Let’s understand what actually is bright dip anodizing. It basically involves two finishing processes which are carried consecutively. The first finishing process is bright dipping and the second one is anodizing. Bright dipping provides a mirror finish whereas; anodizing is for extra corrosion protection.
Wood grain aluminum is one of the most popular alloys to go through this process due to the high workability and its surface finish. The profiles are bathed in phosphoric and nitric acid’s solution. This bath is for smoothing the microscopic peaks that can be rough on the surface. This is the bright dipping, and the profiles become very shiny after the procedure.
Second procedure that is anodizing thickens the oxide layer that occurs naturally on aluminum. Oxide layer fights against the corrosion and thickening it means increasing the corrosion resistance.
Once, the oxide layer is enhanced it will have innumerable miniature holes which makes it dye friendly. Before the layer is sealed, different color dyes can permeate through these teeny tiny holes. After the layer is sealed, it locks the color in, and it becomes highly resistant to fading.
The three major benefits of bright dip anodizing are the profiles will be:
Now, coming to some of the most common standard shapes; they are tubes, channels, and angles.
The tubing has to be the most common out of the three. It is mostly used for architectural features that are outdoors like trim or railing. Then comes channels and angles which also frequently go through the process of bright dip anodizing. They both are usually used for the same purposes like mirror installations, securing fixed panels of glass and other.
6463 aluminum and wood grain aluminum are two of the best alloys for this process. These profiles are good for both bright dipping and anodizing. However, the chemicals used in the process are hazardous and requires great caution.
Phosphoric and nitric acid are both toxic in nature for human beings. The process also produces Nitrogen Dioxide and Nitric Oxide as its off-gas. These two are referred to as NOx when combined together.
If you are looking for mirror shine in your extrusions, then you should go for bright dip anodizing as it will provide the shine like the mirror. This process is famous for the shine it provides so if that’s what you are looking for it is your best shot.