ASTM B904-2000(2014) Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding《电磁干扰屏蔽用自催化铜上的自催化镍的标准规格》.pdf
《ASTM B904-2000(2014) Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding《电磁干扰屏蔽用自催化铜上的自催化镍的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM B904-2000(2014) Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding《电磁干扰屏蔽用自催化铜上的自催化镍的标准规格》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B904 00 (Reapproved 2014)Standard Specification forAutocatalytic Nickel over Autocatalytic Copper forElectromagnetic Interference Shielding1This standard is issued under the fixed designation B904; the number immediately following the designation indicates the year oforiginal adoption o
2、r, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. ScopeThis specification presents the requirements for multilayercoatings of autocatalyt
3、ic nickel-phosphorus over autocata-lytic copper on metallic and polymeric substrates. The coat-ing system is intended to provide electromagnetic interfer-ence (EMI) protection properties or electrostatic discharge(ESD) protection to parts fabricated from either polymeric ormetallic materials.2. Refe
4、renced Documents2.1 ASTM Standards:2A919 Terminology Relating to Heat Treatment of Metals(Withdrawn 1999)3B183 Practice for Preparation of Low-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB252 Guide for Preparation of Zinc Alloy Die Castings forEle
5、ctroplating and Conversion CoatingsB253 Guide for Preparation of Aluminum Alloys for Elec-troplatingB320 Practice for Preparation of Iron Castings for Electro-platingB322 Guide for Cleaning Metals Prior to ElectroplatingB374 Terminology Relating to ElectroplatingB504 Test Method for Measurement of T
6、hickness of Metal-lic Coatings by the Coulometric MethodB532 Specification for Appearance of Electroplated PlasticSurfacesB533 Test Method for Peel Strength of Metal ElectroplatedPlasticsB553 Test Method for Thermal Cycling of ElectroplatedPlastics (Withdrawn 1991)3B554 Practice for Measurement of T
7、hickness of MetallicCoatings on Nonmetallic Substrates (Withdrawn 1987)3B567 Test Method for Measurement of Coating Thicknessby the Beta Backscatter MethodB568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB602 Test Method for Attribute Sampling of Metallic andInorganic Coatin
8、gsB697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB727 Practice for Preparation of Plastics Materials for Elec-troplatingB733 Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on MetalD3330/D3330M Test Method for Peel
9、Adhesion of Pressure-Sensitive TapeD3359 Test Methods for Measuring Adhesion by Tape TestD4935 Test Method for Measuring the ElectromagneticShielding Effectiveness of Planar Materials2.2 Military Standard:MIL-STD-461 Electromagnetic Emission and SusceptibilityRequirements for the Control of Electrom
10、agnetic Interfer-ence43. Terminology3.1 DefinitionsMany of the terms used in this specifica-tion can be found in Terminologies A919 or B374.3.2 Definitions of Terms Specific to This Standard:3.2.1 significant surfaces, nthese surfaces are classified asprimary, secondary, nonsignificant, and coating-
11、free surfaces.3.2.1.1 coating-free areas, adjareas specified on partdrawings or suitably marked samples.3.2.1.2 nonsignificant surfaces, adjall holes, recesses, andother areas where a controlled deposit cannot be obtainedunder normal coating conditions and that cannot be touched1This specification i
12、s under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.03 on Engineering Coatings.Current edition approved Nov. 1, 2014. Published November 2014. Originallyapproved in 2000. Last previous edition approved in 2009 as B904 0
13、0(2009). DOI:10.1520/B0904-00R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version o
14、f this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave. Philadelphia, PA 191115094, Attn: NPODS.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1w
15、ith a 20-mm diameter ball shall be considered nonsignificantsurfaces unless otherwise specified on part drawings or suitablymarked samples.3.2.1.3 primary significant surface, adjall mating surfacesand those other surfaces specified on part drawings or suitablymarked samples.3.2.1.4 secondary signif
16、icant surfaces, adjall surfaces,other than primary significant surfaces, that can be touchedwith a 20-mm diameter ball shall be considered secondarysignificant surfaces unless otherwise specified on part drawingsor suitably marked samples.4. Classification4.1 This classification system provides for
17、the following:4.1.1 Types of coating based on thickness and testingrequirements, and4.1.2 Grades of coating based on alloy composition.4.2 Coating Type:4.2.1 The coating type indicates the type of application andtests to be used in determining the acceptance of the coating.4.2.2 Coating Type Definit
18、ions:4.2.2.1 Type 1Coatings intended to shield devices forFCC/VDE Class B service.4.2.2.2 Type 2Coatings intended to shield devices forFCC/VDE Class B service in harsh environments.4.2.2.3 Type 3Coatings intended to shield devices forMIL-STD-461 requirements.4.2.2.4 Type 4Coatings intended to shield
19、 devices forFCC/VDE Class A requirements.4.2.3 The description of Types 1, 2, 3, and 4 is summarizedin Table 1.4.3 Coating Grade:4.3.1 The coating grade is based upon phosphorus content.NOTE 1The coating grade indicates the relative contact impedanceand the relative corrosion resistance of the nicke
20、l-phosphorus coating andtests to be used in determining the acceptance of the coating4.3.2 Coating Grade Definitions:4.3.3 Grade 1 coatings have a phosphorus content between3 and 5 %.NOTE 2Low phosphorus coatings exhibit low electrical contactimpedance. High phosphorus contents exhibit somewhat high
21、er contactimpedance, however, the coating is more corrosion resistant.4.3.4 Grade 2 coatings have a phosphorus content between6 and 11 %.NOTE 3The adhesion and resistance to blistering are improved onsome polymeric substrates by an initial flash deposit of autocatalyticnickel.5. Ordering Information
22、5.1 To avoid misunderstanding between contractual parties,purchase orders or contracts for autocatalytic nickel overautocatalytic copper coatings under this specification shouldinclude the designation, issue date, and the following informa-tion:5.1.1 Type of substrate.5.1.1.1 Metallic substrates sho
23、uld state the composition andmetallurgical condition. Assemblies of dissimilar materialsshould be identified.5.1.1.2 Polymeric substrates should state the polymer typeand should be of a plating grade.5.1.2 Classification of the deposit by type and grade.5.1.3 Primary significant surfaces and coating
24、-free surfacesmust be indicated on drawings.5.1.4 Any special requirements.5.1.5 Test methods for coating adhesion, thickness, porosity.5.1.6 Sampling program.6. Surface Preparation6.1 Surface ContaminationSurfaces of polymeric partsmust be free of all mold release agents, dirt, oil, grease, andcont
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