Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance, and to minimize light reflection.To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax.One of its advantages over other coatings is its minimal buildup. There are many advantages of blackening, mainly: Blackening can be done in large batches (ideal for small parts). There is no significant dimensional impact (the blacking process creates a layer about 1 µm thick). It is far cheaper than similar corrosion protection systems, such as paint and electroplating.

Sandblasting can remove paint, rust, and residue from oxidation from materials quickly and efficiently. Sandblasting can also be used to change the condition of a metal's surface, such as through removing scratches or casting marks. Sandblasting as a cleaning method has been widely used for over a hundred years. There are several variants of sandblasting process like bead blasting, Soda blasting and shot blasting. Before sandblasting, it is mandatory to know about its materials and the pros and cons. There are many material can be Sandblasted, such as glass，stone,metal,wood,Plastics Steel.

Electroplating is a process by which metal ions migrate via a solution from a positive electrode to a negative one. An electrical current passing through the solution causes objects at the cathode to be coated by the metal in the solution. Common metals used in the electroplating process include black and silver nickel, chromium, brass, cadmium, copper, gold, palladium, platinum, ruthenium, silver, tin and zinc. We typically recommend using Grade S or N Nickel, cadmium pellets, CDA 101 OFHC Copper, brass alloys, tin anodes and zinc.

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized. The anodic oxide structure originates from the aluminum substrate and is composed entirely of aluminum oxide. This aluminum oxide is not applied to the surface like paint or plating, but is fully integrated with the underlying aluminum substrate, so it cannot chip or peel. It has a highly ordered, porous structure that allows for secondary processes such as coloring and sealing. Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium. A cathode is mounted to the inside of the anodizing tank; the aluminum acts as an anode, so that oxygen ions are released from the electrolyte to combine with the aluminum atoms at the surface of the part being anodized. Anodizing is, therefore, a matter of highly controlled oxidation the enhancement of a naturally occurring phenomenon.