1、 Item No. 21100 Joint Standard NACE No. 12/AWS C2.23M/SSPC-CS 23.00 Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum, Zinc, and Their Alloys and Composites for the Corrosion Protection of Steel This NACE International (NACE)/American Welding Society (AWS)/SSPC: T
2、he Society for Protective Coatings standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. It is intended to aid the manufacturer, the consumer, and the general public. Its acceptance does not in any respect preclude anyone, whether he
3、has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not addressed in this standard. Nothing contained in this NACE/AWS/SSPC standard is to be construed as granting any right, by implication or otherwise, to manufacture, sell, or use
4、 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 current technology and should in no way be interpreted as a restriction on the use of better procedu
5、res 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, AWS, and SSPC assume no responsibility for the interpretation or use of this standard by other partie
6、s and accept responsibility for only those official interpretations issued by NACE, AWS, or SSPC in accordance with their governing procedures and policies which preclude the issuance of interpretations by individual volunteers. Users of this NACE/AWS/SSPC standard are responsible for reviewing appr
7、opriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE/AWS/SSPC standard may not necessarily address all potential health and safety problems or environmental hazards associated with the use of
8、materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE/AWS/SSPC standard are also responsible for establishing appropriate health, safety, and environmental protection practices, in consultation with appropriate regulatory authorities if necessary, t
9、o achieve compliance with any existing applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE/AWS/SSPC standards are subject to periodic review, and may be revised or withdrawn at any time without prior notice. The user is cautioned to obtain the latest edition
10、. NACE, AWS, and SSPC require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication. Approved July 2003 ISBN 0-87171-713-1 2003, NACE International, American Welding Society, and SSPC: The Society for Protective Coatings An
11、American National Standard Approved March 2003 NACE International 1440 South Creek Drive Houston, TX 77084-4906 (telephone +1 281/228-6200) American Welding Society 550 NW LeJeune Road Miami, FL 33126 (telephone +1 800-443-9353) SSPC: The Society for Protective Coatings 40 24th Street, Sixth Floor P
12、ittsburgh, PA 15222-4656 (telephone +1 412/281-2331) Printed by NACE InternationalNACE No. 12/AWS C2.23M/SSPC-CS 23.00 NACE International i _ Foreword This “Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum, Zinc, Their Alloys, and Composites for the Corrosion Pro
13、tection of Steel” is issued to meet a critical industry and government need. Thermal spray coatings (TSCs) are used extensively for the corrosion protection of steel and iron in a wide range of environments. The corrosion tests carried out by the American Welding Society(1)and the marine-atmosphere
14、performance reports of ASTM(2)and the LaQue Center for Corrosion Technology(3)confirm the effectiveness of flame-sprayed aluminum and zinc coatings over long periods of time in a wide range of hostile environments. The British Standards Institution “Code of Practice for the Corrosion Protection of S
15、teel”(4)specifies that only TSCs give protection for more than 20 years to first maintenance for the 19 industrial and marine environments considered and that only sealed, sprayed aluminum or zinc gives such protection in seawater immersion or splash zones. This standard may be used by owners, and d
16、esign, fabrication, and maintenance engineers to detail and contract for the application of TSCs for the preservation and maintenance of steel structures. This standard may also be used by TSC inspectors and TSC applicators to develop and maintain application procedures, equipment inventory, and an
17、operator-training program. This standard presents the basic need-to-know information for the application of quality TSCs. Appendixes present amplifying information. The Table of Contents gives an overview of this standard and may be used to find specific information. This standard was prepared by th
