ANODIC COATING DESIGNATIONS

 

The chemical finishes and comparative anodic coatings charts are designed as guidelines that match processing and required anodic film thicknesses with customer needs.

 

Chemical Finishes

Type of Finish

 Alcoa Designations

Alum. Assn. Designations

Description

Examples of Methods of Finishes (Not Definitive Techniques)

Line

Non Etched Cleaned

C-10

C-11
C-12

C-1X

Unspecified

Degreased
Inhibited
Chemical
Cleaned

Other

Organic solvent treated
Inhibited chemical type cleaner used

To be specified
Line

Etched

R1

R2

R3

C-20

C-21

C-22

C-23

C-2X

Unspecified

Fine Matte

Medium Matte

Course Matte

Other

Trisodium phosphate, 3-6 oz.,/gal. used at 140-160°F for 5 min.

Sodium hydroxide, 4-6 oz./gal. used at 140-160°F for 5 min.

Sodium fluoride, 1½ oz. plus sodium hydroxide 4-6 oz./gal. used at 140-160°F for 5 min.

To be specified

Line

Brightened

R5-bright Dip* EB10, EB30 Bright Dip

C-30

C-31

C-32

C-3X

Unspecified

Highly Specular

Diffuse bright

Other

Chemical bright dip solution of the proprietary phosphoric nitric acid type used or proprietary electrobrightening.

Etched finish C22 followed by brightened finish C31.

To be specified

* Trade Name of Aluminum Company of America

Comparative Anodic Coating Designations

Film Thick-
ness

Alcoa Designation

Aluminum Association Designations

Descriptions

Type of Finish

Film Thick-
ness



.0001


.0002




.0003






.0004



.0005

.0006

.0007

up




Alumilite 200 .00015 minimum film thickness
------------------
Aluminlite 201 .0002 minimum film thickness
------------------
Aluminilite 202 .0003 minimum film thickness

Aluminilite 203 .00036 minimum film thickness
------------------
Aluminilite 204 .0004 minimum film thickness
------------------
Aluminilite 214 .0006 minimum film thickness



A21


A22





A23





A2X
------------------
A31

A32

A33

A3X
------------------
A41
A42
A43
A4X


Clear (natural) coating


Coating with integral color




Coating with impregnated color




Other
------------------


Same as above




------------------
Same as above

Protective and decorative (coating less than 0.4 mils thick)


(Thickness to be specified by customer)









------------------
Architectural Class II (0.4 to 0.7 mil coating)




------------------
Architectural Class I (0.7 mil and greater anodic coating)

.

.0001


.0002




.0003






.0004



.0005

.0006

.0007

up

 

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© 2001 Aluminum Anodizers Council