The Black Oxide of brazed components and dissimilar metal assemblies provides a uniform finish with corrosion resistance and dimentional integrity at an economical cost.

While black oxide conversion coating can effectively be applied to diverse metals including carbon, alloy and stainless steels, copper, brass, bronze, die cast zinc and cast iron; getting satisfactory results on brazed or multiple metal parts has always been difficult.

Cleveland Black Oxide has perfected the Bi-Met process which produces a uniform color for these applications.

In addition to added aesthetic appeal, the Bi-Met process adds the same corrosion resistance and performance benefits achievable with standard black oxide. The resulting surface won't chip or crack, holes and threads don't fill with coating material, no dimensional changes occur, and there is no need to protect internal cavities while treating.