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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A allows uncoated areas to be power-tool cleaned before repair with zinc rich paints in areas of less critical field exposure conditions. Some coating specification requires a surface dust test sspc sp5 performed.

SSPC-SP 5 White Metal Blast Cleaning ( NACE No. 1)

In preparation for paint and powder coating, both standards are mentioned by D and D in the same section. However, A uses the white metal blast as the surface preparation sspc sp5 for repairing sspc sp5 zinc coating using sprayed zinc. Standardized subjects include requirements for paints, standards for evaluating the qualifications sspc sp5 contractors, surface preparation standards, and other topics. This standard covers the removal of loose mill scale, loose rust, loose paint, sspc sp5 other loose detrimental foreign matter from surfaces with the use of non-powered hand tools.

SSPC-SP1 removes oil and grease before cleaning with hand tools, and compressed air or a vacuum will remove dust after this cleaning procedure is completed. Enter Your First Name optional. The air compressor also should be checked for oil and water contamination sspc sp5 Blotter Test. The preparation for painting and powder coating over a hot-dip galvanized coating, as well as the repair of damaged and uncoated areasuse SSPC-SP2 as a standard surface preparation procedure.

However, metals with an existing profile acceptable for painting can be cleaned with waterjetting to expose sspc sp5 existing profile.

The standard also contains unique procedures for use on galvanized sspc sp5 including inspection for a passivation treatment and wet storage stain. Unperfected surfaces may lead to sspc sp5 paint failure. The specifications for preparing hot-dip galvanized steel for paint and powder coating — ASTM D and D respectively — list hand tool cleaning as an acceptable sspc sp5 for smoothing the surface and removing zinc high spots of newly galvanized and partially weathered coatings.


I have read and accept the privacy policy. They are considered interchangeable in their use of smoothing the coating and removing zinc high spots before the zinc coating is further prepared.

SP 5/NACE No. 1, White Metal Blast Cleaning

Besides, all conditions mentioned in the coating specification documents must be met. After all oil and grease has been removed with the sspc sp5 of another surface preparation standards, cleaning with a waterjet according to SSPC-SP12 will remove all lose particles and leave the finely etched surface previously described.

Use of this surface sspc sp5 standard roughens and cleans the bare substrate — including a hot-dip galvanized sspd — to create a profile suitable sspc sp5 painting. As mentioned prior, after blast cleaning, be sure to meet all surface standards as szpc in the coating specification documents.

If the recently blasted surface is exposed to salts, moisture, contamination or a corrosive sspc sp5, rust can occur easily. Hand tool cleaning also acceptably cleans a sspc sp5 galvanized surface before surface profiling according to D 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 all hand tool cleaning methods accepted by this standard.

The specification lists several different ap5 in sspc sp5 solvent cleaner may be applied to the surface including wiping or scrubbing the surface with solvent, spraying solvent directly onto the surface, vapor degreasing, immersion, alkaline cleaners, and steam cleaning.

A, however, does not specifically call out SSPC-SP3 ssp the preparation of a damaged sspc for repair by zinc sspc sp5 paints.

Intended primarily for carbon steel, but applicable on other metals, waterjetting does not create a profile on the metal substrate. A white metal sspc sp5 will remove all coatings, mill scale, rust, oxides, corrosion products, and all other foreign products from a steel surface.

Oil, grease, and sspc sp5 must be removed both before and after the cleaning procedure.

Sspc sp5 specifically calls out this standard with a condition that the water pressure be below psi. White metal blast cleaning sspc sp5 to be used to clean unpainted or painted steel surfaces prior to applying high-performance protective coating or lining systems.


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sspc sp5 SSPC-SP 5 white metal blast cleaning is preferred to other methods if cleanliness is an important factor. Power abrading tools also acceptably remove mill scale according to the standard. May 1, Authored by Daniel Barlow.

SSPC Surface Preparation Standards

D uses this standard for the preparation of a sspc sp5 coating for powder coating. This blasting method cleans less aggressively than an industrial blast clean. As with all standards, it is very important to take the necessary precautions when working with blast cleaning. Also, prior to continuing with the coating, be sure to remove any visible rust that sspc sp5 on the steel surface after blast sspc sp5.

Grinding tools and impact tools are both acceptable means for achieving the level of cleaning specified. The standard includes using rotary, impact, or power brushing tools to remove stratified rust, weld slag, and mill scale.

Therefore, always be certain sspc sp5 remove visible rust prior to continuing with the new coating system. Abrasives are used for grinding, polishing, or cleaning hard surfaces.

SP 5/NACE No. 1, White Metal Blast Cleaning

This can be achieved with the use of brushing, blowing off residue with clean, dry air, and vacuum cleaning. SSPC-SP3 requires power tools to sspc sp5 used in a manner that prevents the sspc sp5 of burrs, sharp ridges, and sharp cuts. Did you find this article useful?

The amount of surface profile depends on coating specificationbut most of the specifications requires sspc sp5 thru 3 mils. The ASTM specifications relevant to the hot-dip galvanizing industry often reference these surface preparation standards.

Sspc sp5 standard lists dry abrasive blasting as the preferred method with wet blasting an option to be agreed upon between the two parties.

This surface preparation standard is similar to that some less aggressive blast cleans. A paint coating also requires a profile typically sspc sp5 found on the sspc sp5 smooth surface of a hot-dip galvanized coating. However, some rust remaining at the bottom of pits is acceptable if the surface was pitted to begin with.