removing aluminum anodizing

Fun facts about anodizing:

The anodizing process only works on aluminium.

It takes place in a sulfuric acid bath chilled to 70 degrees F. and coverts the surface of aluminium from pure aluminum to aluminum oxide. Hard anodize takes place in a sulfuric bath at 50 degrees F, and uses approximately three times the current.

This aluminum oxide is essentially rust, yet it is so dense that it inhibits any further oxidation.

Even regular anodize is HARD that is why you need to stip it off before any polishing.

After the part is anodized microscopic pores still exist in the material, various dyes can then be used to dye the part any number of colors. Following the dying process the part is sealed in a Hot Water bath (it has some other chemicals that help the sealing process). Most dyes are made from organic material and will fade in direct sunlight. So if the part is going to be outside clear anodize or gold anodize is the way to go.

Anodize is a dielectric coating. This is important, when trying to find a good ground don't immediately assume that an aluminum part will make a great ground. If the part has been anodized you need to use an abrasive and scratch through the anodize to get a solid ground. Some companies actually hard anodize (another process, think regular anodize but thicker and harder) aluminum parts and then use them as electric insulators. Weird using aluminum to insulate electricity.

If you buy anodized cookware DO NOT put it in the dishwasher. Automatic dishwashing detergent has just enough of a base to slowly eat through the hard anodized finish with repeated washings. Anodize holds up great to a number of petrochemicals, but won't tolerate strong acids or bases.

To check to see if a part is anodized use a volt meter. If the part that appears to be raw or chromed material won't conduct electricity it is probably anodized.

Do NOT use aluminum polish on anodized parts. The polish has an abrasive that will slowly chew through the anodize. If you buy a nice set of rims that appear to be polished aluminium check with a volt meter before breaking out the mothers. If the part won't conduct electricity DON'T use the polish. Also avoid most wheel cleaners as the harsh chemicals will degrade the anodized finish. Use a product like simple green.

To make anodize look its best a simple coat of wax works well. Although it will attract dust and dirt a light spray of WD40 can make an anodize part (particularly black anodize) look amazing.

Regards,

Joe Dokes