1、AMSC N/A AREA MFFP INCH-POUND MIL-STD-2197A(SH) 24 April 2012 SUPERSEDING MIL-STD-2197(SH) 28 March 1989 DEPARTMENT OF DEFENSE STANDARD PRACTICE BRUSH ELECTROPLATING ON MARINE MACHINERY Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH
2、) ii FOREWORD 1. This standard is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 2. Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea Syst
3、ems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact information can change, you may want to verify the currency of this address information using the ASSI
4、ST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH) iii CONTENTS PARAGRAPH PAGE 1. SCOPE 1 1.1 Scope . 1 1.2 Classification 1 2. APPLICABLE DOCUMENTS 1 2.1 General 1 2.2 Government docum
5、ents 1 2.2.1 Specifications, standards, and handbooks 1 2.2.2 Other Government documents, drawings, and publications . 1 2.3 Non-Government publications 2 2.4 Order of precedence 2 3. DEFINITIONS . 2 3.1 Approved (approval) . 2 3.2 Authorized representative . 2 3.3 Plating activity 2 3.4 Postplating
6、 treatments . 2 3.5 Preplating treatments 2 4. GENERAL REQUIREMENTS 2 4.1 Equipment . 2 4.1.1 Power packs . 2 4.1.2 Plating tool handles. . 2 4.1.3 Automatic processing equipment. 3 4.2 Materials. 3 4.2.1 Solutions . 3 4.2.1.1 Solution acquisition . 3 4.2.2 Anodes . 3 4.2.2.1 Graphite anodes . 3 4.2
7、.3 Tool coverings 3 4.3 Plating procedures. 3 4.3.1 Requirements for plating procedures 3 4.3.2 Sources of information for procedures . 4 4.4 Qualification requirements. . 4 4.4.1 Procedures 4 4.4.1.1 Specimens needed to qualify. 4 4.4.1.1.1 Manual application procedure . 4 4.4.1.1.2 Machine assiste
8、d application procedure . 5 4.4.1.2 Plating of qualification specimens . 5 4.4.1.3 Inspection requirements . 5 4.4.1.3.1 Manual application procedure . 5 4.4.1.3.2 Machine assisted application procedure . 5 4.4.1.4 Valve seat and disc repair procedures 5 4.4.2 Qualification criteria 5 4.4.2.1 Traini
9、ng . 5 4.4.2.2 Examinations . 6 4.4.2.2.1 Written examination . 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH) iv CONTENTS PARAGRAPH PAGE 4.4.2.2.2 Practical examination 6 4.4.2.3 Qualification determination . 6 4.4.3 Requalifica
10、tion . 6 4.4.4 On-the-job-training. 6 4.5 Restrictions and limitations. 6 4.5.1 Structural reinforcement . 6 4.5.2 Cracks . 6 4.5.3 Hydrogen embrittlement 6 4.5.4 Case-hardened steel parts . 6 4.5.5 Spray metallized parts 7 4.5.6 Substitution of solutions . 7 4.5.7 Mixing of solutions 7 4.5.8 Aged s
11、olutions 7 4.5.9 Recovered solutions . 7 4.5.10 Restrictions on electrodeposited metals. 7 4.5.10.1 Cadmium . 7 4.5.10.2 Chromium 7 4.5.10.3 Lead and lead alloys 7 4.5.10.4 Cobalt and cobalt alloys 7 4.5.10.5 Tin, indium, and tin-indium alloys 7 4.6 Safety requirements 7 4.6.1 Eye protection 7 4.6.2
12、 Respiratory protection 7 4.6.3 Skin protection . 8 4.6.4 Recovery of solutions . 8 4.6.5 Mixing of solutions 8 4.6.6 Waste solution disposal 8 4.7 Job planning requirements 8 4.7.1 Selection of metals to be electroplated . 8 4.7.2 Identification of base metal material 8 4.7.3 Job records . 8 4.7.3.
