1、Designation System for Aluminum Finishes The Incorporated Aluminum Association The Incorporated Aluminum Association 900 19th Street, N.W., Washington, D.C. 20006 Other Guidelines for Aluminum Standards Minimizing Water and Data Aluminum Staining of Aluminum 2003 Edition Describes how proper shippin
2、g, This indispensable reference contains: Association handling and storing procedures can minimize water stains. A special nominal and specified chemical Technical feature is a large wall poster outlining compositions of alloys steps to protect against water staining. mechanical and physical propert
3、ies Publications The poster is particularly suitable of commercial alloys for display in shipping or receiving departments where aluminum is mechanical property limits handled. Also included is a “Dew Point . information on comparative Calculator“ table showing under what corrosion performance condi
4、tions water will condense on metal and possibly cause stains. dimensional tolerances for semi- (1 2 pages) fabricated products Key improvements include: Guidelines for In-plant modified tolerance tables with “how to“ descriptions to simplify Handling of Aluminum interpretations of tables Sheet and P
5、late improved and simplified text and Describes procedures and methods footnotes that have been successfully used to handle sheet and plate in the plant, both manually and with the use of equipment. Covers storage, handling, processing and inspection. (16 pages) Care of Aluminum Details cleaning met
6、hods for mill- finished, anodized, chemical-coated, painted, porcelain enameled, plated and laminated aluminum finishes. It includes applications for architectural, transportation and home use. (24 pages) To order these, or other Aluminum Association publications, please visit our web site at: www.
7、aluminum. org About The Aluminum Association The Aluminum Association, based in Washington, DC, with offices in Detroit, MI, represents U.S. and foreign-based primary producers of aluminum, aluminum recyclers and producers of fabricated products as well as suppliers to the industry. Member companies
8、 operate more than 200 plants in North America and many conduct business worldwide. Notice 1 Disclaimer The use of any information contained herein by any member or non-member of The Aluminum Association is entirely voluntary. The Aluminum Association has used its best efforts in compiling the infor
9、mation contained in this book. While the Association believes that its compilation procedures are reliable, it does not warrant, either expressly or implied, the accuracy or completeness of this information. The Aluminum Association assumes no responsibility or liability for the use of the informati
10、on herein. All Aluminum Association published standards, data, specifications and other technical materials are reviewed and revised, reaffirmed or withdrawn. Users are advised to contact The Aluminum Association to ascertain whether the information in this publication has been superseded in the int
11、erim between publication and proposed use. Ninth Edition, January 2003 Reaff i rmed January 2009 The Aluminum Association Designation System for Aluminum Finishes Ninth Edition, January 2003 The many proprietary designations for aluminum finishes can confuse users specifying finishes. To remedy this
12、, the Aluminum Association developed a designation system broad enough to cover all types of finishes currently used on aluminum products and meet future needs as new finishes are developed. These designations are simply a way to name a finish and do not constitute a performance specification. Care
13、must be taken in using these designations as it is possible to create a designation for a finish that is inappropriate or cannot be produced. Almost all finishes used on aluminum may be subdivided into three major categories: 1. Mechanical Finishes 2. Chemical Finishes 3. Coatings When designations
14、for chemical coatings are used alone, it is understood that other processing steps normally used before these finishes are at the option of the processor. Where a finish requires two or more treatments of the same class, the class letter is repeated, each being followed by the appropriate two-digit
15、number. The “Examples of Methods of Finishing“ given in the tables are intended for illustrative purposes and not as specifications. Alternatives to the examples of methods of obtaining a final finish can be used provided that an equivalent finish is produced. Many equipment and process variations a
16、nd limitations exist in the finishing industry that may require modifications of example methods. Designations for specific coatings have been developed for only the first of the five classes listed above - the Anodic Coatings (Table 3). For the present, coatings of the - other four classes may be t
17、entatively designated by the Coatings may be further subdivided into the following respective letters assigned for them (Tables 4 to 7, categories: inclusive). Detailed designations for these four categories Anodic Coatings Resinous and Other Organic Coatings Vitreous Coatings Electroplated and Othe
