What is Type 2 Class 2 anodize?
Class 2 Dyed Type IIB is a thin film sulfuric acid anodize. The specification states that anodic coating thickness should be specifically called out by the purchase documents and/or the part drawing.
What is MIL-A-8625 Type II Class 2?
Class II is an anodic coating used for more unimposing commercial applications. Mil-A-8625 is much more simple; class I refers to non-dyed coatings, and class II means the coating is dyed / colored after anodizing and before sealing.
What is MIL-A-8625 Type III?
TYPE III : HARD ANODIC COATINGS MIL-A-8625 Type III sulfuric acid anodizing at 36’F with a coating thickness of 2 – 2.5 mils (very thick!!). This kind of anodizing is accomplished with a bath similar to the standard sulfuric process, but with the temperature reduced to about 0° C to slow the dissolution rate.
What is sulfuric acid anodizing?
Sulphuric acid anodising is an electrolytic process using electricity (DC current) and a sulphuric acid electrolytic solution causing oxidation of the aluminium surface to form a thin “harder” film of aluminium oxide under controlled conditions.
What is the difference between mil a 8625 and MIL-PRF-8625?
The popular anodising specification MIL-A-8625 has been up-issued and renamed MIL-PRF-8625 (issue F2), with immediate effect.
Is mil a 8625 superseded?
Published Date: August 28, 2019. Status: Superseded By: Superseded By: MIL-PRF-8625.
What is Type 3 Class 2 anodizing?
Type II is the conventional sulfuric acid anodize which can be decoratively dyed nearly any color and results in a thickness of 0.0002 – 0.0006”. Hardcoat Anodize is Type III which is done under more exacting process conditions resulting in a harder, denser, thicker, and more abrasion resistant coating.
What are the different types of aluminum anodizing?
There are different types of anodizing, most commonly referred to as Type I-Chromic Acid Anodize, Type II-Sulfuric Acid Anodize, and Type III Hard Anodize or Hardcoat from the Mil-A-8625 designation. Other less common types are phosphoric acid and titanium anodize.
Why is h2so4 used in anodising?
Sulphuric acid anodising is an electrolytic process using electricity (DC current) and a sulphuric acid electrolytic solution causing oxidation of the aluminium surface to form a thin “harder” film of aluminium oxide under controlled conditions. The process is the most common protective treatment for aluminium.
What types of anodizing finishes are available for MIL-A-8625?
SAF’s capabilities for Military Specification Anodizing MIL-A-8625. Note: there are three different anodizing finishes contained in this specification: Type I: Chromic Acid. Type II: Sulphuric Acid. Type III : Hard Anodic Coatings.
What is sulfuric acid Anodize/MIL-A-8625 Type II?
What is Sulfuric Acid Anodize / MIL-A-8625 Type II? The sulfuric acid process is the most common method for anodizing. The sulfuric acid anodize process films range from .0001″-.001″ thick.
What is type III sulfuric acid anodizing?
Type III sulfuric acid anodizing at 36’F with a coating thickness of 2 – 2.5 mils (very thick!!). This kind of anodizing is accomplished with a bath similar to the standard sulfuric process, but with the temperature reduced to about 0° C to slow the dissolution rate.
How thick is sulfuric acid Anodize?
The sulfuric acid anodize process films range from .0001″-.001″ thick. The overall thickness of the coating formed is 67 percent penetration in the substrate and 33 percent growth over the original dimension of the part. How is Sulfuric Acid Anodize different from other types of anodize?