Anodizing, Type II
Type II Aluminum anodizing, also known as Conventional Anodizing, is an electrochemical process that converts the surface of the aluminum to aluminum oxide in an electrolyte. The aluminum oxide layer provides excellent corrosion resistance, durability, and good adhesion for painting. It is also a good electrical insulator, and can be dyed almost any color.
Anodizing, Type III ( Hard Coat )
Type III (Hard Coat) Aluminum anodizing, is an electrochemical process that converts the surface of the aluminum to a highly wear-resistant aluminum oxide film that is corrosion resistant, and highly abrasion resistant. The main difference between Type II, and Type III anodizing is that hard coat anodizing yeilds an aluminum oxide film that is smoother and harder than conventional anodizing.
Black oxide is a conversion coating formed by a chemical reaction produced when steel parts are immersed in an alkaline aqueous salt solution. The reaction produces a magnetite (Fe3 O4) on the actual surface of the parts.
Black oxide offers corrosion protection, anti-galling, dimensional stability, and esthetic appeal.
Electroless Nickel Plating
Electroless nickel plating is an auto-catalytic chemical coating method employed to deposit a layer of nickel-phosphorus alloy on a workpiece. Electroless Nickel provides improved hardness, lubricity and corrosion resistance