Anodizing | HL Parts | Surface Treatment of Metal Parts

Anodized Aluminium and Aluminium Alloys

Anodic oxidation is the process of forming decorative and protective films on the surfaces of aluminum and its alloys. In principle, the process of forming an oxide film on aluminum is actually an electrochemical reaction in which an electric current is applied at a sufficient voltage to a suitable electrolyte to form a porous oxide film on the surface of aluminum. Anodizing, unless otherwise specified, usually means anodizing sulfuric acid.

Oxidation Type of Aluminum Alloy CNC Machining Parts

Types	description	Available
Type I	chromic acid anodizing,Conventional oxide file was formed in chromium acid tank
Type IB	chromic acid anodizing,Low voltage process,22±2V
Type IC	Anodic oxidation of non-chromic acid, using a non-chromic acid formula to generate class I and IB oxide films
Type II	Anodic oxidation of non-chromic,Conventional oxide film foemed in sulfuric acid tank
Type IIB	Sulfuric acid anodized film ,Conventional oxide film produced using a non-chromic acid formulation
Type III	hard anodizing
Classes	description	HL Parts
Class 1	Non-staining
Class 2	staining

HL Parts in Anodized Capacity

Substrate: aluminum and aluminum alloy

Reference Standard M I L-A-8625F

Film thickness range:

Coating type	I、IB、IC、IIB	II	III
Thickness range(um)	0.5~17.8	1.78~25.4	12.7~114.3

Other processes: sandblasting,chemical sanding,chemical polishing,shielding and blocking holes

Staining: black, blue, red, golden yellow (customized according to customer requirements)

Maximum machining size: 230 * 45 * 110 (cm)

Maximum weight of single piece: 300 (kg)

Sealing method: environmental protection: boiling water, nickel salt, cobalt salt, ferrofluorone closed; non-environmental protection: dichromate, nickel salt + dichromate double closed

Test method: vortex tester membrane thickness test, paint adhesion test, membrane weight test, corrosion resistance test, light resistance test, wear resistance test, insulation test

The hardness of anodic oxidation film is higher than that of aluminum and aluminum alloy. Because the porosity of hard anodic oxidation film is lower than that of ordinary anodic oxidation, the hardness of hard anodic oxidation is relatively high. The hardness range of general reference is as follows.