What is a mill finish on aluminum?
Mill finish is the natural appearance of aluminum as it comes from the rolling mill. There is no external mechanical or chemical finishing to the surface of the metal. Alternative options include bright or brushed aluminum. Industrial safety and warning tags are often printed on a mill finish substrate.
Does mill finish aluminum rust?
While it dose not rust, aluminum will oxidize. This oxidation appears as white residue and pitting. Aluminum must be either powder coated or anodized to prevent oxidation. Mill finished aluminum surfaces will oxidize over a long period of time.
What does a mill finish look like?
A mill finish, however, will often be dull, grainy and without a certain luster. This is often referred to as an unfinished appearance. Any aluminum with this type of finish will contain a slight amount of oxidation. This is a trait of all extruded or rolled aluminum.
What is mill finish on metal?
Mill finish is the surface texture (or finish) of metal after it exits a rolling mill, extrusion die, or drawing processes, including sheet, bar, plate, or structural shapes. This texture is usually rough and lacks lustre; it may have spots of oxidation or contamination with mill oil.
What is the difference between mill finish and anodized?
What is the difference between anodized and mill finished? Mill is the raw state of aluminum as extruded – no surface treatment. Anodized (also known as Satin Clear or Clear Anodized) is an electrolytic process. This process increases corrosion resistance and wear resistance.
Can you powder coat mill finish aluminum?
A. Anodised aluminium is not recommended for powder coating as our standard pre-treatment process (chromate conversion pre-treatment) cannot contact and treat the raw aluminium substrate due to the presence of the anodised layer.
Can you paint mill finish aluminum?
“Mill Finish” is the term that Flannery uses to describe its aluminum trims that have no finish applied to them. In other words, it is raw aluminum from our mill and it can be field primed and painted.
What color is mill finish aluminum?
Mill finish is the natural finish that aluminum extrusions have as they emerge from the extruder die. It’s basically bare aluminum. Mill finish will oxidize with a light white powder (aluminum oxide) as it is exposed to air and moisture.