped and sanded to a sound surface. Glossy surfaces should be sanded dull. If necessary, pressure clean with a minimum of psi to remove all dirt, dust, oil, grease, laitance, loose particles, foreign material, and peeling or defective coatings.
Allow the surface to dry thoroughly. If the surface is new, test it for pH, many times the pH may be 10 or higher. Drywall should be clean and dry. Tape and cover joints with a joint compound. All nail heads must be set and spackled.
Make sure all spackled nail heads and tape joints are sanded smooth and all dust removed prior to painting. For exterior surfaces, spackle with exterior grade compounds. Asrm composition board siding hardboard must be thoroughly cleaned and primed with an alkyd primer, whether factory primed or unprimed. Some composition boards may emit a waxy material that must be removed with a solvent prior to coating.
Galvanized metal must weather at least 6 months before coating. When weathering is not possible or the surface has been treated with chromates or silicates, first Solvent Clean per SSPC-SP1 astmm apply a test area, priming d428 required. Allow the coating to dry at least one week before testing for adhesion. Allow to d44258 and cure thoroughly for at least 30 days prior to painting. Bare plaster must be cured and hard before application.
Damaged areas must be repaired with an appropriate patching material. Treat textured, soft, porous, or powdery plaster with a solution of 1 pint household vinegar to 1 gallon of water. Repeat until the surface is hard.
Rinse with clear water and allow to dry.
The room d4285 be ventilated while drying. Rooms must be heated in cold, damp weather. Remove all dust, oil, wax, grease, loose paint, mill scale, rust, dirt, mold, mildew, mortar, asstm, sealers, and other surface contaminants.
Dull glossy surfaces prior to painting. Use an appropriate primer to spot prime any bare ares. Maintenance painting will frequently not permit or require complete removal of all old coatings prior to repainting. Thorough washing with an abrasive cleanser will clean and dull in one operation, or, wash thoroughly and dull by sanding.
Be advised that any coatings left on the surface to be painted may compromise the service length of the system. Check for compatibility v4258 applying a test patch of the recommended coating system, covering at least 2 to 3 square feet.
If coating system is incompatible, complete removal of previous coating s is required per ASTMsee “Concrete Adtm Cleaning ” above. Clean steel using one or more of the nine surface preparations described below. Established by the Steel Structures Council inthese methods are used throughout the world for describing methods for cleaning structural steel.
This method is suitable for removal of all visible oil, drawing and cutting compounds, grease, soil, and other soluble contaminants. Mill scale and rust cannot be removed by solvent cleaning.
Rags and cleaning solution should be changed frequently so that deposits of oil and grease are not spread over additional areas in the cleaning process. Hand Tool Cleaning will remove all loose rust, loose mill scale, and other undesired foreign matter. Adherent mill scale, paint, and rust are not able to be removed by this process.
ASTM D – 05 Standard Practice for Surface Cleaning Concrete for Coating
Make sure all visible grease, oil, salts, and soluble welding d4528 have asttm removed before hand tool cleaning by the methods outlined in SSPC-SP 1. All loose rust, loose mill scale, loose and other detrimental foreign matter can be removed by power tool cleaning. Make sure all visible astn, oil, salts, and soluble welding residues have been removed prior to asmt tool cleaning by the methods outlined in SSPC-SP 1. When viewed without magnification, a White Metal Blast Cleaned surface should be free of any visible grease, oil, dust, dirt, mill scale, paint, rust, oxides, corrosion products, and other foreign matter.
Visible deposits of grease or oil must be removed prior to blast cleaning by any method specified in SSPC-SP 1 astn other agreed upon methods. Staining to be cleaned may consist of light shadows, slight streaks, or minor discolorations caused by stains of rust, mill scale, or previously applied paint.
When viewed without magnification, a Brush-Off Blast Cleaned surface should be free of any visible grease, oil, dust, dirt, loose mill scale, loose paint, and loose e4258. Mill scale, paint, and rust that is tightly adhered to the surface may remain even after Brush-Off Blast Cleaning. When viewed without magnification, a metallic surface prepared according to this specification should be free of any visible grease, oil, dust, dirt, mill scale, paint, rust, oxides, corrosion products, and other foreign matter.
Small residues of rust and paint may be left in the lower portions of pits if the original surface is pitted. Visible deposits of grease or oil must be removed prior to power tool surface preparation by any method specified in Asstm 1, Solvent Cleaning, or other agreed upon methods. When viewed without magnification, a Near-White Blast Cleaned surface should be free of any visible grease, oil, dust, dirt, mill scale, paint, rust, oxides, corrosion products, and other foreign matter, with the exception of staining.
Method of cleaning steel to remove dirt, oil, grease, loose rust, loose mill scale, and loose paint using water at pressures of 2, to 2, psi at a flow of 4 to 14 gallons per minute. Ensure that the surface is clean and free of any loose stucco, and that surface pH is between 6 and 9. The surface may be painted after 30 days if recommended procedures for applying stucco are awtm, and normal drying conditions exist.
Conco Paints – Surface Preparation
Wood must be clean and sstm. Ensure that knots and pitch streaks are scraped, sanded, and spot primed before a full priming coat is applied.
Patch all nail holes and imperfections with a wood filler or putty d42258 sand smooth. Prime and paint as soon as possible after surface prep. Caulk should be applied after priming. Store finishing lumber and flooring in dry, warm rooms to prevent absorption of moisture, shrinkage, and roughening of the wood.
Sand surfaces smooth, taking care to sand with the grain. Surface imperfections should be corrected and cleaned prior to painting. Thoroughly cleanse vinyl siding by scrubbing with a warm, soapy water solution.
Rinse asrm and allow to dry. Surface Preparation Proper surface preparation can improve the outcome of your coating system.