1、AWS C2.20/C2.20M:2016An American National StandardSpecification forThermal SprayingZinc Anodes onSteel ReinforcedConcreteAWS C2.20/C2.20M:2016An American National StandardApproved by theAmerican National Standards InstituteMay 19, 2016Specification forThermal Spraying Zinc Anodeson Steel Reinforced
2、Concrete2nd EditionSupersedes AWS C2.20/C2.20M:2002Prepared by theAmerican Welding Society (AWS) C2 Committee on Thermal SprayingUnder the Direction of theAWS Technical Activities CommitteeApproved by theAWS Board of DirectorsAbstractThis AWS standard is a specification for thermal spraying zinc ano
3、des on steel reinforced concrete. This standard is for-matted as an industrial process instruction. The scope includes: job description, safety, pass/fail job reference standards,feedstock materials, equipment, a step-by-step process instruction for surface preparation, thermal spraying, and quality
4、control. There are five annexes, including job control record and portable adhesion testing.iiAWS C2.20/C2.20M:2016ISBN: 978-0-87171-888-4 2016 by American Welding SocietyAll rights reservedPrinted in the United States of AmericaPhotocopy Rights. No portion of this standard may be reproduced, stored
5、 in a retrieval system, or transmitted in anyform, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copy-right owner.Authorization to photocopy items for internal, personal, or educational classroom use only or the internal, personal, oreducati
6、onal classroom use only of specific clients is granted by the American Welding Society provided that the appro-priate fee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, tel: (978) 750-8400;Internet: .iiiAWS C2.20/C2.20M:2016Statement on the Use of American Welding
7、Society StandardsAll standards (codes, specifications, recommended practices, methods, classifications, and guides) of the AmericanWelding Society (AWS) are voluntary consensus standards that have been developed in accordance with the rules of theAmerican National Standards Institute (ANSI). When AW
8、S American National Standards are either incorporated in, ormade part of, documents that are included in federal or state laws and regulations, or the regulations of other governmen-tal bodies, their provisions carry the full legal authority of the statute. In such cases, any changes in those AWS st
9、andardsmust be approved by the governmental body having statutory jurisdiction before they can become a part of those lawsand regulations. In all cases, these standards carry the full legal authority of the contract or other document that invokesthe AWS standards. Where this contractual relationship
10、 exists, changes in or deviations from requirements of an AWSstandard must be by agreement between the contracting parties.AWS American National Standards are developed through a consensus standards development process that bringstogether volunteers representing varied viewpoints and interests to ac
11、hieve consensus. While AWS administers the pro-cess and establishes rules to promote fairness in the development of consensus, it does not independently test, evaluate,or verify the accuracy of any information or the soundness of any judgments contained in its standards.AWS disclaims liability for a
12、ny injury to persons or to property, or other damages of any nature whatsoever, whetherspecial, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or relianceon this standard. AWS also makes no guarantee or warranty as to the accuracy or complete
13、ness of any information pub-lished herein.In issuing and making this standard available, AWS is neither undertaking to render professional or other services for oron behalf of any person or entity, nor is AWS undertaking to perform any duty owed by any person or entity to someoneelse. Anyone using t
14、hese documents should rely on his or her own independent judgment or, as appropriate, seek theadvice of a competent professional in determining the exercise of reasonable care in any given circumstances. It isassumed that the use of this standard and its provisions is entrusted to appropriately qual
15、ified and competent personnel.This standard may be superseded by new editions. This standard may also be corrected through publication of amend-ments or errata, or supplemented by publication of addenda. Information on the latest editions of AWS standards includ-ing amendments, errata, and addenda i
16、s posted on the AWS web page (www.aws.org). Users should ensure that theyhave the latest edition, amendments, errata, and addenda.Publication of this standard does not authorize infringement of any patent or trade name. Users of this standard acceptany and all liabilities for infringement of any pat
17、ent or trade name items. AWS disclaims liability for the infringement ofany patent or product trade name resulting from the use of this standard.AWS does not monitor, police, or enforce compliance with this standard, nor does it have the power to do so.Official interpretations of any of the technica
