In the mid-1950s, Kolene Corporation’s founder, John H. Shoemaker, introduced the first ferritic nitrocarburizing (FNC) salt bath technology in North America. Known as “Tufftride,” this groundbreaking molten salt process significantly enhanced the metallurgical properties of ferrous metals.

Today, Kolene proudly continues its longstanding tradition, supplying advanced molten salt technologies designed to improve metallurgical characteristics and, in many cases, the corrosion resistance of treated parts. As a trusted supplier of both FNC equipment and specialty chemicals, Kolene offers its extensive 82-year legacy of innovation and excellence to companies seeking versatile and reliable surface treatment solutions.

Kolene has recently relaunched its specialized salt bath nitriding chemical product line, including Kolene® FNC-Base™, Kolene® FNC-Regen™, and Kolene® QS™. As a global leader in molten salt bath technology, Kolene’s equipment and chemistries are trusted worldwide for effectively cleaning, conditioning, and enhancing metal surfaces. Our nitriding solutions provide exceptional surface hardening and superior corrosion protection.

Kolene Corporation remains family-owned and has operated continuously since 1939.