Elimination of Hexavalent Chromium/Cadmium for Sustainment

NCMS Project #: 141039

Problem: Most ground combat and support systems continue to rely on fasteners plated with Cd/Cr6+ or Zinc passivated with Cr6+.  Transitioning away from Cd/Cr6+ to ZnNi is needed to ensure the safety of commercial operators and maintainers who work regularly on bridges, commercial vehicles and other legacy vehicles.  

Benefit: By looking for alternative sources for the coatings, maintenance and sustainment work can be accomplished in a safer environment.  The costs savings from disposal of environmentally harmful elements as well as healthcare could add up to a significant amount.

Solution/Approach: ZnNi is a highly effective replacement for Cd/Cr6+ and Zn/Cr6+.  It provides similar corrosion protectionThis initiative is intended to demonstrate and conduct a proof-of-concept that the industrial base can support a transition to ZnNi plated hardware. The project will test this proof of concept on the Self-Propelled Howitzer System (SPHS) – specifically the M109A6 (Paladin) which is currently fielded. This project will gather information and define the process for maintenance and sustainment transition to ZnNi.

Quad Chart:

Impact on Warfighter:

  • Increase worker productivity due to safer workplace environments
  • Decrease healthcare and disability costs and exposure to harmful toxins
  • Reduce toxic waste and environmental impact
  • Improve warfighter readiness

DOD Participation:

  • U.S. Army Tank-Automotive and Armaments Command (TACOM), Integrated Logistics Support Center (ILSC)
  • Program Executive Office Ground Combat Systems (PEO GCS)
  • U.S. Army Combat Capability Development Command (CCDC) Ground Vehicle Systems Center (GVSC), formally known as U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC)
  • PdM Self-Propelled Howitzer Systems

Industry Participation:

  • BAE Systems
  • NCMS

Benefit Area(s):

  • Cost savings
  • Maintenance avoidance and reliability
  • Positive environmental impact
  • Safety

Focus Area:

  • Energy, environmental, health, and safety