1、NACE Standard TM0204-2004 Item No. 21244 Stan da rd Test Method Exterior Protective Coatings for Seawater Immersion Service This NACE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does not in any r
2、espect preclude anyone, whether he or she has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with this standard. Nothing contained in this NACE International standard is to be construed as granting any right, by
3、implication or otherwise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents minimum requirements and should in no way be i
4、nterpreted as a restriction on the use of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NACE International assumes no responsibility for th
5、e interpretation or use of this standard by other parties and accepts responsibility for only those official NACE International interpretations issued by NACE International in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteer
6、s. Users of this NACE International standard are responsible for reviewing appropriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE International standard may not necessarily address all poten
7、tial health and safety problems or environmental hazards associated with the use of materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE International standard are also responsible for establishing appropriate health, safety, and environmental prot
8、ection practices, in consultation with appropriate regulatory authorities if necessary, to achieve compliance with any existing applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may be revised or
9、withdrawn at any time. NACE International requires that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication. The user is cautioned to obtain the latest edition. Purchasers of NACE International standards may receive current inf
10、ormation on all standards and other NACE International publications by contacting the NACE International Membership Services Department, 1440 South Creek Drive, Houston, Texas 77084-4906 (telephone +I 281 228-6200). Approved 2004-1 1-15 NACE International 1440 South Creek Drive Houston, Texas 77084-
11、4906 +I (281) 228-6200 ISBN 1-57590-1 90-0 02004, NACE International TM0204-2004 Foreword Exterior surfaces of submerged offshore platorm steel structures, piers, docks, pilings, subsea valves, and wellheads are normally protected by sacrificial anodes. To reduce the consumption of sacrificial anode
12、s, the exterior surfaces of submerged steel can be coated with protective coatings before their subsea installation, and the coatings are not expected to be repaired afterwards. The purpose of this standard is to specify test methods to evaluate coating systems for seawater immersion services. This
13、standard is intended for use by facility owners and coatings manufacturers. This standard test method was prepared by NACE Task Group (TG) 264 on Offshore Exterior Submerged Coatings: Standard Test Method. This TG is administered by Specific Technology Group (STG) 03 on Coatings and Linings, Protect
14、ive: Immersion and Buried Service. It is also sponsored by STG 33 on Oil and Gas Production-Nonmetallics and Wear Coatings (Metallic). This standard is issued by NACE International under the auspices of STG 03. In NACE standards, the terms shall, must, should, and may are used in accordance with the
15、 definitions of these terms in the NACE Publications Style Manual, 4th ed., Paragraph 7.4.1.9. Shall and must are used to state mandatory requirements. The term should is used to state something good and is recommended but is not mandatory. The term may is used to state something considered optional
16、. NACE International I TM0204-2004 NACE International Stand a rd Test Method Exterior Protective Coatings for Seawater I m mersion Service Contents 1 1 1 4. Test Soluti 2 2 3 7. Cathodic Disbondment 3 8. Seawater Immersion R 4 9. Dimensional Stability Te 5 IO. Aging Stability Test 5 11. Edge-Retenti
17、on Tes 6 References 7 Figure 1 : 90“ Angle Aluminum Bar for the Edge-Retention Test 6 Table 1 : Fingerprinting of Coating Materials . 1 Table 2: Test Specimen Geometry, Size, Substrate Material, and Minimum Quantity 2 II NACE International TM0204-2004 Section 1: General 1 .I This standard test metho
18、d covers exterior protective 1.2 The entire test time is only 12 weeks. Five test coatings for offshore platorm steel structures, piers, docks, methods-including cathodic disbondment, seawater pilings, subsea valves, and wellheads at normal seawater immersion resistance, dimensional stability, aging
19、 stability, temperature. If the steel temperature is much higher than and edge retention-are used to evaluate coating systems. the seawater temperature, higher test temperatures shall be used. Section 2: Definitions Cathodic Disbondment: The destruction of adhesion through laboratory analyses of coa
20、ting density, solids between a coating and the coated sutface caused by content, pigment content, etc. Infrared (IR) spectroscopy is products of a cathodic reaction. often used in the analyses. Coating System: The complete number and types of coats applied to a substrate in a predetermined order. Ro
21、om Temperature: A temperature generally between 20 and 25C (68 and 77F). Edge Retention: The ratio of dry-film thickness (DFT) of Submerged: The part of an offshore structure that is the entire multicoat coating system at peak to average DFT on both flat sutfaces of a sharp angle bar, used as a meas
22、ure of a coating?s ability to retain film coverage over Synthetic Seawater: An aqueous solution containing sharp corners. inorganic salts in proportions and concentrations representative of ocean water (also known as ?substitute Fingerprinting: Method of identifying a coating material ocean water?).
