1、SSPC-Paint 33November 1, 2006 Reaffirmed with editorial revisions June 15, 201511. Scope1.1 This specification covers a cold-applied coal-tar coating for use on underground and underwater steel structures.1.2 INTENDED USE: This coating, when applied over properly prepared carbon steel, is suitable f
2、or use on parts or structures exposed in Environmental Zones 2A (frequently wet by fresh water), 2B (frequently wet by salt water), 2C (fresh water immersion), 2D (salt water immersion), 3B (chemical exposure neutral), and 3C (chemical exposure alkaline). The coating is also suitable for use on hydr
3、aulic structures and pipe. It must be used with discretion for immersion in corrosive chemicals since the coating is dissolved by some organic solvents and attacked by oxidizing solutions.1.3 This coating is intended for application by brush or spray for use by itself or as a primer in a multi-coat
4、system. 2. Description2.1 The coating described in this specification consists of a cold-applied, black, self-priming, heavy-duty protective coating. It is based on a blend of coal-tar pitch, selected solvents, and fillers.2.2 The coating contains approximately 70 percent by volume of non-volatile f
5、ilm-forming solids. The theoretical spreading rate for a 380 m (15 mil) dry film thickness is approximately 1.8 m2/L (75 ft2/gal). Actual spreading rates can be significantly lower. 2.3. To prevent checking and alligatoring when exposed to sunlight, the coating must be topcoated with a coal-tar emul
6、sion coating meeting SSPC-Paint 32, or other suitable topcoat.3. Referenced Standards3.1 The latest issue, revision, or amendment of the referenced standards in effect on the date of invitation to bid shall govern, unless otherwise specified. Standards marked with an asterisk (*) are referenced only
7、 in the Notes, which are not requirements of this specification.3.2 If there is a conflict between the requirements of any of the cited referenced standards and this specification, the requirements of this specification shall prevail.3.3 SSPC STANDARDS:Guide 13 Guide for the Identification and Use o
8、f Industrial Coating Materials in Computerized Product DatabasesPA 2 Procedure for Determining Confor-mance to Dry Coating Thickness RequirementsPaint 32 Coal-Tar Emulsion CoatingSP 1 Solvent CleaningSP 2 Hand Tool CleaningSP 3 Power Tool Cleaning3.4 ASTM INTERNATIONAL STANDARDS:1D5 Standard Test Me
9、thod for Penetra-tion of Bituminous MaterialsD20 Standard Test Method for Distillation of Road Tars D36 Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)D92 Standard Test Method for Flash and Fire Points by Cleveland Open Cup TesterD453 Standard Test Method for Tar Acids
10、in Creosote-Coal Tar Solutions (with-drawn 2006)* D562 Standard Test Method for Consis-tency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer Type Viscometer* D1475 Standard Test Method for Density of Liquid Coatings, Inks, and Related ProductsD1640 Standard Test Methods for Drying, Cur
11、ing, or Film Formation of Organic Coatings at Room TemperatureD2369 Standard Test Method for Volatile Content of CoatingsD2794 Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)* D3174 Standard Test Method for Ash in the Analysis Sample of Coal and C
12、oke from Coal 1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. For referenced ASTM standards, visit the ASTM website, , or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards volume information, refer to the standards Document Summary pag
13、e on the ASTM website.SSPC: The Society for Protective CoatingsCoating Standard No. 33Coal Tar Mastic Coating, Cold-AppliedSSPC-Paint 33November 1, 2006 Reaffirmed with editorial revisions June 15, 20152D3924 Standard Specification for Standard Environment for Conditioning and Testing Paint, Varnish
14、, Lacquer, and Related MaterialsD3925 Standard Practice for Sampling Liquid Paints and Related Pigmented CoatingsD6677 Standard Test Method for Evaluating Adhesion by Knife3.5 UNITED NATIONS STANDARD2GHS Globally Harmonized System of Classification and Labelling of Chem-icals (GHS), 4th Revised Edit
15、ion.4. Composition4.1 The manufacturer is given wide latitude in the selection of raw materials and manufacturing processes (see Notes 9.1 and 9.2).4.2 MATERIAL: The coating shall be a homogeneous mixture composed only of coal-tar pitch, solvents, and inert non-water-absorbent mineral filler. The co
16、al-tar pitch used in this coating is defined as a product obtained from the distillation of high-temperature crude coke oven tar, which, in itself, is a product obtained during the destructive distillation of coal in slot ovens operated at a temperature above 700 C (1300 F). The coal-tar pitch shall
