This joint standard covers the use of blast cleaning abrasives
to achieve a defined degree of cleaning of steel surfaces prior to
the application of a protective coating or lining system. This
standard is intended for use by coating or lining specifiers,
applicators, inspectors, or others who may be responsible for
defining a standard degree of surface cleanliness.
The focus of this standard is white metal blast cleaning.
Near-white metal blast cleaning, commercial blast cleaning,
industrial blast cleaning, and brush-off blast cleaning are
addressed in separate standards.
White metal blast cleaning provides a greater degree of cleaning
than near-white metal blast cleaning (SSPC-SP 10/NACE No. 2).
The difference between a white metal blast and a nearwhite metal
blast is that a white metal blast removes all of the coating, mill
scale, rust, oxides, corrosion products, and other foreign matter
from the surface. Near-white metal blasting allows light shadows,
slight streaks, or minor discolorations caused by stains of rust,
stains of mill scale, or stains of previously applied coating to
remain on no more than 5 percent of each unit area of surface as
defined in SSPC-SP 10/NACE No. 2.
This joint standard was originally prepared in 1994 and
reaffirmed in 2000 by the SSPC/NACE Task Group A on Surface
Preparation by Abrasive Blast Cleaning. This joint task group
includes members of both the SSPC Surface Preparation Committee and
the NACE Unit Committee T-6G on Surface Preparation. It was
reaffirmed in 2006 by the SSPC Surface Preparation Committee and
NACE Specific Technology Group (STG) 04, Protective Coatings and
Linings: Surface Preparation.
In SSPC/NACE standards shall and must are used
to state mandatory requirements. Should is used to state
that which is considered good and is recommended but is not
absolutely mandatory. May is used to state that which is
Order online or call: Americas: +1 800 854 7179 | Asia Pacific: +852 2368 5733 | Europe, Middle East, Africa: +44 1344 328039