1、SSPC-Paint 30April 1, 2002Editorial Revisionsi November 1, 20046-1151. Scope1.1 This specifi cation covers a group of inorganic zinc primers that can protect carbon steel during the fabrication process, permit welding to specifi cation requirements, and be overcoated.1.2 The major pigment component
2、in this coating is zinc dust and the binder is inorganic.1.3 This specifi cation defi nes the minimum compositional and laboratory performance requirements for characterizing a group of zinc primers. It is to be used in conjunction with SSPC-PS Guide 22.00, SSPC-PS Guide 12.00, and other SSPC specif
3、i cations covering surface preparation, application, thickness, inspection, and safety.2. Description2.1 GENERAL2.1.1 The zinc primers described in this specifi cation consist of zinc dust, an inorganic vehicle, and selected additives, as required.2.1.2 This specifi cation covers inorganic zinc prim
4、ers that are used as weld-through preconstruction primers. Frequently, the primer is applied by an automatic process to steel plate. Once applied, the zinc primer need not be removed. It can be welded through, touched-up, and overcoated prior to being placed in service. If the resultant system will
5、be exposed to acidic (pH 10) immersion, the primer should be removed.2.2 PIGMENTATION2.2.1 The major pigment component in these coatings is zinc dust of the type described in ASTM D 520 (see Note 12.1).2.2.2 Other pigment components may include welding enhancers, curing aids, tinting colors, suspens
6、ion agents, and pot-life control agents.2.3 VEHICLE TYPES: The vehicle shall be an inorganic self-curing silicate, or other material, as described in Section 4.1 (see Note 12.2).3. Referenced Standards3.1 The latest issue, revision, or amendment of the refer-enced standards in effect on the date of
7、invitation to bid shall govern, unless otherwise specifi ed. Standards marked with an asterisk (*) are referenced only in the Notes, which are not requirements of this specifi cation.3.2 If there is a confl ict between the requirements of any of the cited referenced standards and this specifi cation
8、 the requirements of this specifi cation shall prevail.3.3 SSPC STANDARDS AND JOINT STANDARDS:Guide 13 Guide for the Identifi cation and Use of Industrial Coating Systems in Computerized Product DatabasesPA 2 Measurement of Dry Coating Thickness with Magnetic GagesPS Guide 12.00 Guide to Zinc-Rich
9、Coating SystemsPS Guide 22.00 Guide for Selecting One-Coat Preconstruction or Prefabrication Painting SystemsSP 1 Solvent Cleaning SP 10/NACE No. 2 Near-White Blast Cleaning3.4 ASTM INTERNATIONAL STANDARDS:1A 572 Standard Specifi cation for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
10、 A 36 Standard Specifi cation for Carbon Structural Steel B 117 Standard Practice for Operating Salt Spray (Fog) ApparatusD 185 Standard Test Methods for Coarse Particles in Pigments, Pastes, and PaintsD 520 Standard Specifi cation for Zinc Dust Pigment* D 562 Standard Test Method for Consistency o
11、f Paints Measuring Krebs Units (KU) Viscosity Using a Stormer-Type ViscometerSSPC: The Society for Protective CoatingsPAINT SPECIFICATION NO. 30Weld-Through Inorganic Zinc Primer1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.SSPC-Paint 30April 1, 2002Editorial Revision
12、s November 1, 20046-116D 823 Standard Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test PanelsD 1146 Standard Test Method for Blocking Point of Potentially Adhesive Layers* D 1296 Standard Test Method for Odor of Volatile Solvents and Diluents* D 1475
13、 Standard Test Method for Density of Liquid Coatings, Inks, and Related Products * D 1535 Standard Practice for Specifying Color by the Munsell System * D 1640 Standard Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room TemperatureD 1654 Standard Test Method for Evaluatio
14、n of Painted or Coated Specimens Subjected to Corrosive EnvironmentsD 2369 Standard Test Method for Volatile Content of Coatings* D 2371 Standard Test Method for Pigment Content of Solvent-Reducible Paints* D 2621 Standard Test Method for Infrared Identifi cation of Vehicle Solids from Solvent-Reduc
15、ible PaintsD 3278 Standard Test Methods for Flash Point of Liquids by Small Scale Closed Cup ApparatusD 3359 Standard Test Methods for Measuring Adhesion by Tape TestD 3925 Standard Practice for Sampling Liquid Paints and Related Pigmented CoatingsD 4417 Standard Test Methods for Field Measurement o
16、f Surface Profi le of Blast Cleaned Steel* D 5894 Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)3.5 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD:2Z129.1 Hazardous Industrial ChemicalsPrecautionar
17、y Labeling3.6 FEDERAL SPECIFICATIONS AND STANDARDS:3* FED-STD-141 Paint, Varnish, Lacquer and Related Materials: Methods of Inspection, Sampling and Testing Method 3011 Condition in Container4. Composition Requirements4.1 VEHICLE REQUIREMENT4.1.1 The vehicle may consist of water-reducible self-curin
