In the aerospace, space, and defense industries, engineering decisions are driven by extreme performance requirements. Components must withstand intense forces, harsh environments, and strict reliability standards—far beyond those seen in typical consumer technologies. Traditionally, metals have been the material of choice because of their strength, durability, and ability to provide electromagnetic interference (EMI) protection.
However, metals come with a significant drawback: weight.
Weight management is one of the most critical challenges engineers face in aerospace design. Every extra gram impacts fuel efficiency, payload capacity, launch costs, and operational performance. As a result, manufacturers are constantly searching for ways to reduce weight without sacrificing strength or reliability.
One solution is to replace metal with polymer materials and electroplate the surface. Conductive paints like MG Chemicals’ 841AR Nickel Conductive Coating are first applied over the polymer to make the surface conductive for subsequent electroplating. After plating with a thin metal layer, the part shields against EMI while helping to lightweight the assembly without sacrificing performance.
Why 841AR Works Well for Electroplating
841AR has several key features that make it particularly well suited as a primer layer for electroplating.
Cost-Effective Conductivity
Unlike coatings that rely on expensive metals such as silver, 841AR uses nickel to provide reliable conductivity at a lower cost. This makes it a practical solution for production environments.
Ferromagnetic Shielding
Nickel’s ferromagnetic properties allow the coating to shield against magnetic fields. While the outer electroplated layer reflects the higher frequency fields, lower frequency magnetic waves pass through but are attenuated by the nickel primer layer.
Excellent Adhesion to Plastics
The acrylic binder system bonds strongly to many substrates, particularly plastics, and is safe to use on polystyrenes. Strong adhesion is critical to ensuring the electroplated layer remains durable during operation.
Corrosion Resistance
Unlike many solid metals, 841AR from MG Chemicals offers strong resistance to corrosion, helping extend component life in harsh environments.
Easy Application
841AR can be applied using a brush or spray, making it suitable for complex or intricate geometries where traditional metal fabrication may be difficult or expensive. It is also offered in an aerosol format for convenient application without the need for spraying equipment.
Real-World Applications
The ability to plate plastics opens up new design opportunities across multiple high-performance industries.
Aerospace
In aerospace systems, conductive coatings can be applied to high-performance polymers to replace aluminum engine components. The resulting parts are lighter while offering improved durability and impact resistance.
Space
Satellite components and structural elements can benefit from plated polymer materials. These components reduce weight while maintaining structural integrity and enabling EMI shielding when properly grounded.
Defense
Weight reduction is especially critical for soldiers carrying electronic devices in the field. Plated plastic frames allow mobile devices to be lighter and more durable while also adding EMI shielding for sensitive electronics.
Drones
Strong, lightweight frames and panels are essential for building an agile drone while maximizing battery efficiency. Carbon fiber is often a top choice for this purpose, but it comes with notable limitations and higher associated costs.
Electroplated plastics offer a more economical alternative, and their versatile manufacturing methods enable the creation of highly intricate geometries—something that is significantly more constrained with carbon fiber molds and layups. The addition of an electroplated layer enhances strength while preserving these design advantages, maintaining a balance of low weight and enhanced strength.
The Future of Lightweight Engineering
As aerospace and defense systems continue to evolve, the demand for lighter, stronger, and more efficient materials will only increase. Conductive coatings that enable electroplating on polymers help engineers achieve EMI compliance while balancing weight constraints.
For engineers looking to explore this approach, conductive coatings like 841AR provide a practical entry point into lightweight plated polymer manufacturing.
Speak with an expert today to learn how MG Chemicals conductive coatings can enhance your designs. Request datasheets, sample kits, or process validation support.
