Stainless Black is a chemical conversion which modifies the passive oxide layer of the stainless steel leaving it matt black.

The primary applications are for turned parts, small pressings and in particular for fasteners which need to retain a consistent and durable black appearance. More specifically in military applications where a black, matt, non-reflective surface is essential. For example clips, aerials, latches and fixings. In fact any stainless steel component that needs an alternative to the standard bright metallic appearance. For example medical, optical and scientific equipment. Automotive applications include external and under bonnet fasteners as well as trim accessories - conforming to MG/Rover and Ford specifications.

Stainless Black withstands atmospheric weathering, hot water and temperatures up to 500°C without any change in appearance. The coating is less than 1µm thick and so will not alter any tolerance fits nor change the dimensions of the component to any significant amount. Stainless Black does not affect the inherent corrosion resistance of the base stainless steel and will remain colour consistent longer than an untreated part. It is a non-electrolytic process and so there is no possibility hydrogen embrittlement. The surfaces can be deformed after treatment for example crimped or bent and the coating will not flake, chip or peel. Stainless Black can be delivered either dry to touch or with a range of lubricants.