January 11, 2019 posted by

1/SSPC-SP 5. White Metal Blast Cleaning. This NACE International (NACE)/ SSPC: The Society for Protective Coatings standard represents a consensus of. 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. SSPC-SP5. A Sa 3, B Sa 3, C Sa 3 and D Sa 3. SSPC-SP A Sa 2½, B Sa 2½, C Sa 2½ and D Sa 2½. SSPC-SP6. B Sa2, C Sa 2 and D Sa 2. SSPC-SP7.

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Unperfected surfaces may lead to premature paint failure. I have read and accept the privacy policy. Substrate temperature should not be colder surrounding air temperature; otherwise, the moisture can condensate on the cleaned-blast surface and cause flash rust.

Please subscribe to my monthly newsletter so you don’t miss a thing. Therefore, it is often better than other blast cleaning as it requires higher standards of a clean surface.

If the recently blasted surface is exposed to salts, moisture, contamination or a corrosive environment, rust can occur easily. We will be updating and growing this site with more and more of industrial inspection related articles.

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

I understand that you will use my information to send me a newsletter. The sandblasting process should not be done if the surface temperature is less than 5-degree Fahrenheit or 3-degree Celsius above the dew point.

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Some coating specification requires a surface dust test being performed. Return to coating inspection.

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

I am at least 16 years of age. White metal blast cleaning s5 also used when immersion service requires the highest level of cleaning.

Enter Your First Name optional. Therefore, fewer imperfections are acceptable with white metal blast cleaning. Comments Have your say about what you just read! Abrasives are used for grinding, polishing, or cleaning hard surfaces.

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

Therefore, always be certain to remove visible rust prior to continuing with the dp5 coating system. Once the methods above have been applied, be sure to remove all visible residues from the surface. The abrasive used for White metal blast cleaning should be dry and free of any contaminants, such as oil, grease, etc.

Leave me a comment in the box below. Also, prior to continuing with the coating, be sure to remove any visible rust that forms on the steel surface after blast cleaning.

Did you find this article useful? The amount of surface profile depends on coating specificationbut most of the specifications requires 2 thru 3 mils. White metal blast cleaning is to be used to clean unpainted or painted steel surfaces prior to applying high-performance protective coating or lining systems. Please note random staining, light shadows, discoloration are not allowed to remain on the surface. As mentioned prior, after blast cleaning, be sure to meet all surface standards as presented in the coating specification documents.

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

As with all standards, it is very important to take the necessary precautions when working with blast cleaning. The coating specification also might call for chloride testing to ensure deposited soluble salts are not higher the sxpc limit.

In order to be able to apply white metal blast cleaning be sure that all visible oil, grease, and other contaminant residues are removed. Besides, all conditions mentioned in the coating specification documents must be met.

The air compressor also should be checked for oil and water contamination by Blotter Test. Most coating specification requires a surface profile s;5 by Press-O-Film replica test or commercial name as testex tape test. The dew point is the temperature that condensation starts. The procurement documents are part of the contract and have established requirements that must be met per project. This can be achieved with the use of brushing, blowing off residue with clean, dry air, and vacuum cleaning.

SSPC-SP 5 white metal blast cleaning is espc to other methods if cleanliness is an important factor. In order to select an appropriate abrasive, the type, grade, and surface condition of the steel need to be considered. The abrasives selected for this spp5 depend on a variety of factors.