18、r Metal Coatings Laminated Coatings In the Aluminum Association system, a letter designates mechanical and chemical finishes and each of the five classes of coatings. The various finishes in each class are designated by two-digit numbers. Specific finishes of the various types thus are designated by
19、 a letter followed by a two-digit number as shown in the tables. In the case of Protective and Decorative Anodic Coatings (Table 3), three-digit numbers are used to further define them by minimum coating thickness and weight. Chemical conversion coatings are listed under “Chemical Finishes“ (Table 2
20、) because they are produced by chemical processes and frequently are used as pretreatments with other coatings. A single designation may be used alone for a simple finish, or two or more designations may be combined into a single composite designation to identify a sequence of operations covering al
21、l of the steps leading to a final complex finish. may be developed and added to the system later. System Can Be Expanded If additional finishes require the use of all of the two- digit numbers available in a given group, the system may be expanded by adding a third digit to the numbers. For example,
22、 under Mechanical Finishes - Directional Textured, if new entries are made requiring the use of all the numbers between M35 and M39, the system will be expanded by the use of three-digit numbers M301, M302, etc., as required. This will provide for 99 more designations. While the need for designation
23、s beyond these is not foreseen at present, the system could be expanded still further by adding a fourth digit if necessary. Table 4. Resinous and Other Organic Coatings (R) Designations for these coatings consist of the letter R followed by a two-digit number. The following designations can be used
24、 until a more complete system is developed: R10 - Unspecified Resinous or Other Organic Coating R1X - To be specified Table 5. Vitreous Coatings (Porcelain and Ceramic Types) (V) Designations for these coatings consist of the letter V followed by a two-digit number. The following designations can be
25、 used until a more complete system is developed: V10 - Unspecified Vitreous Coating V1X - To be specified Table 6. Electroplated or Other Metal Coatings (E) Designations for these coatings consist of the letter E followed by a two-digit number. The following designations can be used until a more com
26、plete system is developed: El0 - Unspecified Electroplated or Other Metal Coating E1X - To be specified Table 7. Laminated Coatings (L) Designations for these coatings, which include veneers, plastic coatings and bonded films, consist of the letter L followed by a two-digit number. The following des
27、ignations can be used until a more complete system is developed. L10 - Unspecified Laminated Coating L1X - To be specified Examples Example 3 - Architectural Class I Electrolytically Deposited Color Anodized The following examples show how the Aluminum Associations Designation System for Aluminum Fi
28、nishes is used. The letters AA identify the finish as an Aluminum Association designation. The publication of examples of finishing methods in the designation system by the Aluminum Association does not constitute authority to use the method nor does it imply endorsement of a particular method by th
29、e Aluminum Association. Example 1 - Smooth Specular Finish A smooth specular finish may be obtained by polishing aluminum with an aluminum oxide compound according to the following procedure: begin with grits coarser than 320; follow with 320 grit and a peripheral wheel speed of 30 ds (6,000 Wmin);
30、complete polishing by buffing with tripoli based buffing compound at peripheral speeds of 36 to 41 ds (7,000 to 8,000 Wmin). The designation for this finish is: AA - M21 AA - Aluminum Association M21 - Mechanical finish - buffed, smooth specular (Table 1) Example 2 - Architectural Class I1 Clear Ano
31、dized AA - M32C12A31 AA - Aluminum Association M32 - Mechanical finish - directional textured, medium satin (Table 1) C12 - Chemical finish - inhibited chemical cleaning (Table 2) A3 1 - Anodic Coating - architectural, class II, 10 to 18 pm (0.4 to 0.7 mil) thick, clear (Table 3) AA - M12C22A44 AA -
32、 Aluminum Association M12 - Mechanical Finish - Nonspecular as fabricated (Table 1) C22 - Chemical Finish - chemically etched medium matte (Table 2) A44 - Anodic Coating - architectural, class I (18 pm (0.7 mil) thickness and greater) electrolytically deposited color (Table 3) Example 4 - Automotive
33、 Trim AA - MllC12C31A213 AA - Aluminum Association MI1 - Mechanical Finish - as fabricated specular (Table 1) C12 - Chemical Finish - inhibited chemical cleaned (Table 2) C3 1 - Chemical Finish - highly specular chemical brightening (Table 2) A213 - Anodic Coating - protective and decorative, clear,
