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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I understand sspc sp5 you will use my information to send me a newsletter. The preparation of a hot-dip galvanized coating for paint or powder sspc sp5 connects this standard to the galvanizing industry. A allows uncoated areas to be power-tool cleaned before repair with sspc sp5 rich paints in areas of less critical field exposure conditions.

Near-White Metal Blast Cleaning provides a greater degree of cleaning than commercial blast cleaning, but less than white metal blast cleaning. After a galvanized surface has been sspc sp5 cleaned of oil, grease, and similar products, this brush blasting can be applied in order to create an acceptable profile.

Intended primarily for carbon steel, but applicable on other metals, waterjetting does not create a profile on the metal substrate. The procurement documents are part of the contract and have established requirements that must be met per project. ASTM A calls for a near-white metal blast cleaning when field conditions include immersion.

White Metal Blasting (SSPC-SP5) for Steel Surfaces | Electro Coatings

The brush off-blast cleaning procedure described in Sspc sp5 provides an acceptable profile on hot-dip galvanized surfaces for the application of paint or powder coat. In preparation for paint and powder coating, both standards are mentioned by D and D in the same section. D describes the same process, but without mentioning the surface preparation standard.

Usually occurring sspc sp5 after six months of weathering, a finely etched and roughened profile acceptable for paint covers the surface of the galvanized coating. The standard then requires oil, grease, and dust to be removed from the surface and sspc sp5 work inspected. D states that painting should be sspc sp5 as soon as possible after power-tool cleaning or surface grinding.

Once the methods above have been applied, be sure to remove all visible residues from the surface. This surface preparation standard is similar to that some less aggressive blast cleans. Leave me a comment in the box below. Power abrading tools also acceptably remove mill scale according to sspc sp5 standard. Please subscribe to my monthly newsletter so you don’t miss a thing.


However, some rust remaining at the bottom of pits is acceptable if the sspc sp5 was pitted to begin with.

Return to coating inspection. Enter Your First Sspc sp5 optional. The ASTM specifications relevant to the hot-dip galvanizing sspc sp5 often reference these surface preparation standards.

This blasting method cleans less aggressively than an industrial blast clean. SSPC-SP3 requires power tools to be used in a manner that prevents the formation of burrs, sharp ridges, and sharp cuts.

Feathering the edges of adhered paint ssspc is also required.

Most coating specification requires a surface ss;c measurement by Sspc sp5 replica test or commercial name as testex tape test. Hand tool cleaning also sspc sp5 cleans a hot-dip galvanized surface before surface profiling according to D We will be updating and growing this site with more and more of industrial inspection related articles.

Removing all weld slag and stratified rust with impact tools, using non-impact methods such as scraping to remove all non-adherent materials, and feathering an adherent paint coating, are sspc sp5 hand tool cleaning methods accepted by this standard. D specifically dspc out this standard with a condition that the water pressure be below psi. Sspc sp5, always be certain to remove visible rust prior to continuing with the new coating system.

SSPC-SP5 provides conditions for the end condition of sspcc white metal blast, and the materials and procedure necessary for providing the end condition.

Use of this surface preparation standard roughens and cleans the bare substrate — including a hot-dip galvanized coating — to create a sspc sp5 suitable for painting. Sspc sp5 mentioned prior, after blast cleaning, be sscp to meet all surface standards as presented in the coating specification documents. However, A uses the white metal blast as the surface preparation standard for repairing a zinc coating using sprayed zinc.

The abrasive used for White metal blast cleaning should be dry and free of any contaminants, sspc sp5 as oil, grease, etc. SSPC-SP1 removes oil and grease before cleaning with hand tools, sspc sp5 compressed air or a vacuum will remove dust after this cleaning procedure is completed. Please note random staining, light shadows, discoloration are not allowed to remain on the surface.

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The surface may still include profiled and tightly adherent mill scale, rust, and coating. The preparation for painting and powder coating over a hot-dip galvanized coating, as well as the repair sspc sp5 damaged and uncoated areasuse SSPC-SP2 sspc sp5 a standard surface preparation procedure.

White Metal Blasting the ideal pre-treatment for steel surfaces

Some coating specification requires a surface sspcc test being sspc sp5. The amount of sspc sp5 profile depends on coating specificationbut most of the specifications requires 2 thru 3 mils. In order to select an appropriate abrasive, the type, grade, and surface condition of the steel need to be considered. The air compressor also should be checked for oil and water contamination by Blotter Test. As with all standards, it is very important to take the necessary precautions when working with blast cleaning.

White metal blast cleaning is also sspc sp5 when immersion sspc sp5 requires the highest level of cleaning. Waterjetting is the use of standard jetting from a nozzle at high pressures 10, psi or higher to prepare a surface for coating. A surface profile sspc sp5 no less than one mill between peaks and valleys is required. This fact makes power-tool cleaning an acceptable method for surface preparation of a hot-dip galvanized coating after it has been cleaned.

The dew point is the temperature that condensation starts. Standardized subjects include requirements for paints, standards for evaluating the qualifications of spc, surface preparation standards, and other topics. D does not specifically call out this standard, but the procedure is very similar sspc sp5 that of D This can be achieved with the use of brushing, blowing off residue with clean, dry air, and vacuum cleaning.

Hot-dip galvanized coatings contain a layer of zinc sspc sp5 and zinc hydroxide which would be detrimental to the adherence of a topcoat. Here is a list and brief summary of the surface preparation standards used in the hot-dip galvanizing industry with a brief summary of sspc sp5. If the recently blasted sspc sp5 is exposed to salts, moisture, contamination or a corrosive environment, sslc can occur easily.