MIL-A-8625F

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(Unless otherulse Indicated, copies of federal and military specifications and standards are available from DODSSP-Customer Service, Standardlzatlon Documents Order Desk, 700 Robblns Avenue, Building 4D, Phlladelphla, PA 19111-5094.) 2.2 Non-Government publications. The followtng documents form a part of this-documentto the extent specified herein. Unless otherwise speclfled, the ~ssues of the documents which are DOD adopted are those llsted In the Issue of the 0001SS cited In the solicitation. Unless otherwise speclfled, the issues of documents not llsted In the DODISS are the issues of the documents cited fn the sollcltatlon (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTH) ASTM B 117 ANSI/ASTM B 137 = ASTM B 244 Method of Salt Spray (Fog) Testing Height of Coating on Anod~cally Coated Aluminum, Measurefnent of Thickness of Anodic Coatings on Alumlnum and of Other Nonconductive Coatings on Nonmagnetic Basis Metals with Eddy Current Instruments, Measurement of Light and Water Exposure Apparatus (Carbon-Arc Type) for Testing Paint, Varnish, Lacquer and Related Products, Standard Practice for Operating
1.2 Classification. The anodic coating Types and Classes covered by this specification are as specified herein (see 6.2 and 6.21):
1.2.1 Types Type I Type IB Type IC Type II Type 116 Type III Chromic acid anodizing, conventional coatings produced from chromic acid bath (see 3.4.1) Chromic acid anodizing, low voltage process, 22~ 2V, (see 3.4.1) Non-chromic acid anodizing, for use as a non-chromate alternative for Type I and 16 coatings (see 3.4.1 and 6.1.2) Sulfuric acid anodizing, conventional coatings produced from sulfurlc acid bath (see 3.4.2) Thin sulfuric acid anodizing, for use as a non-chromate alternative for Type I and 16 coatings (see 3.4.2 and 6.1.2) Hard Anod\c Coatings (see 3.4.3)
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1.2.2 Classes. :Class 1 Class 2 - Non-dyed (see 3.5.) -Dyed (see 3.6.)
Benefic~al comments (recommendations, aቤተ መጻሕፍቲ ባይዱditions, deletions) and any pertinent data which may be of use In Improving this document should be addressed to: Commanding Officer, Naval Alr Warfare Center Aircraft Dlvlsion Lakehurst, Code SR3, Lakehurst, NJ 08733-5100, by using the self-addressed Standardlzatlon Document Improvement Proposal (00 Form ?426) appearlnq at the end of this document or by letter. AREA MFFP Approved for public release; distribution Is unlimited.
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NOT MEASUREMENT SENSITIVE MIL-A-8625F SUPERSEDING MIL-A-8625E 25Aprll 1988
AMSC N/A DISTRIBUTION STATEMENT A:
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MIL-A-8625F
2. APPLICABLE DOCUMENTS 2.1 Government documents, 2.1.1 Speciflcattonsand standards. The followlng speclflcatlonsand standards form a part of this document to the extent speclfled herein. Unless otherwise speclfled, the issues of these documents are those l~sted h the issue of the I)epartment Defense Index of Specificationsand Standards of (0001SS) and supplement thereto, cited In the solicitation. . SPECIFICATIONS MILITARY MIL-P-23377 MIL-C-81706 MIL-P-85582 FEDERAL QQ-A-250/4 STANDARDS FEDERAL FED-sTD-141 FED-STD-151 MILITARY MIL-STD-105 Sampling Procedures and Tables For Inspect~on By Attribute Paint, Varnish, Lacquer, and Related Materials: Methods For Sampltng and Testing Metals; Test Methods Aluminum Alloy 2024, Plate and Sheet Primer Coating, Epoxy-Polyamide,Chemical and Solvent Resistant Chemical Conversion Materials for Coating Alumlnum and Aluminum Alloys Primer Coatings: Epoxy, Waterborne
1.
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SCOPE
1.1 Scope. This specification covers the requirements for SIX types and two classes of electrolyticallyformed anodic coatings on aluminum and aluminum alloys for non-architecturalapplications (see 6.1).
(Application for cop~es should be addressed to the American Society for . Testing and Materials, 1916 Race Street, Phlladelphla, PA 19103.) 3 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing In this document, however, supersedes applicable laws and regulat~ons unless a speclflc exemption has been obtained.
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1-0September 1993
MILITARY SPECIFICATION
ANOC)IC COATINGS FOR ALUMINUM AND ALUMINUMALLOYS This spec!ffcatlon Is approved for use by all Departments and Agencies of the Department of Defense.
ASTMD 822
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M~L-A-8625F
ASTMD
2244
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ASTMG 23
ASTMG26
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Color D“lfferences OpaquOflter~alsi of .,. Instrumental , J Evaluation of Standard Practice for Opera$@g Light Exposure Apparatus (Carbon-Aic Type) bllthandllf’thout Water for Exposure of Non-metallic Materials Operating Light-Exposure Apparatus (Xenon-Arc Type) With and bllthoutIlaterfor Exposure of Non-metalllc materials
3.
REQUIREMENTS
3.{ Materials. The materials used shall be such as to produce coatings which meet the requirements of this specification. 3.1.1 Base metal. The base metal shall be free from surface defects, caused by machining, cutting, scratching, polishlng, buffing, roughening, bending, stretching, deforming, rolling, sandblasting,vaporblastlng, etching, heat treatment condltlon, alloy chemtstry Imbalance and inclusions, that will cause coated test panels or parts to fafl any of the requirements of this specification. The base metal shall be subjected to cleaning, etching, anodlzlng and seallng procedures as necessary to yteld coatings meeting all requirementsof th!s specification. 3.2 Equipment and processes. The equipment and processes employed shall be such as to produce coatings which meet the requirements of th~s specification.-Unless otherwise specified In the contract, purchase order or applicable drawfng (see 6.2), process operating conditions shall be at the option of the supplfer. 3.3 General. 3.3.1 Anodlztng of parts and assemblies. 3.3.1.1 Anodlzlng of parts. Unless otherwise specified in the contract, purchase ortieror ap@Jicable dr$u?fig(see’6:2), parts shall be anodized after , ,, al? heat treatment,~. machining, ~e?dlr!g?formingand perforating have been . completed. ! 3.3.1.2 Anod~zhd of assemb~ies. ‘Unlessotherwise speclfled In the contract, purchase”brderor applicable drawi%g, anodic coatings shall not be applied to-assembltes whtch’will’ entrapthe’electrolyte In joints or recesses (components shall be anodized separately prior to assembly). Nhen anodlzlng of assemblies is authorized by the;coit~actj purchase,orderor applicable drawing, the proce,sslng,fflet~od ’s~all not result in subsequent damage to used the assembly from electrolyte entraprnent[Type I or”IA coatings shall be used ( unless another coating Type Is specl,fied). Assemblies which contain non-aluminumparts such as steel, brass or organic substances, which would be attacked by pretreatment or anodizing solutlons or would prevent un{form formation of the anodlc coating, shall not be anodized as assemblies, unless the non-aluminum surfaces are masked or electrically insulated In a manner which produces anodlc coatings meeting the requirements of this specification.