34、 minimum thickness 8 pm (0.3 mil) (Table 3) Example 5 - Chromium-Plating The finish for chromium-plated aluminum which is first given a smooth specular mechanical finish, then a nonetch chemical cleaning, followed by a thin anodic coating produced in phosphoric acid, and finally chrome plating is de
35、signated as follows: AA - M21C12AlXElX AA - Aluminum Association M21 - Mechanical Finish - smooth specular, produced by polishing with aluminum oxide compound followed by buffing with tripoli based compound (Table 1) C12 - Chemical Finish - inhibited chemical cleaned (Table 2) A1X - Anodic Coating -
36、 specify exact anodizing process (Table 3) E1X - Metal Coating - specify exact chrome-plating procedure (Table 6) Finish Designations All designations are preceded by the letters AA to identify them as Aluminum Association designations. Mechanical Finishes (M) As Fabricated MI0 - Unspecified MI1 - S
37、pecular as fabricated M12 - Nonspecular as fabricated MIX - Other (to be specified) Buffed M20 - Unspecified M21 - Smooth specular M22 - Specular M2X - Other (to be specified) Directional Textured M30 - Unspecified M31 - Fine satin M32 - Medium satin M33 - Coarse satin M34 - Hand rubbed M35 - Brushe
38、d M3X - Other (to be specified) Nondirectional Textured M40 - Unspecified M41 - Extra fine matte M42 - Fine matte M43 - Mediummatte M44 - Coarse matte M45 - Fine shot blast M46 - Medium shot blast M47 - Coarse shot blast M4X - Other (to be specified) Chemical Finishes (C) Includes cleaning treatment
39、s, chemical or electrochemical brightening, and chemical conversion coatings Nonetched Cleaned C10 - Unspecified C11 - Degreased C12 - Inhibited chemical cleaned C1X - Other (to be specified) Etched C20 - Unspecified C21 - Fine matte C22 - Mediummatte C23 - Coarse matte C2X - Other (to be specified)
40、 Brightened C30 - Unspecified C31 - Highly specular C32 - Diffuse bright C3X - Other (to be specified) Chemical Coatings C40 - Unspecified C41 - Acid chromate-fluoride C42 - Acid chromate-fluoride-phosphate C43 - Alkaline chromate C44 - Non-chromate C45 - Non-rinsed chromate C4X - Other (to be speci
41、fied) Coatings (A, R, V, E, L) Anodic Coatings (A) General A10 - Unspecified A1 1 - Preparation for other applied coatings A12 - Chromic acid anodic coatings A13 - Hard, wear and abrasion resistant coatings A1X - Other (to be specified) Protective and Decorative Coatings less than 10 pm (0.4 mil) th
42、ick A21 - Clear A22 - Integral color A23 - Impregnated color A24 - Electrolytically deposited color A2X - Other (to be specified) Architectural Class I1 Coatings 10 to 18 pm (0.4 to 0.7 mil) thick A31 - Clear A32 - Integral color A33 - Impregnated color A34 - Electrolytically deposited color A3X - O
43、ther (to be specified) Architectural Class I Coatings 18 pm (0.7 mil) and thicker A41 - Clear A42 - Integral color A43 - Impregnated color A44 - Electrolytically deposited color A4X - Other (to be specified) Resinous and Other Organic Coatings (R) R10 - Unspecified RlX - Other (to be specified) Wtno
44、us Coating melain and Ceramic m) (V) V10 - Unspecified V1X - Other (to be specified) Electroplated and Other Metal Coatings (E) El0 - Unspecified E1X - Other (to be specified) Laminated Coatings (L) (Includes veneers, plastic coatings and bonded films) L10 - Unspecified L1X - Other (to be specified)
45、 Table 3. Anodic Coatings (A) - .- Type of Desig- Finish nation Description Examples of Methods of Finishing General A1 0 Unspecified A1 1 Preparation for other applied 3pm (0.1 mil) anodic coating produced in 15% H2S04 at 21C i 1C (70F i coatings 2F) at 129 A/m2 (12 AKf) for 7 min, or equivalent A1
46、 2 Chromic acid anodic coating To be specified A1 3 Hard, wear and abrasion To be specified resistant coating A1 X Other To be specified A21 Clear coating A21 1 Clear coating A212 Clear coating A21 3 Clear coating Coating thickness to be specified. 15% H2S0, at 21C i 1C (7O0F i 2F) at 129 A/m2 (1 2
47、Nff) Coating thickness 3 pm (0.1 mil) minimum, coating weight 6.2 g/m2 (4 mg/in2) minimum Coating thickness 5 pm (0.2 mil) minimum, coating weight 12.4 g/m2 (8 mg/in2) minimum Coating thickness 8 pm (0.3 mil) minimum, coating weight 18.6 g/m2 (12 mgAn2) minimum A22 Coating with integral color Coatin
48、g thickness to be specified. Color dependent on alloy and anodic process A221 Coating with integral color Coating thickness 3 pm (0.1 mil) minimum, coating weight 6.2 g/m2 (4 mg/in2) minimum Protective peripheral wheel speed 30 mls (6,000 ftlmin) Wheel or belt polished with aluminum oxide grit of 18
49、0 to 220 size; peripheral wheel speed 30 m/s (6,000 ftlmin) Wheel or belt polished with aluminum oxide grit of 80 to 100 size; peripheral wheel speed 30 mls (6,000 ftlmin) Hand rubbed with stainless steel wool lubricated with neutral soap solution. Final rubbing with No. 00 steel wool. Brushed with rotary stainless steel wire brush, wire diameter 0.24 mm (0.0095 in.); peripheral wheel speed 30 mls (6,000 ftlmin); or various proprietary satin finishing wheels or satin finishing compounds with buffs To be specified Non-directional Textured M40 Unspecified M41 Extrafinematte Air blasted