13、1 Essential job data . 8 4.7.4 Design of anode 8 4.7.5 Deposition time 8 4.7.6 Amount of solution required 8 4.8 Methods of inspection . 9 4.8.1 Visual inspection 9 4.8.2 Adhesion tests 9 4.8.3 Thickness of deposit . 9 4.8.4 Dye penetrant inspection 9 5 DETAILED REQUIREMENTS 9 5.1 Types of damage wh
14、ich can be repaired . 9 5.2 Repair of pits and scores . 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH) v CONTENTS PARAGRAPH PAGE 5.3 Classification of repairs 9 5.4 Class 1 (corrosion-resistant) coatings . 9 5.5 Class 2 (static c
15、ontact) coatings 9 5.5.1 Seawater static sealing surfaces 10 5.5.2 Steam static sealing surfaces .10 5.5.3 Machinery static mating surfaces 10 5.5.4 Printed circuit repairs 10 5.6 Class 3 (sliding contact surface) coatings 10 5.6.1 Class 3A (sliding contact surfaces requiring NAVSEA approval) coatin
16、gs 11 5.7 Class 4 (nuclear power) coatings .11 6. NOTES 11 6.1 Intended use .11 6.2 Acquisition requirements .11 6.3 Documentation .11 6.4 Subject term (key word) listing 11 6.5 Changes from previous issue .11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
17、IHS-,-,-MIL-STD-2197A(SH) 1 1. SCOPE 1.1 Scope. This standard covers standard practice for brush electroplating on marine machinery. 1.2 Classification. Coating applications to be repaired by brush electroplating are of the following classes: Class 1 - Corrosion-resistant coatings Class 2 - Static c
18、ontact coatings Class 3 - Sliding contact surface coatings Class 3A - Sliding contact surface coatings (requiring NAVSEA approval) Class 4 - Nuclear power coatings 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this standard. This se
19、ction does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited
20、 in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issu
21、es of these documents are those cited in the solicitation or contract. COMMERCIAL ITEM DESCRIPTIONS A-A-59460 - Plating Unit, Selective (Brush), Portable (Copies of this document are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robb
22、ins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these docum
23、ents are those cited in the solicitation or contract. CODE OF FEDERAL REGULATIONS (CFR) Code of Federal Regulations, Title 29, Part 1910 - Occupational Safety and Health Standards (Copies of this document are available from the Superintendent of Documents, U.S. Government Printing Office, Washington
24、, DC 20401 or online at www.gpoaccess.gov/index.html.) NAVAL SEA SYSTEMS COMMAND (NAVSEA) PUBLICATIONS T9074-AS-GIB-010/271 - Requirements for Nondestructive Testing Methods (Copies of this document are available from the Naval Logistics Library, 5450 Carlisle Pike, Mechanicsburg, PA 17055 or online
25、 at https:/nll1.ahf.nmci.navy.mil.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH) 2 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified,
26、the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM B374 - Standard Definitions of Terms Relating to Electroplating ASTM E140 - Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness,
27、Superficial Hardness, Knoop Hardness, and Scleroscope Hardness ASTM E384 - Standard Test Method for Knoop and Vickers Hardness of Materials (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org
28、.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless
29、 a specific exemption has been obtained. 3. DEFINITIONS (Other definitions relating to this standard and electroplating in general should be in accordance with ASTM B374.) 3.1 Approved (approval). Approval refers to when the item under consideration has been accepted by NAVSEA or its authorized repr
30、esentatives. 3.2 Authorized representative. Authorized representative is any Government representative specifically authorized to approve equipment, material, or procedures within the scope of this document for NAVSEA. They are as follows: a. For Government shipyards: The delegated representative of
31、 the shipyard commander. b. For commercial shipyards: The delegated representative of the Supervisor of Shipbuilding, Conversion and Repair (SUPSHIP), or the American Bureau of Shipping (ABS) when specified in the ships specifications for a particular ship. This includes all applicable areas in the
32、shipyard and applicable items furnished to the shipyard by subcontractors. c. When delegated by (a) or (b) above, the representative of Defense Contract Administration Services Management Area (DCASMA). d. Technical representative specifically authorized by NAVSEA. 3.3 Plating activity. Plating acti
33、vity is that organization responsible for and actually performing electroplating. 3.4 Postplating treatments. Any thermal or mechanical process done to the plated part. Postplating treatments include, but are not limited to, stress relief, peening, blasting, and machining. 3.5 Preplating treatments.