18、e AWS C2B Subcommittee on Thermal Spray Coatings for Corrosion Protection, SSPC C.1.2.B Committee on Thermal Spraying, and NACE Task Group (TG) 146 on Thermal Spray Coatings. TG 146 is administered by Specific Technology Group (STG) 02 on Protective Coatings and LiningsAtmospheric, and is sponsored
19、by STG 39 on Process IndustryMaterials Applications. _ _ (1)AWS C2.14-74, “Corrosion Tests of Flame-Sprayed Coated Steel, 19-Year Report” (Miami, FL: AWS). AWS standards can be obtained from Global Engineering, 15 Inverness Way East, Engelwood, CO 80112-5776, Telephone (800)-854-7179, Fax (303) 307-
20、2740, Internet (2)R.M. Kain, E.A. Baker, “Marine Atmospheric Corrosion Museum Report on the Performance of Thermal Spray Coatings on Steel,” ASTM STP 947 (West Conshohocken, PA: ASTM, 1987). Available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. (3)S.J. Pikul, “Appea
21、rance of Thermal Sprayed Coatings After 44 Years Marine Atmospheric Exposure at Kure Beach, North Carolina,” LaQue Center for Corrosion Technology, Inc, February 1996. Available from the LaQue Center for Corrosion Technology, Inc., 702 Causeway Drive, Wrightsville Beach, NC 28480. (4)BS 5493, “Code
22、of Practice for Protective Coatings of Iron and Steel Structures Against Corrosion” (London, UK: British Standards Institution). Available from the American National Standards Institute (ANSI), 11 West 42ndStreet, New York, NY 10036-8002, USA; and the British Standards Institution (BSI), British Sta
23、ndards House, 389 Chiswick High Rd., London W4 4AL, UK. NACE No. 12/AWS C2.23M/SSPC-CS 23.00 ii NACE International _ Joint Standard NACE No. 12/AWS C2.23M/SSPC-CS 23.00 Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum, Zinc, and Their Alloys and Composites for th
24、e Corrosion Protection of Steel Contents 1. General . 1 2. Referenced Documents 2 3. Definitions . 2 4. Summary of Practice. 4 5. Surface Finish Requirements 4 6. TSC Requirements 4 7. TSC Application Procedure. 8 8. TSC Application 9 9. Application of Sealers and Topcoats 10 10. Records. 11 11. Deb
25、ris Containment and Control. 11 12. Work Procedures and Safety 11 13. Documentation 11 14. Contract Pre-Award Evaluation, Demonstration, and Validation 12 15. TSC Applicator Warranty 12 Further Reading 13 Appendix A: Model Procurement Specification . 14 Appendix B: Model Job Control Method 21 Append
26、ix C: Procedure for Calibration of Portable Test Instruments to the ASTM C 633 Test Method 23 Appendix D: Application Process Method . 24 Figure 1: Thermal Spray Coating Process 1 Figure 2: Job Reference Standard Illustration . 3 Figure 3: Line and Spot Measurements 6 Figure 4: TSC Bend Test: Pass a
27、nd Fail Samples 8 Figure 5: Thickness and Tensile-Bond Measurements for JRS Qualifications . 12 Figure C1: Calibration Fixture 24 Figure D1: Key Production and Quality Control Checkpoints (QCCPs) for Applying Thermal Spray Coatings . 25 Figure D2: Proper Spray Gun Adjustment. 30 Figure D3: Line and
28、Spot Measurements 30 Table 1: TSC System Requirements and Acceptance Tests 5 Table 2: Blasting Media and Mesh Size Found Suitable for TSCs on Steel Substrates. 6 Table 3: Minimum Tensile Bond Requirements. 7 Table 4: Bend-Test Cracking Threshold: Mandrel Diameter vs. TSC Thickness 7 Table D1: Flame-
29、 and Arc-Spray Standoff Distances and Spray Widths, Nominal. 28 _ NACE No. 12/AWS C2.23M/SSPC-CS 23.00 NACE International 1 _ Section 1: General 1.1 General This standard is a procedure for the application of metallic thermal spray coating (TSC) of aluminum, zinc, and their alloys and composites for
30、 the corrosion protection of steel. Required equipment, application procedures, and in-pro-cess quality control (QC) checkpoints are specified. This standard may be used as a procurement document. Ap-pendix A presents a fill-in-the-blanks model procurement specification. The flow diagram in Figure 1
31、 provides an overview of the thermal spray coating process presented in this standard. Figure 1: Thermal Spray Coating Process Not included in this standard are requirements for design and fabrication, thermal spray equipment qualification, coat-ing selection, and operator and inspector certificatio
32、n. For successful thermal spray application, the steel structure and components should be designed and fabricated according to NACE Standard RP0178.(5)Additional consideration should be given to weldments whose oxyfuel cut edges may affect hardness which may preclude adequate profile depth. 1.2 Safe
