Anodic coatings for aluminum and aluminum alloys this amendment forms a part of mila8625f, dated 10 september 1993, and is approved for use by all departments and agencies of the department of defense. Unless otherwise specified, coating will be sealed. This results in a standardized approach to quality assurance and a reduction in redundant auditing. Mila8625 anodic coatings for aluminum and aluminum. Overview of anodizing in the aerospace industry pdf free. Nadcap is an industrymanaged approach to conformity assessment that brings together technical experts from both industry and government to establish requirements for accreditation, accredit suppliers and define operational program requirements. Alternatives to dichromate sealer in anodizing operations. Browse the pdf demo mili45208 quality manual opens in new tabpage. Delete milc81706 chemical conversion materials for coating aluminum and aluminum alloys. Milprf85285e type i, class h coatings are multicomponent 3k, low voc, high solids polyurethane topcoats designed as a finish coat for military aircraft and equipment. Delete mil c81706 chemical conversion materials for coating aluminum and aluminum alloys. It provides details, methods, and procedures for these various coatings.
Mila8625 aluminum anodic coatings mila8625 is the military specification for anodic coatings for aluminum and aluminum alloys. All linetec anodize finishes are a class i coating, with the exception of ano204 clear, which is a class ii coating. Main properties of natural anodizing corrosion resistance the oxa layer protects the base material from corrosion withstanding 336 hours of exposure to salt mist according to the requirements of the mila8625. Pdf mil a 8625f this amendment forms a part of mila8625f, dated 10 september 1993. Mila8625f anodic coatings, for aluminum and aluminum. The mili45208 inspection system quality manual is a standalone document.
A teflon hardcoat will also lower the coefficient of friction, up to 50% lower than that of hard anodizing, making it more slippery. I i i coatingtype i coating height mgft2 i 1 and ib 200 minimum ic1 200minimum 700maximum i ii minimum iib 200m10imum maxlnfum i j coatingweightsover 700mgft2 may be used if speclfled. Clear anodize is available in both class i and class ii. This report documents evaluations of trivalent chromium compositions tcp as sealers for mila8625f type ii, iib, and ic anodic coatings conducted from march 2001 through december 2007 by materials engineering, air4. State of jefferson upper receiver limited edition upper. Class i anodize is used on the exterior of architectural projects. Fused salt oxidizing treatments of milc16173 military. Base materials that mila8625 anodize type iii hard coat anodizing can be applied include 1100, 3000, 5000, 6000, and 7000 series aluminum alloys. Not measurement sensitive i p41la8625f 10 september 1993. This is a nonarchitectural finish and is nearly obsolete due to environmental considerations.
Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts the process is called anodizing because the part to be treated forms the anode electrode of an electrolytic cell. Safs capabilities for military specification anodizing mil a8625. Please note that we are unable to hard anodize 2000 series aluminum due to the high copper content. Amendment by military specifications and standards, 09152003. It is a thin gray film that is not as corrosion resistant as sulfuric acid anodize. Mila8625 type iii class i and ii, ams 2469, and finish 7. Hardcoat anodize or simply hard anodize is a dense anodic coating of aluminum oxide applied by converting a properly cleaned and deoxidized aluminum alloy component into an oxide film using a suitable electrolyte, typically sulfuric acid cooled to nearly freezing, and applied voltages upwards of 100 volts at an applied current density of 2436. This document comes with our free notification service, good for the life of the document.
Lusterless high solids polyurethane topcoat advantages. Hard coat anodizing services mila8625 type 3 aluminum. Mil a8625f anodic coatings, for aluminum and aluminum alloys. Trivalent chromium process tcp as a sealer for mila. Anodic coatings for aluminum and aluminum alloys this amendment forms a part of mil a8625f, dated 10 september 1993, and is approved for use by all departments and agencies of the department of defense. Industrial finishing services industrial finishing types menu.
Anodising increases resistance to corrosion and wear, and provides better adhesion for paint primers and glues than bare metal does. Use references to procedures and forms in the manual as placeholders for your companys existing documents. Limited edition laser engraved we the people state of jefferson upper the buffalo is proud to be the only person making these. This document is available in either paper or pdf format. Mils8879 and as8879 specification, as shown in table 1. Military specification anodic coatings for aluminum and aluminum alloys this amendment forms a part of mila8625f, dated 10 september 1993, and is approved for use by all departments and agencies of the department of defense. Comes complete with forward assist and ejection port cover installed. Mila8625f is the military specification that establishes the requirements for anodizing and sealing processes used for military components ref. Class i anodize coatings are the only finishes that carry a warranty. They meet milprf85285e type i, class h composition and performance specification. Anoblack ec meets mila8625, type ii, class 2 for black sulfuric anodize and has been approved by major aerospace manufacturers for space vehicle applications where emissivity and the ability to withstand high temperatures are both critical. Clean and remove oxidation contamination on surface, followed by treatment with dodp15328d wash primer, e90g4, or chemical pretreat with zinc phosphate. Mil a8625f classification type ii sulfuric anodize alloy. Mila8625, anodize, aluminum anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosionresistant, anodic oxide finish.
Oxa natural anodizing oxa is a natural aluminium anodizing treatment in conformity with mila8625 type ii and iso 7599 standards. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized. Design and application guide for anodizing aluminum. As a frame of reference, however, 2024 aluminum base metal has a hardness in the range of 6070 rockwell b, where type iii anodize has a hardness of 6070 rockwell c. Chem film, hex chrome free mil dtl5541, type ii b 921 8081 anoplates anochem tcp nonhex chrome bearing chrome, decorative qqc320, class 1 b 456 1456 actually nickel with thin chrome overlay chrome, hard qqc320, class 2 2406 b 650 6158. Anoblack ec coatings will not outgas in vacuum environment applications. This milspec covers the requirements for electrochemicallyformed anodic coatings on aluminum and aluminum alloys for nonarchitectural applications. Mila8625f anodic coatings, for aluminum and aluminum alloys.
Mila8625f type ii class 2 black, blue, red mila8625f type iib class 1. Type ii and 116 coatings shall be the result of treating aluminum and a,lum. Mila8625 specifies a test for abrasion resistance to accommodate these challenges. Mil mila8625f amendment 1 anodic coatings for aluminum and aluminum alloys. Chemical conversion coatings play an important role as a coatingalone or for its enhanced adhesion properties. Overview of anodizing in the aerospace industry a s the aerospace industry demands more from the materials it uses, the finishing of the surface becomes a greater part of the final product.
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