Elimination of Hexavalent Chromium/Cadmium for Sustainment – Phase II

NCMS Project #: 142064

Problem: Protection of vehicle operators and maintainers from hazardous materials which cause death, injury or occupational illness while conducting maintenance and sustainment operations is critical to the safety and health of these individuals and the public in general.  This is especially true during vehicle maintenance, where dust, particles and aerosols contain lead, hexavalent chromium (Cr6+and Cadmium (Cd).  Cd and Cr6+ are world recognized as a human carcinogen as well as the cause of a host of other diseases and health issues.

Benefit: 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.

Solution/Approach: Zinc Nickel (ZnNi) does not contain toxic/carcinogenic Cd or Cr6+.  During Phase I the project team determined a path forward for the M109A6 Paladin to transition to ZnNi A new MIL-SPEC for ZnNi that can be applied to fasteners to replace Cd and Cr6+ plated fasteners and hardware was created.  Phase II will continue work and demonstrate the transition of the M109A7 to ZnNi hardware (fasteners, connectors, mechanical components) as a proof-of-concept and model for other programs.  In addition, the project will prep the M109A6 hardware that is common and identify what is different to prep for M109A7 sustainment to further support the business model for enhanced supply chain diversity.

Impact on Warfighter:

  • Safer work environment 
  • Decrease health and environmental risks 
  • Reduce corrosion and overall maintenance demand and costs 
  • Ensure 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)
  • PdM Self-Propelled Howitzer Systems

Industry Participation:

  • BAE Systems
  • Booz Allen Hamilton
  • MNP Corporation
  • SAIC
  • NCMS

Benefit Area(s):

  • Cost savings
  • Positive environmental impact
  • Safety

Focus Area:

  • Energy, environmental, health, and safety