23、 constantly immersed in seawater. Section 3: Coating Materials 3.1 General testing, the manufacturer shall provide the following information. This information shall be included as part of The coating system petformance shall pass the acceptance the test report. criteria specified by facility owners
24、according to their specific requirements. If the coating formulation is changed after the (1) Product data sheet qualification test, the new coating system shall be requalified according to the latest revision of the standard. 3.2 Required Product Information (3) Fingerprinting-The requirements for
25、fingerprinting for each coat of the multilayer coating system are listed in When each coating system is submitted to qualification Table 1. (2) Material safety data sheet (MSDS) Table 1 : Fingerprinting of Coating Materials Property Component Standard Density Part A and B, each component ASTM?A? D 1
26、475? Solids content by weight ASTM D 236g2 Pigment content by weight ASTM D 23723 Fourier transform infrared-attenuated Part A and B, each component Equipment total reflection (FTIR-ATR) scan with man ufactu rer?s pigment, or instruction Mixed Parts A and B Part A and B, each component infrared (IR)
27、 scan without pigment Part A and B, each component ASTM D 26214 TA) ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. NACE International 1 TM0204-2004 If the fingerprinting test is conducted by the supplier, the test results shall be certified by the manufacturers quality assur
28、ance/quality control manager or the senior technical manager. (4) All of the following information: Manufacturers name Address Telephone/fax numbers Sutface preparation standard (NACE, SSPC,“ IS0,2 etc.) Anchor profile (pm or mil) For each coat of the coating system, the following information shall
29、also be provided: Product name Color Material type Batch number, Part A and B Manufacturing date Shelf life Volatile organic compounds (VOCs), (g/L or Ib/gal) Cleaning solvent Thinner type Maximum percentage of thinner content by volume Mixing ratio by volume or weight Application method Application
30、 temperature range (“C or OF) Application humidity range (% R.H.) Pot life (hourstem peratu re) Induction time (minutes) Minimum recoat and dry-to-touch time (hou rstem peratu re) Maximum recoat time (daystemperature) Percentage of solids content by volume Wet-film thickness (WFT) range (pm or mil)
31、Dry-film thickness (DFT) range (pm or mil) Section 4: Test Solution Synthetic seawater used in several of the test methods in this standard shall be prepared with the sea salt chemical composition in accordance with ASTM D 1141.5 The minute concentration of heavy metals is not required to prepare th
32、e synthetic seawater. Commercial-grade sea salts may be used instead of reagent-grade sea salts to prepare the synthetic seawater. Section 5: Test Specimens 5.1 Test Specimen Geometry, Size, Substrate Material, The steel panels shall be grit blasted to a white-metal finish and Minimum Quantity (NACE
33、 No. l/SSPC-SP 56 or IS0 8501-17 Sa 3). Table 2 lists the specified test specimen geometry, size, substrate material, and the minimum quantity of test specimens for each test method. Extra coated test Anchor profile on all steel panels shall be as specified by specimens should be prepared in case a
34、repeat test is the coating manufacturer. If not specified, the anchor profile needed later. shall be 40 to 75 pm (1.5 to 3.0 mil) as measured with a replica tape in accordance with NACE Standard RP0287. 5.2 Sutface Preparation 5.3 Anchor Profile Table 2: Test Specimen Geometry, Size, Substrate Mater
35、ial, and Minimum Quantity Test Method Test Speciman Geometry and Size Substrate Minimum Material Quantity Cathodic Disbondment 76 x 150 x 4.75-mm (3.0- x 6.0- x 0,188-in.) ASTM A 36 2 panel steel Seawater Immersion Resistance panel steel Aging Stability 150 x 25 x 3.18-mm (6.0- x 1.0- x 0.125-in.) C
36、arbon steel 12 76 x 150 x 4.75-mm (3.0- x 6.0- x 0,188-in.) ASTM A 36 2 Dimensional Stability 76 x 25-mm (3.0- x 1 .O-in.) free film HDPE) 3 panel 3.18 mm (0.75 x 0.75 x 0.125 in.) Edge Retention 90“ angle bar, 150 mm (6.0 in.) long, 19 x 19 x Aluminum 3 (A) High-density polyethylene. (I) SSPC: The
