Disadvantages Of Black Oxide Coating Stainless Steel

When fasteners are dipped into the black oxide bath materials warm and hot processes the harsh chemical components convert the top layer into magnetite.

Disadvantages of black oxide coating stainless steel.

Black oxide is a form of coating used as a finish for ferrous metals stainless steel and copper and its alloys. Epi s line of high temperature blackeners offers impressive abrasion and corrosion resistance and several products meet military and ams specifications. The main point of stainless steel is the surface is more corrosion resistant as the bare metal usually with passivation of course. Black oxide or blackening is a conversion coating for ferrous materials stainless steel copper and copper based alloys zinc powdered metals and silver solder.

Assessing process variables as with any high end engineering process numerous variables are at work during a black oxide coating sequence. Prized both for the. Hot temperature black oxide processes produce glossy black blue coatings and true black oxide magnetite finishes in 10 20 minutes. It is used to add mild corrosion resistance for appearance and to minimize light reflection.

Black oxide like other coatings is used to provide protection to the part achieve a required appearance or achieve other desired properties. The black oxide treatment is also referred to as gun bluing. One of its advantages over other coatings is. If you must then stainless can be painted or powder coated without too much trouble but processes like black oxide and electroplating typically require stainless to be activated using a very harsh acid mix.

As advantageous as this supplementary feature undoubtedly is black oxide failure does occur so we need to stay abreast of the common problems incurred by this oxidizing process.