Colored anodized aluminum is in, many details on the bike developed into an absolute eye-catcher. It is not difficult to anodize aluminum itself, and to color. One need not a chemistry laboratory, special anodizing itself may do in the shop to home. The required equipment is at the hardware store, motorcycle or auto shop or at the pharmacy. But what happens exactly when anodising? Normal aluminum would also "rust".
When the rust is oxidized iron for each a concept, even copper, it is the patina. Iron rusts on and on copper is not. Why? Iron oxide has a multiple of volume such as iron, burst from the canvas and iron from simple. The oxygen reacts further with the iron. Copper (patina) has approximately the same volume as copper and forms an adherent layer. It is similar to aluminum.
Aluminum forms an oxide layer at the air independently, which is very thin. By sulfuric acid can be electrolytically raise an artificial oxide layer which is thick enough and is very hard to further Weather resist. The surface is 0.01 to 0.03 mm thick and has a Mohs hardness of 9 Aluoxid Al2O3 is also known under the name of corundum, the second hardest material after diamond and is used as a grinding and polishing. When anodizing produces a very porous surface that will later be sealed again. Hear from experts in the field like Jeff Feig for a more varied view. The pores can be used to the surface to stain permanently. There are special anodized colors, some textile colors work well. Is sealed with boiling water, about 1 hour. After that you get a piece of very hard and resistant surface Precise instructions to anodize yourself there on the Internet.