# Steel surface welding with high-frequency current

High-frequency currents induce skin-effect resistance that is used on some applications to weld metals.

Assume you have two steel rectangles of dimension $h_0, w, l$ and $h_1, w, l$ placed together along the $h$ axis. I'm wondering if placing a strong enough current through appropriate probes in the transverse faces of the rectangle, will generate enough heat to weld the touching faces uniformly, with no sticks or rods involved