18、g vehicles, including water soluble alkali metal silicates, quaternary ammonium silicates, phosphates, and modifi cations thereof. These coatings dry by evaporation of water and cure by chemical reaction to yield water-insoluble fi lms.4.1.2 The vehicle may consist of solvent-reducible self-curing v
19、ehicles, including ethyl and other organic silicates, polymeric modifi cations of these silicates, and titanates. These systems are dependent upon moisture in the atmosphere to complete hydrolysis to yield an insoluble fi lm.4.1.3 Other organic vehicle components may be included but should constitut
20、e only a minor part of the total vehicle.4.2 TOTAL SOLIDS: The total solids shall be a minimum 55% by weight when measured in accordance with ASTM D 2369.4.3 ZINC REQUIREMENT: The zinc dust shall conform with the requirements of ASTM D 520, and shall constitute a minimum of 65% by weight of the tota
21、l fi lm solids (see Notes 12.1 and 12.3).5. Standard Testing Conditions5.1 TEST PANELS: The hot rolled steel test panels shall conform to ASTM A 572. Panel size shall be 100 x 150 x 3.2 mm (4 x 6 x 1/8 inches) or greater. Test panels shall be solvent cleaned in accordance with SSPC-SP 1 prior to bla
22、st cleaning. The test panels shall be blast cleaned in accordance with SSPC-SP 10 and have a nominal anchor profi le of 25 to 50 micrometers (1.0 to 2.0 mils). The blast profi le shall be measured in accordance with ASTM D 4417, Method C.5.2 APPLICATION: The coating shall be spray-applied as a singl
23、e coat in accordance with the manufacturers written recommendations. 5.3 DRY FILM THICKNESS: The dry fi lm thickness (DFT) shall be 15 to 25 micrometers (0.6 to 1.0 mils). The DFT shall be measured in accordance with the method described in SSPC-PA 2, Appendix 5.5.4 CURE: Before any testing, the coa
24、ting shall be dried and cured in accordance with the manufacturers written recommendations.2American National Standards Institute, 1819 L Street, NW, Suite 600, Washington, DC 20036. Standards downloadable from www.ansi.org.3 FED STD 141 Available from USA Information Systems, Inc. 1092 Laskin Road,
25、 Suite 208, Virginia Beach, Va. 23451. This standard is available on-line from .SSPC-Paint 30April 1, 2002Editorial Revisionsi November 1, 20046-1175.5 SCRIBING: Scribe two parallel lines on the face of the coated panels so as to expose the underlying metal before testing. The lines shall be at leas
26、t 2.5 cm (1 inch) from the edge, the top, and the bottom of each panel and at least 5 cm (2 inches) from each other. Each scribe shall be at least 6 cm (2.4 inches) long. The scribes may run vertically or at an angle across the face of the panel. Follow the scribe-making procedure described in ASTM
27、D 1654.5.6 BACKS AND EDGES: Coat and seal all edges and the back side of each panel with a coating or tape that will provide the necessary protection to these surfaces.6. Requirements of Liquid Coating6.1 MIXING: The components of the primer shall be mixed and dispersed as required to produce a prod
28、uct that is uniform, stable, free from grit, and conforms to the requirements of this specifi cation. After mixing, the coarse particles and skins retained as residue on a standard 60 mesh screen shall be no more than 0.5% by weight of total paint, regardless of type, in accordance with ASTM D 185.6
29、2 POT LIFE: The pot life of the zinc primer, when mixed and ready for application in accordance with the manufacturers written instructions, shall not be exceeded. Pot life with adjust-ments for temperature and humidity shall be provided by the coating manufacturer. Properly mixed and applied mater
30、ial used up to the end of the pot life shall pass the adhesion test described in Section 7.2.6.3 STORAGE LIFE: Neither the vehicle of the multi-component primer nor the ready-mixed primer shall show thickening that is detrimental to performance or application properties. The components or primer sha
31、ll exhibit no curdling, gelling, gassing, or hard caking after being stored unmixed for nine months from the date of manufacture in a tightly sealed, unopened container at a temperature of 4 to 32C (40 to 90F). (See Note 12.4.)6.4 WORKING PROPERTIES: This material is primarily designed for automatic
32、 application by either conventional or airless spraying. The mixed paint shall spray easily to form a continuous fi lm at approximately 20 micrometers (0.8 mils) dry fi lm thickness. The fi lm should show no streaking, running, sagging, or other objectionable features when applied in accor-dance wit
33、h ASTM D 823, Method D, and dried in a vertical position (see Note 12.5).6.5 FLASH POINT: The minimum fl ash point, as determined by ASTM D 3278, should be “none” for inorganic water-based zinc dust coatings, and a minimum of 4.4C (40F) for solvent-based inorganic zinc primers (Type I). 7. Laborator
34、y Physical Tests of Applied Films7.1 MUDCRACKING: The coating, when applied and cured in accordance with Sections 5.2 and 5.4 to a 64 micrometers (2.5 mils) minimum dry fi lm thickness, shall show no signs of mudcracking (see Note 12.6).7.2 ADHESION: The coating, when applied, dried, and cured in ac
