PRESTO BLACK® room temperature black oxide from Birchwood Technology is ideal for small to medium production operations which require robust corrosion resistance and galling protection on critical surfaces for machine components.
The PRESTO BLACK process produces a non-dimensional coating thickness of less than 0.5 micron thickness and is ideally suited for components that require a black finish for visual appeal and rust protection. PRESTO BLACK is a short fifteen-minute process that eliminates the hazards of the hot oxide process by operating at room temperature at 70°. It provides high corrosion resistance and is tested for up to 800 hours humidity exposure when sealed with an appropriate rust preventive.
The PRESTO BLACK process provides a friable crystal structure that serves as a sacrificial barrier on sliding surfaces to protect the underlying steel itself from galling and deformation. The coating is widely used and approved by many industries and recommended for finishing hot rolled steels, alloy steels, tool steels, as well as cast iron, forged steels and powdered metal.
The PRESTO BLACK process can operate with zero discharge of rinse waters using the Birchwood Technologies Ion Exchange System. It cleans and purifies the process rinse waters so they can be re-used rather than sent to the drain. Once available to large companies only, this technology is low cost and routinely utilized on process lines of all sizes with excellent success.See and decide – Birchwood Technologies will finish your sample parts with PRESTO BLACK at no cost and no obligation for your evaluation.