ASTM-B904 › Historical Revision Information
Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding
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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.
Scope
This specification presents the requirements for multilayer coatings of autocatalytic nickel-phosphorus over autocatalytic copper on metallic and polymeric substrates. The coating system is intended to provide electromagnetic interference (EMI) protection properties or electrostatic discharge (ESD) protection to parts fabricated from either polymeric or metallic materials.
Keywords
Metallic coatings--specifications; Nickel--specifications; Nickel coatings--specifications; Polymeric substrates; Substrates; Autocatalytic coatings--specifications; EMI (electromagnetic interference); ESD (electrostatic static discharge) materials/applications; ICS Number Code 25.220.40 (Metallic coatings)
To find similar documents by ASTM Volume:
02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)
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Document Number
ASTM-B904-00(2009)
Revision Level
2000 R09 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Dec. 1, 2009
Document Type
Specification
Page Count
4 pages
Committee Number
B08.03