37、Society for Protective Coatings, 40 24th Street, 6th Floor, Pittsburgh, PA 15222-4656. International Organization for Standardization (ISO), 1 rue de Varernb, Case postale 56, CH-I21 1 Geneva 20, Switzerland. 2 NACE International TM0204-2004 5.4 A welding rod 3.18 mm (0.125 in.) in diameter and 76 m
38、m (3.0 in.) in length should be welded to the center of one of the 76-mm (3.0411.) sides of each steel panel to suspend the panel in the air so that the entire panel can be coated at one time. Other techniques to spray all sides of a panel may also be used. Section 6: Coating Application 6.1 All coa
39、tings shall be well mixed with Part NB ratio as humidity at the time of coating application shall be recorded. specified by the manufacturers. Each coat of the coating Each coat of the coating system shall be applied with the system shall be applied to the substrate material with the DFT specified b
40、y the coating manufacturer. After the specified DFT, using conventional air, airless, or plural- coating system has cured, DFT measurements shall be component spray, whichever is specified by the facility made in five locations on each test specimen, and an owner. average DFT shall be determined. 6.
41、2 The application method, temperature, and relative 6.3 All coating systems shall be allowed to cure at room temperature for at least one week before testing. Section 7: Cathodic Disbondment Test 7.1 Test Specimen Preparation All six sides of the steel panels shall be coated with the coating system.
42、 After the coating system has cured for at least one week, a flat-head drill bit shall be used to drill a 3.18-mm (0.125-in.) diameter holiday through the coating system in the center on each side of the test specimen. The holiday shall be deep enough to expose the bare steel and shall be cleaned wi
43、th compressed air without debris left in the holiday. acceptable methods, either attaching a galvanic zinc anode to each coated test specimen immersed in the synthetic seawater, or by using impressed current. If zinc anodes are used, the anode sutface shall be abraded to make sure the sutface is act
44、ive. For the impressed current method, synthetic seawater shall be used instead of the 3 wt% mixed-salt solution. A single DC power supplier shall be used to provide the -1.0 (+O/-0.1) V DC electrical potential to the test specimens with reference to a standard calomel electrode. 7.2 Test Procedure
45、7.2.2 After 12 weeks, the test specimens shall be removed from the synthetic seawater. After the 7.2.1 A modified ASTM G 8” procedure shall be used removal of loose coating, the radial disbondment shall to measure the cathodic disbondment of the coating be measured. The radial disbondment shall be s
46、ystem. The test shall be done by one of two calculated using Equation (1). The average radial disbondment value from the edge of the holiday shall be calculated over the four holidays for two test specimens. average disbondment length - holiday size 2 Radial disbondment = 7.2.3 Blister formation sha
47、ll be measured in (2) Average cathodic disbondment value of the four accordance with ASTM D 714.” h o1 idays ; 7.3 Test Report (3) coated test specimens; Average coating system DFT on each side of the The following information shall be recorded: (4) Synthetic seawater temperature; and (1) Radial cat
48、hodic disbondment for each holiday; (5) Anode material and reference electrode. NACE International 3 TM0204-2004 Section 8: Seawater Immersion Resistance Test The seawater immersion resistance shall be measured using one of the two following methods: 8.1 8.2 Method A-Pull-Off Adhesion Test 8.1 .I Te
49、st Specimen Preparation All six sides of the steel panels shall be coated with the coating system. No holidays shall be drilled on the test specimens. 8.1.2 Test Procedure 8.1.2.1 After the coating system has cured at room temperature for at least one week, the test specimens shall be immersed in synthetic seawater at 40 k2“C (104 k4OF) for 12 weeks. The test specimens shall not touch each other. 8.1.2.2 The pull-off adhesion test shall be conducted in accordance with ASTM D 4541“ within 8 hours after the test specimens are removed from the synthetic seawater. Immediately a
