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. 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. Military specification 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. Delete mil c81706 chemical conversion materials for coating aluminum and aluminum alloys. Trivalent chromium process tcp as a sealer for mila. Industrial finishing services industrial finishing types menu. Alternatives to dichromate sealer in anodizing operations. A teflon hardcoat will also lower the coefficient of friction, up to 50% lower than that of hard anodizing, making it more slippery. Unless otherwise specified, coating will be sealed. This document comes with our free notification service, good for the life of the document. Mila8625f is the military specification that establishes the requirements for anodizing and sealing processes used for military components ref.
Type iii anodize can be performed using polytetrafluoroethylene ptfe based formulas, the bestknown brand name being teflon, and is a very durable anodize solution. Mila8625 anodic coatings for aluminum and aluminum. Class i anodize coatings are the only finishes that carry a warranty. Lusterless high solids polyurethane topcoat advantages.
Mil a8625f classification type ii sulfuric anodize alloy. Mil mila8625f amendment 1 anodic coatings for aluminum and aluminum alloys. This milspec covers the requirements for electrochemicallyformed anodic coatings on aluminum and aluminum alloys for nonarchitectural applications. Base materials that mila8625 anodize type iii hard coat anodizing can be applied include 1100, 3000, 5000, 6000, and 7000 series aluminum alloys. Mila8625f anodic coatings, for aluminum and aluminum. State of jefferson upper receiver limited edition upper. Anodising increases resistance to corrosion and wear, and provides better adhesion for paint primers and glues than bare metal does. Please note that we are unable to hard anodize 2000 series aluminum due to the high copper content. 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. Not measurement sensitive i p41la8625f 10 september 1993. Type ii and 116 coatings shall be the result of treating aluminum and a,lum.
Browse the pdf demo mili45208 quality manual opens in new tabpage. Delete milc81706 chemical conversion materials for coating aluminum and aluminum alloys. They meet milprf85285e type i, class h composition and performance specification. This document is available in either paper or pdf format. Overview of anodizing in the aerospace industry pdf free. 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. Design and application guide for anodizing aluminum. Mil a8625f 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.
Amendment by military specifications and standards, 09152003. Mila8625f anodic coatings, for aluminum and aluminum alloys. Comes complete with forward assist and ejection port cover installed. Chemical conversion coatings play an important role as a coatingalone or for its enhanced adhesion properties. 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. Anoblack ec coatings will not outgas in vacuum environment applications. 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. Mila8625 aluminum, copper, steel, stainless steel, titanium, chromium, nickel mila8625f, military specification. Anodic coatings for aluminum and aluminum alloys 10 sep 1993, this specification covers the. Safs capabilities for military specification anodizing mila8625.
Pdf mil a 8625f this amendment forms a part of mila8625f, dated 10 september 1993. 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. Mils8879 and as8879 specification, as shown in table 1. 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. The mili45208 inspection system quality manual is a standalone document. Class i anodize is used on the exterior of architectural projects. Oxa natural anodizing oxa is a natural aluminium anodizing treatment in conformity with mila8625 type ii and iso 7599 standards. Mila8625 aluminum anodic coatings mila8625 is the military specification for anodic coatings for aluminum and aluminum alloys. Hard coat anodizing services mila8625 type 3 aluminum. Metal salt sealants should not be used on items that will be panted. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized.
It provides details, methods, and procedures for these various coatings. Clean and remove oxidation contamination on surface, followed by treatment with dodp15328d wash primer, e90g4, or chemical pretreat with zinc phosphate. Limited edition laser engraved we the people state of jefferson upper the buffalo is proud to be the only person making these. 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. Clear anodize is available in both class i and class ii. 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. 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. 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.
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