18、l requirements of this standard may only be obtained by sending a request,in writing, to the appropriate technical committee. Such requests should be addressed to the American Welding Society,Attention: Managing Director, Technical Services Division, 8669 NW 36 St, # 130, Miami, FL 33166 (see Annex
19、C).With regard to technical inquiries made concerning AWS standards, oral opinions on AWS standards may be rendered.These opinions are offered solely as a convenience to users of this standard, and they do not constitute professionaladvice. Such opinions represent only the personal opinions of the p
20、articular individuals giving them. These individualsdo not speak on behalf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpretations ofAWS. In addition, oral opinions are informal and should not be used as a substitute for an official interpretation.This standa
21、rd is subject to revision at any time by the AWS C2 Committee on Thermal Spraying. It must be reviewedevery five years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommendations, additions,or deletions) and any pertinent data that may be of use in improving this standa
22、rd are requested and should be addressedto AWS Headquarters. Such comments will receive careful consideration by the AWS C2 Committee on Thermal Spray-ing and the author of the comments will be informed of the Committees response to the comments. Guests are invited toattend all meetings of the AWS C
23、2 Committee on Thermal Spraying to express their comments verbally. Procedures forappeal of an adverse decision concerning all such comments are provided in the Rules of Operation of the TechnicalActivities Committee. A copy of these Rules can be obtained from the American Welding Society, 8669 NW 3
24、6 St,# 130, Miami, FL 33166.This page is intentionally blank.ivAWS C2.20/C2.20M:2016vAWS C2.20/C2.20M:2016PersonnelAWS C2 Committee on Thermal SprayingK. L. Sender, Chair Oerlikon Metco (US), IncorporatedW. J. Arata, Vice Chair Carpenter Powder ProductsJ. M. Rosario, Secretary American Welding Socie
25、tyD. M. Beneteau CenterLine (Windsor) Ltd.C. C. Berndt Swinburne University of TechnologyM. M. Blasingame Superior Shot Peening, IncorporatedT. J. Connelly Green Belting Industries, Ltd.A. Duminie HC Starck North American Trading, LLCM. Froning The Boeing CompanyD. T. Haegele Select ArcD. C. Hayden
26、Hayden CorporationJ. O. Hayden Hayden CorporationN. M. Karinchak Platt BrothersI. R. Lasa Florida Department of TransportationD. A. Lee Kennametal, IncorporatedW. M. Medford INSPEC, IncorporatedD. R. Moody Plasma Powders and SystemsB. Mosier Polymet CorporationJ. Ryan Carpenter Powder ProductsK. Sam
27、path Chart IndustriesC. Sauer NAVAIRA. P. Yanski Praxair TAFAAdvisors to the AWS C2 Committee on Thermal SprayingR. Ahmed Patronas Carigali Sdn Bhd.B. T. Costello NAVSEAM. R. Dorfman Oerlikon Metco (US), IncorporatedL. F. Grimenstein Nation Coating Systems, IncorporatedA. J. Grubowski DDL OMNID. Gui
28、llen Idaho National LaboratoryJ. A. Kapur Bay State Surface TechnologiesA. Roy Quality Calibration and ConsultingS. Szapra Naval Surface Warfare CenterC. Tudor International MetalFusion CorporationT. H. Via Via TechnologiesM. Weinstein Wall Colmonoy CorporationAWS C2C Subcommittee on Thermal Sprayed
29、 Coatings for Reinforced ConcreteI. R. Lasa, Chair Florida Department of TransportationJ. M. Rosario, Secretary American Welding SocietyM. L. Berndt Aurecon AustraliaJ. M. Brodar Salt River ProjectJ. Costa Structural TechnologiesviAWS C2.20/C2.20M:2016N. M. Karinchak Platt BrothersD. A. Lee Kennamet
30、al, IncorporatedD. G. Tepke SKA Consulting Engineers, IncorporatedAdvisors to the AWS C2C Subcommittee on Thermal Sprayed Coatings for Reinforced ConcreteJ. O. Hayden Hayden CorporationF. S. Rogers Thermion, IncorporatedA. P. Yanski Praxair TAFAAWS C2C Subcommittee on Thermal Sprayed Coatings for Re
31、inforced Concrete (Continued)viiAWS C2.20/C2.20M:2016ForewordThis foreword is not part of this standard but is included for informational purposes only.Cathodic protection (CP) is a proven technique for corrosion protection of chloride contaminated concrete structures.Zinc thermal sprayed coatings a
32、re used as distributed anodes in both sacrificial cathodic protection (SCP) and impressedcurrent cathodic protection (ICCP) systems. The California Department of Transportation pioneered zinc thermalsprayed coatings as anodes for ICCP systems on reinforced concrete structures on the Richmond-San Raf
33、ael Bridge in1983,(1, 2)and the Florida Department of Transportation (FDOT) pioneered its use as a SCP system in 1989.(3, 4)In 2012it was estimated that the FDOT alone has used thermal sprayed zinc in over 30 bridges with a combined total of 700,000square feet of metallized concrete. The Oregon Depa
34、rtment of Transportation was the first to install the zinc thermalsprayed coatings as ICCP system anodes in the repairs of steel reinforced concrete on a bridge substructure in 1991. Theuse of thermal sprayed zinc anodes is recognized at this time as a standard practice for corrosion control on rein
