Interlox^® 4220 – Advanced surface treatment for aluminum and EV applications

Aluminum’s increasing adoption in the automotive industry is partly being driven through expanded integration of structural and gigacastings, which reduce part count, simplify assembly, and support lightweighting initiatives. Additionally, electric vehicle market growth further supports the rising use of aluminum, where a large majority of the battery components are constructed from it. This also introduces new challenges in surface preparation, joining, and coating performance, especially where electrical insulation, thermal management, and corrosion protection are critical.

Why surface treatment matters