17、 be composed primarily of a complex combination of condensed ring aromatic hydrocarbons of three or more members. The coating shall not contain asphalt or asbestos.5. Requirements of Liquid Coating5.1 CONDITION IN CONTAINER: The coating shall be smooth and uniform with a minimum of settling. Any sol
18、vent that separates shall be readily incorporated upon stirring.5.2 FLASH POINT: When tested according to ASTMD92 the flash point shall be a minimum of 35 C (95 F).5.3 DISTILLATION: When tested according to ASTM D20 to a temperature of 235 C (455 F), the coating shall have a residue content of 15 to
19、 30 percent by weight (wt %). The residue from the distillation when tested according to ASTM D5 shall have a penetration value of 5 to 25 mm (0.2 to 1 inch). The residue when tested according to ASTM D36 shall have a softening point of 96 to 116 C (205 to 240 F).5.4 ASH CONTENT: When tested accordi
20、ng to ASTM D3174, the coating shall have an ash content of 15 to 30 wt %2 United Nations Economic Commission for Europe, Transport Division, Palais des Nations, CH - 1211 Geneva 10, Switzerland. Copies of this standard may be obtained from the United Nations Publications Customer Service, National B
21、ook Network, 15200, 15200 NBN Way, Ridge Summit PA 17124 5.5 TAR ACIDS: When tested according to ASTM D453 (distillation to 300 C 570F) the tar acids shall be less than 0.6 mL/100 g. 5.6 WORKING PROPERTIES: The coating shall be designed for application by brush or spray in accordance with the Direct
22、ions for Use (see Section 7.3). When applied to vertical surfaces at specified thickness, the coating shall not sag (see Section 6.1). 6. Laboratory Physical Tests of Applied FilmsUnless otherwise specified herein, or in referenced test methods, properties will be tested at standard atmospheric cond
23、itions as specified in ASTM D3924.6.1 SAG: The coating shall not sag when tested as follows: Press a strip of 2.5 cm (1 inch) masking tape across the full width of two solvent-cleaned 75 x 150 mm (3 x 6 inch) cold-rolled steel panels. The tape shall be parallel to and centered on the shorter axis of
24、 the panel. Apply the material to the panel at a wet film thickness of 760 50 m (30 2 mils) on one panel and to a thickness of 380 25 m (15 1 mil) on the second panel. The application shall be made with a doctor blade according to ASTM D1640. Immediately after applying the material, carefully remove
25、 the masking tape and hang the first panel in a vertical position (with the bare strip horizontal) in a draft-free 23 3 C (73 5 F) location for 24 hours. Hang the second panel at 71 3 C (160 5 F) for 1 hour. At the end of the time periods, sagging or running of the coating into the bare area shall c
26、onstitute failure of the material to pass the sag test.6.2 THERMAL STABILITY: Expose the first coated sag panel (see Section 6.1) to 60 3 C (140 5 F) for 16 hours. Allow the panel to cool at room temperature for one hour, then expose to -23 3 C (-9 5 F) for four hours. The coating shall not loosen,
27、check, crack, peel, run, sag or otherwise lose protective value.6.3 DRY TIME: When tested according to ASTM D1640, a 560 50 m (22 2 mils) wet film thickness shall meet the set-to-touch requirement in less than 6 hours and the dry-to-recoat requirement in less than 24 hours.6.4 ADHESION: Apply 2 coat
28、s of the coating to a wire-brushed, solvent-cleaned (xylene) mild steel panel. Each coat shall have a dry film thickness of 380 25 m (15 1 mil) measured in accordance with SSPC-PA 2, using the protocol given in SSPC-PA 2 Appendix 5. The time between coats shall be 24 hours. Ninety-six hours after ap
29、plication of the second coat, the intercoat adhesion shall be tested according to ASTM D6677. The adhesion value for the coating, both to the bare steel and to itself, shall be 10. 6.5 IMPACT: Apply the coating to two wire-brushed, solvent-cleaned (xylene), mild steel plates, each 150 x 150 x SSPC-P
30、aint 33November 1, 2006 Reaffirmed with editorial revisions June 15, 201533 mm (6 x 6 x 1/8 inch), to a uniform dry film thickness of 760 50 m (30 2 mils). Dry 72 hours, then test each panel separately, coated side up, according to ASTM D2794 using the 15.9 mm (0.625 inch) indenter and 1.13 kg-m (98
31、 inch-pounds) of force. The coating shall exhibit no visible chipping or cracking and shall have firm adhesion outside an area of radius 6.4 mm (1/4 inch) from center of impact.6.6 RESISTANCE TO ALKALI: Apply the coating to a clean glass panel at a uniform dry film thickness of 760 50 m (30 2 mils).
