Requirements for “White Metal” – one of five levels of cleanliness of steel surfaces achieved by blast cleaning with the use of abrasives. (White Metal, Near-White. 1/SSPC-SP 5. White Metal Blast Cleaning. This NACE International (NACE)/ SSPC: The Society for Protective Coatings standard represents a consensus of. A white Metal blast will remove all coatings, mill scale, rust, oxides, corrosion products and most all other foreign products from a steel surface. SSPC-SP5.
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The size and type of abrasive media to be used depends on the profile specified by the coating system to be used. Therefore, it is often better than other blast cleaning as it requires higher standards of a clean surface. Grinding tools and impact tools are sp acceptable means for achieving the level of cleaning specified. The standard sspc sp5 using rotary, impact, or power brushing tools to remove stratified rust, weld slag, and mill scale. Return to coating inspection. SSPC-SP sspc sp5 white metal blast cleaning is preferred to other methods if cleanliness is spsc important factor.
The dew point is the temperature that condensation starts. A white metal blast will sspc sp5 all coatings, mill scale, rust, oxides, corrosion products, and all other foreign products from a steel surface. Some sspc sp5 specification sspc sp5 a surface dust test being performed.
The amount of surface profile depends on coating specificationbut most of the specifications requires 2 thru 3 mils. The surface may still include profiled and sspc sp5 adherent mill scale, rust, and coating. The standard requires the surface to be free from all visible oil, grease, dirt, dust, rust, coating, oxides, mill scale, corrosion products, and other foreign matter when viewed without magnification.
ASTM A calls for a near-white metal blast cleaning when field conditions include immersion.
The preparation for painting and powder coating over a hot-dip galvanized coating, as well as the repair of damaged and sspc sp5 areassspc sp5 SSPC-SP2 as a standard surface preparation procedure. Use of this surface preparation standard roughens and cleans the bare substrate — including a hot-dip galvanized coating — to create a profile suitable for painting.
SSPC-SP 5 White Metal Blast Cleaning ( NACE No. 1)
A, however, does not specifically call out SSPC-SP3 for the preparation of a damaged coating for repair by zinc rich sspc sp5. I understand that you will s5 my information to send me sspc sp5 newsletter. Usually occurring around after six months of weathering, a finely etched and roughened profile acceptable for paint covers the surface of the galvanized coating. The sandblasting process should not be done if the surface temperature is less than 5-degree Fahrenheit or sspc sp5 Celsius above the dew point.
Sspc sp5 also considers the two methods interchangeable during the surface cleaning phase ssp5 the process. A surface profile of no less than one mill between peaks and valleys is required. If the recently blasted surface is exposed to salts, moisture, contamination or sspc sp5 corrosive environment, rust can occur easily.
SP 5/NACE No. 1, White Metal Blast Cleaning
The standard then requires oil, grease, and dust to be removed from the surface and the work inspected. After all oil and grease has been sspc sp5 with the methods of another surface preparation standards, cleaning with a waterjet according to SSPC-SP12 will remove sspc sp5 lose particles and leave the finely etched surface previously described.
This surface preparation sspc sp5 is similar to that some less aggressive blast cleans. Feathering the edges of adhered paint surfaces is also required.
SSPC Surface Preparation Standards
SSPC-SP3 requires power tools to be used in sspc sp5 manner that prevents the formation of burrs, sharp ridges, and sharp cuts.
Comments Have your say about what you just read! Waterjetting is the use sspc sp5 standard jetting from a nozzle at high pressures 10, psi or higher to prepare a surface for coating.
Here is a list and brief summary of the surface preparation standards used in the hot-dip galvanizing industry with a brief summary of each. D uses this standard for the preparation of a galvanized coating for powder coating. Please note random staining, light shadows, discoloration sspc sp5 not allowed to remain on the surface.
As with all standards, it is very important to take the necessary precautions when working with blast cleaning. Intended primarily for carbon steel, but applicable on other metals, waterjetting does not create sspc sp5 profile on the metal substrate. Therefore, fewer imperfections are acceptable with white metal blast cleaning. In preparation for paint and powder coating, both standards are mentioned sspc sp5 D and D in the same section. Therefore, always be certain to remove visible rust prior to continuing with the new coating system.
Besides, all conditions mentioned in the coating specification documents sspc sp5 be met. Sspc sp5 metal blast cleaning is also used when immersion service requires the highest level of cleaning.