What does SSPC-SP10 involve in terms of surface preparation?

SSPC-SP10 refers to a specific standard for surface preparation known as "Near-White Blast Cleaning." This standard entails preparing the surface of metal to a condition where all visible rust, mill scale, and old coating are removed, leaving a clean, bare surface. This level of cleaning is essential to ensure optimal adhesion of coatings and is characterized by a visual standard where the surface must appear nearly white with some minimal stains or shadows permitted.

In power tool cleaning to bare metal, as outlined by this standard, the use of power tools is involved to achieve the necessary cleanliness and surface profile. This method ensures that the substrate is free of any contaminants that could affect the performance of the coating system applied subsequently. The process is critical in sectors where protective coatings are applied to steel structures, ensuring longevity and effectiveness.

The other options focus on less rigorous or different standards of surface preparation, like brush-off cleaning or commercial-grade cleaning, which do not achieve as high a level of cleanliness as specified in SSPC-SP10. Moreover, surface preparation of concrete falls outside the material considerations for SSPC-SP10, which is strictly related to metal substrates.