Cost-effective, Scalable and Electrically Conductive Spray Coatings for Lightning Strike Protection

Lightning protection is a critical component of the Missile Defense Agency (MDA) core standard MIL-STD-464, ensuring the reliability and operational integrity of missile systems. Atmospheric lightning discharge can be inadvertently triggered during fly-out phases, posing a significant risk to missile electronics, aerodynamics, and structural integrity. The MDA seeks lightweight, cost-effective, and high-performance materials to enhance lightning survivability without introducing significant changes to missile size, weight, or power constraints. In Phase I, Texas Biochemicals Inc. (TBC) successfully designed, developed, and optimized an innovative spray- or dip-applied coating engineered to provide exceptional electrical conductivity, thermal insulation, and mechanical durability under extreme conditions. The Lightning Strike Protection (LSP) technology is engineered to provide shielding against natural and artificial radiation, thermal protection, and debris resistance while enabling operational resilience under extreme launch conditions. This advanced coating, applied to Carbon Fiber Reinforced Plastics (CFRP), demonstrated high resilience to simulated lightning strikes, surviving impulse currents of 50 kA, 100 kA, and 150 kA while maintaining structural integrity and aerodynamic performance. The material demonstrated durability, scratch resistance, and aerodynamic stability, minimizing impact on missile efficiency and simplifying maintenance. Building on these successes, Phase II will focus on further optimization and large-scale validation of the coating technology. TBC will down-select competing technologies, refine the formulation for larger Carbon fiber-reinforced polymer panels (approximately 24” x 24”), and conduct rigorous high-energy lightning testing at 200 kA to ensure enhanced survivability under extreme operational conditions. A key goal is a scalable application process that integrates seamlessly into MDA missile systems with minimal requalification. The research will examine lightning attachment behavior to ensure strikes migrate aft, minimizing structural and functional damage. This project complies with International Traffic in Arms Regulations and Export Administration Regulations, ensuring adherence to United States export control laws for defense technologies. The proposed solution aligns with MDA’s long-term objectives for enhanced missile reliability, survivability, and mission success. A collaboration with a prime contractor has been established to evaluate representative samples and provide technical guidance. Their contributions, outlined within Phase II tasks, along with their letters of support, demonstrate a clear intent to serve as a commercialization partner, accelerating the transition of this technology into operational use. Approved for Public Release | 25-MDA-12220 (23 Sep 25)