文档介绍：Anodizing Aluminum
Anodizing Aluminum
by Ron Newman
The following procedure is for anodizing aluminum parts. Anodizing will protect the aluminum parts by making the surface
much harder than natural aluminum. Aluminum oxide is grown out of the surface during anodizing and then es
aluminum hydrate that is extremely hard. The porous nature of the anodized layer allows the product to be dyed any color
that is required. The method I describe is Type II anodizing (room temperature) and gives an anodized layer of .0002"
to .001" (half which is grown into the surface and half out of the surface). Parts anodized will e slightly larger by
about .0005" Type III (hard coat) anodizing is done at much colder temperatures and at higher current densities and can
reach thick nesses of .002". Type III anodized surfaces can typically only be dyed black or dark green due to the denser pore
size. I do not cover hard coat procedure due to it not being in the "home brew" category due to the colder acid temp and high
current density that would be required to perform it. The anodizing guide will show you how to perform the more popular
Type II anodizing (Room Temp) using the home brew hanging wire method with materials found at typical hardware and
auto parts stores, (bare bones method). Almost everything you need can be found locally except anodizing dyes and sealer
which I sell small quantities on this site.
Here are a few parts done with this system on my brother in laws car. Note the red pulley and water pump housing anodized
in Red, anodizing is not just for hose fittings. The next photo shows an after market skid plate that was anodized and dyed red
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Anodizing Aluminum
to match the bike's colors.
Yes just about anything aluminum can be anodized, even these aluminum horse shoes!
A little custom color on your bike parts gives it a one-of-a-kind look. It is possible to do 2 tone color ano