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ASTM B904-00(2021)

Current Reaffirmation

Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding

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1.1 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


This specification covers the requirements for multilayer coatings of autocatalytic nickel-phosphorus over autocatalytic copper intended for electromagnetic interference or electrostatic discharge shielding to parts fabricated from either polymeric or metallic substrates or parts. Coatings are classified into four types based on thickness and testing requirements, and into two grades based on alloy composition, specifically phosphorus. Surfaces shall be prepared by cleaning it of surface contaminants, conditioning, and activation; identifying of base material suitability; and mechanical roughening. Coatings shouldl be inspected for process qualification, appearance, blisters, unplated areas, adhesion, electrical continuity, and DC resistance. Coatings should also be tested for thickness, which may be performed either by Coulometric, X-ray, or Beta backscatter methods. The requirements for process qualification shall include coating composition, electrical integrity, adhesion, thermal shock resistance, thermal cycling, and shielding effectiveness.


SDO ASTM: ASTM International
Document Number B904
Publication Date April 1, 2021
Language en - English
Page Count 4
Revision Level 00(2021)
Supercedes
Committee B08.03
Publish Date Document Id Type View
March 10, 2000 B0904-00 Revision
April 1, 2021 B0904-00R21 Reaffirmation
Nov. 1, 2014 B0904-00R14 Reaffirmation
Sept. 1, 2009 B0904-00R09 Reaffirmation
Oct. 1, 2004 B0904-00R04 Reaffirmation