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ASTM B904-25

Standard Specification for Autocatalytic Nickel over Autocatalytic Copper for Electromagnetic Interference Shielding
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ASTM B904-25

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

PUBLISH DATE 2025
PAGES 4
ASTM B904-25

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 should 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.

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.

SDO ASTM: ASTM International
Document Number B904
Publication Date April 1, 2025
Language en - English
Page Count 4
Revision Level 25
Supercedes
Committee B08.03
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