Automotive components face a punishing combination of heat, vibration, road salt, and constant mechanical stress, and electric vehicle parts add an entirely new set of demands on top of that. Whether a part is destined for a traditional combustion drivetrain or a new EV battery system, the finish applied to it plays a direct role in how long it lasts and how reliably it performs.
Why Automotive Parts Need Specialized Finishing
Corrosion resistance is the most obvious requirement for automotive components, since exposure to road salt, moisture, and temperature swings will degrade unprotected metal quickly. Beyond corrosion, many automotive parts also need finishes that hold up to friction and wear from constant mechanical motion, without adding unnecessary weight or interfering with tight tolerances. The Lindgren Group has plated automotive and agricultural components for years, providing coatings that improve both corrosion and wear resistance while maintaining the exact specifications manufacturers require. Fasteners, brackets, suspension components, and drivetrain hardware all depend on a finish that can survive years of exposure to road conditions without failing prematurely.
What Electric Vehicles Change About Metal Finishing
EV components introduce challenges that traditional combustion parts never had to deal with. Battery connectors, power distribution components, and high-voltage systems all depend on finishes that maintain excellent electrical conductivity while resisting corrosion over the vehicle’s lifetime. A finish that performs perfectly on a mechanical bracket may not be the right choice for a component carrying current inside a battery pack, which is why EV manufacturers increasingly work with finishing partners who understand both the mechanical and electrical sides of the job. As EV platforms continue to scale production volume, the margin for inconsistent plating gets smaller, since a conductivity issue in a battery connector can affect vehicle range, charging speed, or long-term reliability in ways a purely cosmetic defect never would.
Common Finishes for Automotive and EV Applications
Different components across a vehicle call for different finishing approaches, and understanding which finish fits which application helps avoid over-engineering a part or, worse, under-protecting one that needs it.
Zinc Nickel Plating
Zinc nickel plating provides strong corrosion resistance for fasteners, brackets, and structural components exposed to road conditions, making it a common choice across both traditional and electric vehicle platforms.
Gold and Silver Plating for Conductivity
EV battery connectors and power distribution components often rely on gold or silver plating to maintain low contact resistance and reliable conductivity over the life of the vehicle, especially in high-current applications where signal loss or resistance buildup is not an option.
Chromate and Passivate Finishes
For aluminum and stainless components used throughout a vehicle’s structure and hardware, chromate conversion and passivate finishes add a protective layer against corrosion without significantly altering part dimensions.
High-Volume Production Without Sacrificing Consistency
Automotive and EV manufacturing typically means high-volume production runs, and a finishing partner needs to deliver the same quality on part one thousand as part one. The Lindgren Group’s Avtec Finishing Systems and Nico Products divisions operate with the facilities, staffing, and process control built for steady, high-volume output, backed by ISO and Nadcap accreditation that gives manufacturers documented consistency across every production run. That consistency matters even more in automotive supply chains, where a single inconsistent batch can trigger a rejected shipment, a line stoppage, or a costly recall investigation further down the supply chain.
Working With The Lindgren Group on Automotive and EV Projects
Automotive and EV programs often move through several rounds of design and testing before landing on a final part specification, and a finishing partner who can support that process, rather than just executing a fixed spec, adds real value. The Lindgren Group’s team works directly with engineers during prototyping and testing phases to help identify the right finish for a component’s specific electrical, mechanical, and environmental requirements, then scales that same process into full production once the design is finalized.
Get Started With Automotive or EV Metal Finishing
Whether you are finishing traditional automotive hardware or components for a new electric vehicle platform, The Lindgren Group’s team works directly with engineers to determine the right finish for your specific application, tolerances, and volume. Contact The Lindgren Group to discuss your automotive or EV metal finishing project.