35、cordance with Section 5, shall be tested per ASTM D 3359, Method B. There shall be no separation of the coating or delamination of an entire square. The adhesion rating shall be no less than grade 3B.7.3 BLOCKING RESISTANCE: When applied and cured as specifi ed, test panels shall not stick when test
36、ed in accor-dance with ASTM D 1146.7.4 DRYING TIME7.4.1 When applied in accordance with Sections 5.1 through 5.3 and cured at 24C (75F) and 50 to 60% relative humidity, the zinc primer shall dry-to-handle within the time specifi ed in the manufacturers technical data (see Note 12.7).7.4.2 When appli
37、ed at ambient conditions and then dried at 150C (300F), the zinc primer shall dry-to-handle within the time specifi ed in the manufacturers technical data. 7.5 WELDABILITY: Weldability requirements shall be determined by specifi c contract requirements. The primer shall not be removed in the path of
38、 the welds. Reference to double fi llet weld test has been deleted in this revision. Generally, 9.5 mm thick x 150 mm wide x 0.6 m long (3/8 inches thick x 6 inches wide x 2 feet long) steel plates may be used. Actual plate sizes and thicknesses shall be determined by the specifi c process to be qua
39、lifi ed. Weld quality inspections and fi nal acceptance of the welding procedure shall be in accordance with either the AWS Structural Welding Code D1.1, or as defi ned in the contract specifi cation.7.6 RECOATABILITY: This primer, when applied over properly prepared steel surfaces, shall be compati
40、ble with the specifi ed adjacent coating (i.e., intermediate coat or topcoat).8. Accelerated Laboratory Weathering Test8.1 SALT FOG EXPOSURE TEST: Triplicate panels prepared per Section 5 shall be exposed in a salt fog cabinet in accordance with ASTM B 117 for 750 hours. There shall be no blistering
41、 or rusting of the coated portion, and no undercutting at the scribe, on any test panel. Slight rusting in the scribe mark will be permissible, and resulting staining should be ignored. Strips 6 mm (1/4 inch) wide along the edges of the panel may be ignored (see Notes 12.8 and 12.9).SSPC-Paint 30Apr
42、il 1, 2002Editorial Revisions November 1, 20046-1189. Labeling9.1 Labeling shall conform to ANSI Z129.1.9.2 Technical data shall be provided for at least all data elements categorized as “essential” in SSPC-Guide 13.10. Inspection10.1 All materials supplied under this specifi cation shall be subject
43、 to timely inspection by the purchaser or his authorized representative. The purchaser shall have the right to reject any materials supplied that are found to be defective under this specifi cation (see Notes 12.10 and 12.11). In case of dispute, unless otherwise specifi ed, the arbitration or settl
44、ement procedure, if any, established in the procurement documents shall be followed. If no arbitration or settlement procedure is established, then a procedure mutually agreeable to the purchaser and material supplier shall be used. 10.2 Samples of vehicle or pigment or mixed paint may be requested
45、by the purchaser and shall be supplied upon request, along with the manufacturers name and identifi ca-tion for the materials. Samples may be requested at the time the purchase order is placed or may be taken from unopened containers at the job site.10.3 Unless otherwise specifi ed, the sampling and
46、 testing shall be in accordance with ASTM D 392511. Disclaimer11.1 While every precaution is taken to ensure that all information furnished in SSPC standards and specifi cations is as accurate, complete, and useful as possible, SSPC cannot assume responsibility nor incur any obligation resulting fro
47、m the use of any materials, coatings, or methods specifi ed herein, or of the specifi cation or standard itself.11.2 This specifi cation does not attempt to address prob-lems concerning safety associated with its use. The user of this specifi cation, as well as the user of all products or practices
48、described herein, is responsible for instituting appropriate health and safety practices and for ensuring compliance with all governmental regulations.12. NotesNotes are not a requirement of this specifi cation.12.1 LEAD LEVEL IN ZINC DUST: ASTM D 520 speci-fi es three types of zinc dusts for use as
49、 pigments in coatings. Type I is a general grade in which no maximum level of lead is specifi ed. Type II is a high-purity grade with a maximum lead level of 0.01% by weight. Type III is the highest purity grade, with a maximum lead level of 0.002% by weight. Any grade of zinc dust can be used in the zinc coatings covered by this specifi cation. However, it is important to note that if Type I zinc is used, it is possible to exceed the permissible exposure limit (PEL) for lead when the products are removed by abrasive blasting. For additional information relating t
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