QUESTIONS AND ANSWERS FIRM A+
✔✔What are the requirements for NACE No.4/SSPC-SP 7? - ✔✔No visible oil, grease,
dirt, dust, loose mill scale, rust, or coating.
✔✔What are the requirements for ISO 8501-1 Sa 1? - ✔✔No visible oil, grease, dirt,
poorly adhering mill scale, rust, paint coatings, or foreign matter.
✔✔What is NACE No.8/SSPC-SP 14? - ✔✔Tightly adherent mill scale, rust, and coating
residues are permitted to remain on 10% unit square area of the surface, if they are
evenly distributed. Shadows, streaks and discolorations caused by stains of rust, mill
scale, and previously applied coating may be present on the remainder of the surface.
✔✔What is ISO 8501-1 Sa 2? - ✔✔Surface free from visible oil, grease, dirt, most mill
scale, rust, paint coatings, and foreign matter.
✔✔What is NACE No. 3/SSPC-SP 6? - ✔✔Random staining limited to no more than
33% of each unit area of surface (9 square inch). May consist of light shadows, slight
streaks or minor discolorations caused by stains of mill scale or stains of previously
applied coating.
✔✔What is NACE No. 2/SSPC-SP 10? - ✔✔Random staining limited to no more than
5% of each unit area of surface (9 square inch). May consist of light shadows, slight
streaks or minor discolorations caused by stains of mill scale or stains of previously
applied coating.
✔✔What is ISO 8501-1 Sa 2-1/2? - ✔✔Surface free from visible oil, grease, dirt, most
mill scale, rust, paint coatings, and foreign matter. Any remaining traces of
contaminants shall show only as slight stains in forms of spots or stripes.
✔✔What is NACE No. 1/SSPC-SP 5? - ✔✔No evidence of previously adherent material
and no shadows, streaks, or stains are allowed.
✔✔What is ISO 8501-1 Sa 3? - ✔✔Surface free from visible oil, grease, dirt, most mill
scale, rust, paint coatings, and foreign matter. It shall have a uniform metallic color.
✔✔What is the purpose of NACE No.8/SSPC-SP 14? - ✔✔To allow tightly adherent mill
scale, rust, and coating residues on a small portion of the surface.
✔✔What is the purpose of ISO 8501-1 Sa 2? - ✔✔To have a surface free from visible
oil, grease, dirt, mill scale, rust, paint coatings, and foreign matter.
,✔✔What is the purpose of NACE No. 3/SSPC-SP 6? - ✔✔To limit random staining on
the surface caused by mill scale or previously applied coating.
✔✔What is the purpose of NACE No. 2/SSPC-SP 10? - ✔✔To limit random staining on
the surface caused by mill scale or previously applied coating.
✔✔What is the purpose of ISO 8501-1 Sa 2-1/2? - ✔✔To have a surface free from
visible oil, grease, dirt, mill scale, rust, paint coatings, and foreign matter, with only slight
stains remaining.
✔✔What is the purpose of NACE No. 1/SSPC-SP 5? - ✔✔To have a surface with no
evidence of previously adherent material and no shadows, streaks, or stains.
✔✔What is the purpose of ISO 8501-1 Sa 3? - ✔✔To have a surface free from visible
oil, grease, dirt, mill scale, rust, paint coatings, and foreign matter, with a uniform
metallic color.
✔✔What are the acceptable conditions for NACE No.8/SSPC-SP 14? - ✔✔Tightly
adherent mill scale, rust, and coating residues are permitted on 10% unit square area,
with evenly distributed shadows, streaks, and discolorations on the remainder of the
surface.
✔✔What are the acceptable conditions for ISO 8501-1 Sa 2? - ✔✔Surface free from
visible oil, grease, dirt, most mill scale, rust, paint coatings, and foreign matter.
✔✔What are the acceptable conditions for NACE No. 3/SSPC-SP 6? - ✔✔Random
staining limited to no more than 33% of each unit area of surface (9 square inch),
consisting of light shadows, slight streaks, or minor discolorations caused by mill scale
or previously applied coating.
✔✔What is wet blasting? - ✔✔Method used for dust suppression.
✔✔What is the major concern with wet blasting? - ✔✔Flash rust can occur quickly after.
✔✔What are the three types of wet blasting? - ✔✔Vapor Blasting, Slurry Blasting, and
Halo/Water Ring Blasting.
✔✔What is NACE WAB-1/SSPC-SP 5 (WAB)? - ✔✔White Metal WAB.
✔✔What is NACE WAB-2/SSPC-SP 10 (WAB)? - ✔✔Near-White WAB.
✔✔What is NACE WAB-3/SSPC-SP 6 (WAB)? - ✔✔Commercial WAB.
✔✔What is NACE WAB-4/SSPC-SP 7 (WAB)? - ✔✔Brush-off WAB.
, ✔✔What is NACE WAB-8/SSPC-SP 14 (WAB)? - ✔✔Industrial WAB.
✔✔What is flash rust? - ✔✔Oxidation that forms on a steel surface.
✔✔What is SSPC-VIS 5/NACE VIS 9- WAB? - ✔✔Wet Abrasive Blast Cleaning.
✔✔What are the two initial conditions of SSPC-VIS 5/NACE VIS 9- WAB? -
✔✔Condition C and Condition D.
✔✔What is Condition C in SSPC-VIS 5/NACE VIS 9- WAB? - ✔✔Steel surface
completely covered with rust, little or no pitting visible.
✔✔What is Condition D in SSPC-VIS 5/NACE VIS 9- WAB? - ✔✔Steel surface
completely covered with rust, pitting visible.
✔✔How many levels of flash rusting are there? - ✔✔4.
✔✔What is the first level of flash rusting? - ✔✔No flash rust.
✔✔What is the second level of flash rusting? - ✔✔Light (L) flash rust surface.
✔✔What is the third level of flash rusting? - ✔✔Moderate (M) flash rust surface.
✔✔What is the fourth level of flash rusting? - ✔✔Heavy (H) flash rust surface.
✔✔What is Water Jetting? - ✔✔A method used in marine and utility industries.
✔✔How is Water Jetting used in the Marine industry? - ✔✔To exhaust antifouling
coating and remove marine growth.
✔✔What types of coating films can Water Jetting remove? - ✔✔Polyurethane and
polyurea.
✔✔What is NACE/SSPC WJ-1? - ✔✔Clean to bare substrate.
✔✔What is NACE/SSPC WJ-2? - ✔✔Very thorough cleaning.
✔✔What is NACE/SSPC WJ-3? - ✔✔Thorough cleaning.
✔✔What is NACE/SSPC WJ-4? - ✔✔Light cleaning.
✔✔What is ISO 8501-4 Wa 3? - ✔✔Waterjetting to bare substrate.