33、ty The basic precautions for thermal spraying are essentially the same as for welding and cutting. Information on safety can be found in the Safety Chapter in AWS Thermal Spray-ing: Practice, Theory, and Application; ANSI Z49.1, Safety in Welding, Cutting; and Allied Processes; and NFPA 58,(6)Standa
34、rd for the Storage and Handling of Liquefied Petro-leum Gases. Safety precautions can also be found in the manufacturers equipment technical instructions and manu-als and the feedstock Material Safety Data Sheet. This standard may involve hazardous materials, operations, and equipment. This standard
35、 does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appro-priate safety and health practices and determine the applic-ability of regulatory limitations prior to use. Potential thermal spraying hazards inc
36、lude exposure to vapors, dust, fumes, gases, noise (from the spray gun), and arc ultraviolet (UV) radiation. Additionally, improperly used thermal spray equipment can create potential fire and explo-sion hazards from the fuel and carrier gases and a potential electrical shock hazard from the electri
37、cal and electronic equipment and charged wire spools. To minimize hazards, proper safety precautions shall be followed. Operators shall comply with the procedures in the safety references, the manufacturers technical manuals, and the material safety data sheets. Thermal spraying can be a completely
38、safe process when performed by an operator who follows the recommended precautionary measures, has a proper understanding of thermal spraying practices, and has knowledge, skill, and exercises care in using thermal spray equipment. 1.3 Units of Measure This specification makes use of both the Intern
39、ational Sys-tem (SI) and U.S. Customary units. The measurements are not exact equivalents; therefore each system must be used independently of the other without combining in any way. _ (5)NACE standards can be obtained from NACE International, 1440 South Creek Drive, Houston, TX 77084-4906. (6)Avail
40、able from the National Fire Protection Association (NFPA), 1 Batterymarch Park, P.O. Box 9101, Quincy, MA 02269-9101. Sealer or Sealer and Topcoat Application NACE No. 12/AWS C2.23M/SSPC-CS 23.00 2 NACE International The specification ANSI/AWS C2.23M/NACE No. 12/SSPC-CS 23.00 uses SI units. U.S. Cus
41、tomary units are shown in appropriate columns in tables or within parentheses when used in the text. Suitable conversions encompassing stand-ard sizes of both can be made, however, if appropriate tolerances are applied in each case. _ Section 2: Referenced Documents The following standards contain p
42、rovisions which, through reference in this text, constitute provisions of this AWS/ NACE/SSPC standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this AWS/NACE/SSPC standard are encouraged to inves
43、tigate the possibility of applying the most recent editions of the documents shown below. For undated references, the latest edition of the standard referred to applies ASTM B 833, Standard Specification for Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing)(7) ASTM C 633, Standard Test Met
44、hod for Adhesion or Cohe-sive Strength of Flame-Sprayed Coatings ASTM D 4285, Method for Indicating Oil or Water in Com-pressed Air ASTM D 4417, Standard Test Methods for Field Measure-ment of Surface Profile of Blast Cleaned Steel ASTM D 4541, Standard Test Method for Pull-Off Strength of Coatings
45、Using Portable Adhesion Testers ASTM D 4940, Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blasting Abrasives. ASTM E 3, Standard Practice for Preparation of Metallo-graphic Examination ANSI/AWS C2.18, Guide for the Protection of Steel with Thermal Sprayed
46、Coatings of Aluminum and Zinc and Their Alloys and Composites ANSI/AWS C2.25/C2.25M, Specification for Solid and Com-posite Wires, and Ceramic Rods for Thermal Spraying ISO 8502-3, Preparation of steel substrates before applica-tion of paints and related productsTests for the assess-ment of surface
47、cleanlinessPart 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)(8)NACE No. 1/SSPC-SP 5, White Metal Blast Cleaning NACE No. 2/SSPC-SP 10, Near-White Metal Blast Cleaning NACE Standard RP0178, Fabrication Details, Surface Fin-ish Requirements, and Proper
48、 Design Considerations for Tanks and Vessels to Be Lined for Immersion Service NACE Standard RP0287, Field Measurement of Surface Profile of Abrasive Blast Cleaned Steel Surfaces Using a Replica TapeSSPC-AB 1, Mineral and Slag Abrasive(9) SSPC-AB 2, Specification for Cleanliness of Recycled Fer-rous Metallic Abrasives SSPC-AB 3, Newly Manufactured or Remanufactured Steel Abrasives