34、 Any thermal or mechanical process done to the unplated part. Preplating treatments include, but are not limited to, stress relief, peening, blasting, and machining. 4. GENERAL REQUIREMENTS 4.1 Equipment. 4.1.1 Power packs. Power packs shall be in accordance with A-A-59460. 4.1.2 Plating tool handle
35、s. Handles shall be insulated for safety reasons. Where corrosion is a problem, handles with stainless steel or aluminum cooling fins shall be used. Handles shall be covered with a corrosion-resistant material. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
36、 IHS-,-,-MIL-STD-2197A(SH) 3 4.1.3 Automatic processing equipment. Commercially available automatic equipment listed below may be considered for process improvement: a. Microprocessor for automatic coating thickness display and automatic calculation of ampere-hours (This unit may be attached to exis
37、ting power packs or as an extra unit when new equipment is purchased.) b. Microcomputer which prints out complete procedure for process control c. Internal diameter plating devices d. Plating solution tanks with built-in pumps, filters, heaters, and temperature control systems 4.2 Materials. 4.2.1 S
38、olutions. The solutions used in brush electroplating are generally available only as proprietary products from brush electroplating supply manufacturers. Solutions from any manufacturer which meet all requirements of this standard may be used provided the user is qualified for brush electroplating w
39、ith those solutions. Solutions from different manufacturers shall not be mixed and shall not be used with the same graphite anodes. A complete listing of solutions may be obtained from the solution manufacturers. 4.2.1.1 Solution acquisition. Acquisition of solutions shall be based on the following
40、considerations: a. The reliability of the products and service of the manufacturer based on past experience b. Availability of qualified plating procedures and operators c. Availability of training programs and technical documents d. Availability of technical representatives for consultation and tec
41、hnical assistance for resolution of plating problems which may occur 4.2.2 Anodes. Anodes shall be made from graphite, 90-10 platinum-iridium or platinum, tantalum, columbium, or titanium clad. All anode materials except graphite may be used with different solutions provided they are thoroughly wash
42、ed when changing to a new solution. Anodes used for reverse current shall be marked as such and shall not be used with forward current. 4.2.2.1 Graphite anodes. For most applications, graphite anodes are most practical and least costly. They are available in a variety of shapes or in bulk blocks for
43、 machining special shapes. Graphite shall be acquired only from brush electroplating equipment manufacturers or their authorized agents because commercially available graphite may contain contaminants which are detrimental to electroplating. Graphite anodes shall be used with only one solution and s
44、hall be marked accordingly. 4.2.3 Tool coverings. The solution manufacturers recommended tool coverings shall be used. If the solution manufacturers recommended materials are not available, other coverings may be used provided the plating produced meets the solution manufacturers requirements and th
45、e requirements stated herein and the coverings are approved by the plating activitys authorized representative. Some of the most commonly used coverings are: a. Surgical grade United States Pure (U.S.P.) long fiber sterile cotton b. Dacron batting c. Pelon d. Scotch-Brite e. Dacron felt 4.3 Plating
46、procedures. 4.3.1 Requirements for plating procedures. Brush electroplating shall be performed to an approved written procedure. The procedure shall contain as a minimum the following: a. Unique identifying number b. Date of approval c. Authorizing signature d. Applicable plating thickness Provided
47、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2197A(SH) 4 e. Preplating treatments; if required f. Required operators qualification g. Preliminary cleaning h. Electrocleaning and etching i. Rinsing j. Activating k. Plating solutions l. Preplate (If
48、no preplate is required, report that preplating is not required.) m. Process controls (Report the process controls required to ensure the quality of the work. As a minimum, this shall include polarity, current density or voltage, anode to cathode speed, and temperature.) n. Drying o. Post plate trea
49、tments, such as blasting or grinding, if required p. Records q. Inspection requirements and acceptance criteria 4.3.2 Sources of information for procedures. In addition to this document, commercial manuals provided by brush electroplating solution and equipment contractors form the basis for information pertaining to brush electroplating. Current edition