32、 Dry the panel for 24 hours, then suspend vertically in 5 percent sodium hydroxide so that one-half of the coating is immersed. After 30 hours, lightly rub the film with a wet rounded glass rod. The coating shall show no evidence of deterioration.7. Labeling 7.1 Labeling shall conform to the GHS sta
33、ndard.7.2 Technical data shall be provided for at least all data elements categorized as “essential” in SSPC-Guide 13.7.3 DIRECTIONS FOR USE: The following directions for use shall be supplied with each container of coating:Directions for Use of Coal-Tar Mastic, Cold-AppliedThis coating is used to p
34、rovide corrosion protection to steel structures used in underground and underwater services. It will perform best if applied over blast-cleaned steel. When applied to surfaces prepared according to SSPC-SP 1, SSPC-SP 2, or SSPC-SP 3 performance longevity is shortened.Mix coating thoroughly before us
35、e. Under normal conditions, no thinning should be necessary. Thin coating only if necessary, using only solvent recommended by manufacturer.If applied by brush, technique must be developed to ensure application of proper thickness. If coating large areas, spray application is recommended, using eith
36、er high-pressure airless or conventional spray equipment designed for the application of mastics.Apply to the specified film thickness, or, if none is speci-fied, to a minimum of 380 m (15 mils) dry or approximately 540 m (21 mils) wet. The surface to be coated shall be dry; TABLE 1 TEST SUMMARYPROP
37、ERTYREQUIREMENTSTEST METHOD/SECTIONMIN. MAX.Flash Point, C 35 - ASTM D92Distillation to 235C, wt % 15 30 ASTM D20Penetration of distillation residue, mm5 25 ASTM D5Softening point of distillation residue, C96 116 ASTM D36Ash content of coating,mL/100 g15 30 ASTM D3174Tar acids of coating,mL/100 g- 0
38、.6ASTM D453,distillation to 300 CWorkability Satisfactory working and spreading Section 5.6Sag No sag or flow while wet Section 6.1Thermal Stabililty No loosening, checking, cracking, peeling, running, sagging or loss of protective valueSection 6.2DryingSet-to-touch 6 hoursASTM D1640Dry-to-recoat 24
39、 hoursAdhesion 10 ASTM D6677Impact No visible chipping, cracking, or detachment from plate, and firm adhesion outside radius of 1/4 inch (6.4 mm) from center of impactASTM D2794Resistance to alkali No evidence of degradation Section 6.6SSPC-Paint 33November 1, 2006 Reaffirmed with editorial revision
40、s June 15, 20154the surface temperature shall be at least 3 C (5 F) above the dew point. Under normal conditions this coating will dry for recoating or outdoor exposure in 24 to 48 hours, but it will remain soft for long periods. To prevent checking and alligatoring when exposed to sunlight, this co
41、ating must be topcoated with coal-tar emulsion coating meeting SSPC-Paint 32, or other suitable topcoat.8. Disclaimer8.1 While every precaution is taken to ensure that all information furnished in SSPC standards and specifications is as accurate, complete, and useful as possible, SSPC cannot assume
42、responsibility nor incur any obligation resulting from the use of any materials, coatings, or methods specified herein, or of the specification or standard itself.8.2 This specification does not attempt to address problems concerning safety associated with its use. The user of this specification, as
43、 well as the user of all products or practices described herein, is responsible for instituting appropriate health and safety practices and for ensuring compliance with all governmental regulations.9. NotesNotes are not requirements of this standard. 9.1 VOC CONTENT: Each coating, after recommended
44、thinning, must conform to published government regulations regarding volatile organic compound (VOC) content. VOC information should be supplied on the label or the technical data sheet. Various governmental agencies may have different VOC limits or use different methods of testing. The owner may mo
45、dify his specification as necessary to specify a particular VOC content limit consistent with local regulations. Coatings meeting the composition and performance requirements of this specification usually have a VOC level between 240 and 300 g/L (2.0 and 2.5 lb/gal).Copyright SSPC standards, guides,
46、 and technical reports are copyrighted world-wide by SSPC: The Society for Protective Coatings. Any photocopying, re-selling, or redistribution of these standards, guides, and technical reports by printed, electronic, or any other means is strictly prohibited without the express written consent of S
47、SPC: The Society of Protective Coatings and a formal licensing agreement.9.2 The procurement documents should establish the responsibility for samples, testing, and any required affidavit certifying full compliance with the specification.9.3 QUALITY ASSURANCE TESTS: If the user chooses, tests may be
48、 used to determine the acceptability of a lot or batch of a qualified coating. The quality assurance tests are used to determine whether the supplied products are of the same type and quality as those originally tested and certified for acceptance. The selected tests should accurately and rapidly me
49、asure the physical and chemical characteristics of the coating necessary to verify that the supplied material is substantially the same as the previously accepted material. All of the quality assurance tests must be performed on the originally submitted qualification sample. The results of these tests are used to establish pass/fail criteria for quality assurance testing of supplied products.9.3.1 Establishing Quality Assurance Acceptance Criteria: Many ASTM test methods contain precision and bias statements.
