|Type II||Class 1||Thickness .0001-.0003||Clear|
|Type II||Class 2||Thickness .0003-.0005||Black|
|Type II||Class 2||Thickness .0002-.0004||Yellow/Gold, Red, Blue|
Nickel Acetate Seal Available
Anodizing is an electrolytic process used to increase the thickness of the natural oxide layer on the surface of metal parts, greatly increasing the corrosion resistance and wear resistance as the anodized coating can be up to 7 times harder than the aluminum substrate itself.
Another feature of anodized coatings is their electrical resistance. In many cases, this resistance is desired but, when electrical conductivity is important, masking of selected areas is commonly called out. The masked areas are almost always chromated prior to masking.
For colored anodize, most dye bases are organic and require different immersion times to achieve the desired color. Not all colors have the same lightfastness. Some retain their color well, and others tend to fade over time with exposure to UV light.
Once a part is anodized and dyed, it is generally “sealed”. Sealing increases corrosion resistance and dye retention. This is achieved with a hot nickel acetate solution or boiling deionized (D.I.) water. These processes seal the pores created in the anodize process.