Surface Preparation Standards SP10 SSPC Chart

User Manual: SP10

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Surface Preparation Standards
System
SSPC Codes
NACE
CDN. Govt.
(CGSB)
Swedish
Standard
British
Standard
Solvent Clean
SSPC.SP1
SP1 Definition
Hand Tool Clean
SSPC.SP2
SP2 Definition
31 GP 401
St. 2
(approx.)
Power Tool Clean
SSPC.SP3
SP3 Definition
31 GP 402
St. 3
Flame Clean (new steel)
SSPC.SP4
31 GP 403
White Metal Blast
SSPC.SP5
SP5 Definition
SP5 Picture
NACE #1
31 GP 404
Type 1
Sa. 3
BS4232
First Quality
Commercial Blast
SSPC.SP6
SP6 Definition
SP6 Picture
NACE #3
31 GP 404
Type 2
Sa. 2
BS4232
Third Quality
Brush Off Blast
SSPC.SP7
SP7 Definition
SP7 Picture
NACE #4
31 GP 404
Type 3
Sa. 1
Light blast to
brush-off
Pickling
SSPC.SP8
Weather and Blast
SSPC.SP9
Near White Blast
SSPC.SP10
SP10 Definition
SP10 Picture
NACE #2
Sa. 2 ½
BS4232
Second Quality
Power Tool Cleaning to
Bare Metal
SSPC.SP11
SP11 Definition
Non-Ferrous Metals
Aluminium
Definition
Brass, Bronze, Copper, Lead, Terne Definition
Galvanized Metal
Definition
Solvent Cleaning SSPC-SP1 Definition:
Solvents such as water, mineral spirits, xylol, toluol etc., are used to remove solvent-soluble foreign matter from the surface of ferrous metals. Rags and solvents must be replenished
frequently to avoid spreading the contaminant rather than removing it. Low-pressure (1500 - 4000 psi) high volume (3 - 5 gal/min.) water washing with appropriate cleaning chemicals
is a recognized "solvent cleaning" method. All surfaces should be should be cleaned per this specification prior to using hand tools or blast equipment.
Hand Tool Cleaning SSPC-SP2 (SSI-St3) Definition:
A mechanical method of surface preparation involving wire brushing, scraping, chipping and sanding. Not the most desirable method of surface preparation, but can be used for mild
exposure conditions. Optimum performances of protective coatings should not be expected when hand tool cleaning is employed.
Power Tool Cleaning SSPC-SP3 (SSI-St3) Definition:
A mechanical method of surface preparation widely used in industry and involving the use of power sanders or wire brushes, power chipping hammers, abrasive grinding wheels,
needle guns etc. Although usually more effective than hand tool cleaning, it is not considered adequate for use under severe exposure conditions or for immersion applications.
White Metal Blasting SSPC-SP5 (SSI-Sa3), or NACE #1 Definition:
The removal of all visible rust, mill scale, paint and contaminants, leaving the metal uniformly white or gray in appearance. This is the ultimate in blast cleaning. Use where maximum
performance of protective coatings is necessary due to exceptionally severe conditions such as constant immersion in water or liquid chemicals.
Commercial Blast SSPC-SP6 (SSI-Sa2), or NACE #3 Definition:
All oil, grease, dirt, rust scale and foreign matter are completely removed from the surface and all rust, mill scale and old paint are completely removed by abrasive blasting except for
slight shadows, streaks or discolorations caused by rust stain, mill scale oxides or slight, tight resides of paint or coating that remain. If the surface is pitted, slight residue of rust or
paint may be found in the bottom of pits; at least two-thirds of each square inch of surface area shall be free of all visible residues and the remainder shall be limited to the light
residues mentioned above.
Brush Off Blast SSPC-SP7 (SSI-Sa1), or NACE #4 Definition:
A method in which all oil, grease, dirt, rust scale, loose mill scale, loose rust and loose paint or coatings are removed completely. Tight mill scale and tightly-adhered rust, paint and
coatings are permitted to remain. However all mill scale and rust must have been exposed to the abrasive blast pattern sufficiently to expose numerous flecks of the underlying metal
fairly uniformly distributed over the entire surface.
Brush Off Blast SSPC-SP10 (SSI-Sa2 ½), or NACE #2 Definition:
In this method, all oil, grease, dirt, mill scale, rust, corrosion products, oxides, paint or other foreign matter have been completely removed from the surface by abrasive blasting, except
for very light shadows, very slight streaks or slight discolorations caused by rust stain, mill scale oxides or slight, tight residues of paint or coating. At least 95% of each square inch of
surface area shall be free of all visible residues, and the remainder shall be limited to the light discolorations mentioned above. From a practical standpoint, this is probably the best
quality surface preparation that can be expected to today for existing plant facility maintenance work.
Power Tool Cleaning to Bare Metal SSPC-SP11 Definition:
Utilizing same equipment as Power Tool Cleaning to remove all visible coatings and contaminants to bare metal substrate.
Aluminium Definition:
Remove water-soluble dirt and chemicals with water and detergent; solvent-soluble contaminants with solvent. Rinse, allow to dry, them power or hand abrade to remove the thin film
of aluminium oxide. Moderate exposures require only one or two topcoats. Avoid using lead pigmented primers and topcoats. Exposure to corrosive chemicals calls for an epoxy
primer followed by an appropriate topcoat for the environment.
Brass, Bronze, Copper, Lead, Terne Definition:
Remove contaminants with a combination of water, detergents and solvents (same as aluminium). Allow the metal to dry, then power or hand abrade to remove oxides. Conventional
oil and alkyd base primers or finishes may be used.
Galvanized Metal Definition:
Clean same as aluminium and Brass etc, or allow to weather for six months. Caution: Be sure the manufacturer of the galvanized metal has used a paintable "white rust" preventative.
Conventional coatings containing oil or alkyd resins must not be used. Specify only special primers made for use on galvanized metal. In severe Type A environments, or in areas of
high humidity or continuous condensation, brush blasting is recommended to assure maximum system adhesion and performance.

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