Near-White Metal Blast Cleaning

This standard defines the process for preparing a carbon steel surface to the Near-White Metal degree of surface cleanliness using a dry abrasive blast method of cleaning. This standard is intended for use by coating or lining specifiers, applicators, inspectors, or others whose responsibility is to specify, prepare, or inspect carbon steel surfaces to the degree of surface cleanliness required by this standard. The requirements include the end condition of the surface as determined by visual inspection and the materials and procedures used to achieve and verify the end condition. Appendix A (nonmandatory) provides additional supplementary information. Paragraph A1 provides an example of language that may be used in a project specification where SSPC-SP 10/NACE No. 2 is specified.

This standard is limited to requirements for visible surface contaminants. Information on nonvisible surface contaminants (NVSC) and an example specification statement are in Paragraph A2. Information on soluble salt testing is in SSPC-Guide 15.

SSPC-SP 10 (WAB)/NACE WAB-2 should be specified if wet abrasive blast cleaning (WAB) technology is required.

This standard was last revised in 2007. Although the technical requirements for near-white metal surface cleanliness have not changed since the 2007 revision, the organization of the standard has been revised to reflect requirements of the AMPP Publications Style Manual: Standards. Nonmandatory appendix paragraphs have been added to address removal of pack rust, rust scale, and staining. Editorial revisions to streamline and clarify language have also been made.