Anodized Aluminum

Frequently Asked Questions About Anodized Aluminum

Why is there a mark on full sheets or full length extrusions?

During the anodizing process, electrical contact must be made at all times with the material being anodized. Because of this, what is called a rack mark will be made on all anodized pieces. With cut lengths we are able to cut around that mark and scrap out the blemished piece, but with full lengths and sheets there will always be a rack mark that you should account for in your design.

Will the color be consistent?

Technological advancements in the anodizing process have increased the color consistency of the anodized coating, however there still may be some variations from one sheet to the next.

Can anodized aluminum be welded?

The simple answer is yes, but in order to weld the anodized extrusions you would need to grind away the anodic layer around the weld which is not aesthetically pleasing.

How do you clean anodized aluminum?

It is recommended to clean anodized surfaces with a non scratching abrasive sponge and a mild soap. Harsh acidic or alkaline cleaners are not recommended because they may stain or destroy the finish.