35、forcedconcrete members. This AWS process standard covers the application of zinc thermal spray coatings to concrete, with a connection to thereinforcement, using arc and flame spray equipment. This standard is formatted as an industrial process instruction (seeflow chart) and the scope includes: job
36、 description, safety, pass/fail job reference standards, feedstock materials, equip-ment, and a step-by-step process instruction for surface preparation, thermal spraying, and quality control.There are five annexes, including safety information for thermal spraying and job control record. Further in
37、formation onguidelines for CP of reinforced concrete is available in NACE Standard RP0290. A vertical line in the margin or underlined text in clauses, tables, or figures indicates an editorial or technical changefrom the 2002 edition. Comments and suggestions for the improvement of this standard ar
38、e welcomed. They should be sent to the Secretary,AWS C2 Committee on Thermal Spraying, American Welding Society, 8669 NW 36 St, # 130, Miami, FL 33166.1Carello, R. A., D. M. Parks, and J. A. Apostolos, 1989, Development, Testing and Field Application of Metallized Cathodic Pro-tection Coatings on Re
39、inforced Concrete Substructures, FHWA/CA/TL-89/04, Sacramento, CA: State of California Department ofTransportation.2Apostolos, J. A., D. M. Parks, and R. A. Carello, Cathodic protection of reinforced concrete using metallized zinc, Materials Perfor-mance, V. 26, No. 12, pp. 2228, December 1987. Avai
40、lable from NACE International, 1440 S. Creek Drive, Houston, TX 77084-4906.3Sagues, A. A. and R. G. Powers, 1994, Sprayed Zinc Galvanic Anode for Corrosion Protection of Marine Substructure ReinforcedConcrete, SHRP-S-405, Washington, DC: Strategic Highway Research Program.4Apostolos, J. A., D. M. Pa
41、rks, and R. A. Carello, Cathodic protection of reinforced concrete using metallized zinc, Materials Perfor-mance, V. 26, No. 12, pp. 2228, December 1987. Available from NACE International, 1440 S. Creek Drive, Houston, TX 77084-4906.SpecificationsandRequirementsJobReferenceStandardEquipmentSetup and
42、OperationSurfacePreparationZn TSCApplicationInspectionandAcceptanceTestsAcceptFailThis page is intentionally blank.viiiAWS C2.20/C2.20M:2016ixAWS C2.20/C2.20M:2016Table of ContentsPage No.Personnel vForeword.viiList of Tables .xiList of Figuresxi1. General Requirements 11.1 Scope.11.2 Units of Measu
43、re.11.3 Safety 12. Normative References .23. Terms and Definitions .34. Job and Contract Specification 34.1 Requirements 34.2 Job Reference Standard 64.3 Thermal Spray Boundary64.4 Job Control Record .64.5 Thermal Spray Coating Inspector .64.6 Thermal Spray Operator Qualification .64.7 Pre-Contract
44、Award Validation .65. Materials 75.1 Zinc Thermal Spray Wire .75.2 Tensile Bond Strength Test Specimens.75.3 Bend Test Requirements .75.4 Gases.75.5 Abrasive Blasting Media and Air76. Equipment for Thermal Spraying .86.1 Thermal Spray Equipment 86.2 Air Compressors .87. Inspection and Quality Contro
45、l Equipment .87.1 Surface Preparation.87.2 Zinc Thermal Spray coating on Concrete .98. Application-Process Methods.108.1 Surface Preparation.108.2 Thermal Spraying .119. Repair of Zinc Thermal Spray Coating on Reinforced Concrete.1310. Records.1311. Debris Containment and Control 1312. Utility Servi
46、ces .14xPage No.AWS C2.20/C2.20M:2016Annex A (Normative)Sample Job Control Record for Applying Zinc Thermal Spray Coating on Concrete15Annex B (Informative)Safety Information for Thermal Spraying .19Annex C (Informative)Requesting an Official Interpretation on an AWS Standard 27Annex D (Informative)
47、List of Informative References 29Annex E (Informative)Conversion Factors Used in this Publication .31List of AWS Documents on Thermal Spraying33xiAWS C2.20/C2.20M:2016List of TablesTable Page No.1 Inspection and Acceptance Tests.52 Thermal Spray Coating Inspection and Acceptance TestsLaboratory 53 B
48、end-Test Cracking Threshold: Mandrel Diameter vs. TSC Thickness.74 Flame and Arc Spray Standoff Distances and Spray-Pass Widths (Nominal)12B.1 Graphic Symbols .19B.2 Noise Levels Produced by Spray Guns .25B.3 Recommended Shade Numbers for Helmets and Goggles .25List of FiguresFigure Page No.1 TSC Be
49、nd Test Pass and Fail Samples82 Process Flow Chart for Repairing Zinc Thermal Spray Coatings (TSC) on Reinforced Concrete.13This page is intentionally blank.xiiAWS C2.20/C2.20M:2016AWS C2.20/C2.20M:20161Specification for Thermal SprayingZinc Anodes on Steel Reinforced Concrete1. General Requirements1.1 Scope. This standard covers the application of zinc thermal spray coatings to steel reinforced concrete using arc andflame spray equipment. The application of the zinc on steel reinforced concrete requires an electrical connection to thesteel reinforcement. Although other metals can al
