Hexavalent chromates do not perform as well when subjected to elevated temperatures. Chemical conversion materials for coating aluminum and aluminum alloys. There are definitely a couple of tricks to passing mil dtl 5541f, type ii, class 1a for al 2024, and they apply to type i, also. The military specification referred to as mil dtl 5541, military specification, chemical conversion coatings on aluminum and aluminum alloys covers chemical conversion coatings formed by the reaction of chemical conversion materials with the surfaces of aluminum and aluminum alloys. This family of compounds is formulated to provide a conversion coating on aluminum that will meet a military specification, mil dtl 5541f, which describes chemical conversion coatings on aluminum and aluminum alloys, and mil dtl 81706 that describes the processes certified for use. Anochem tcp has a bluebright finish without characteristic iridescent yellow color of chromate conversion coatings commonly referred to as alodine. Delete milc81706 chemical conversion materials for coating aluminum and aluminum alloys. Qualification of conversion coatings that meet this specification are governed by mil dtl 81706 detail specification. Status of nonhex chromates on the qpl for milc5541. Mildtl 81706b under authorization of reference authorizing letter. Meets mil spec requirements for aluminum conversion coating. It shall be free from areas of powdery or loose coating, voids.
Mil dtl 81706 type 2 class 1a and 3 approved and meets other major oem qualifications bonderite mcr 871 aero touchnprep coating is a trichrome dryinplace conversion coating designed for use on aluminum and its alloys. These conversion coatings are typically too thin to be measured accurately, and color especially with hex chrome is used as an indicator of relative thickness, goldbronze being thickest to iridescentclear being thinnest. This specification does list the applicator pen as an option under methods of application. Aa59464 mil p20689 plastisol mil dtl 5541 mil dtl 81706 aluminium pretreatments mil dtl 16232 phosphates mil dtl 53072 carc painting mil std171 ttc490 pretreatments. Chemical conversion materials for coating aluminum and. Touchnprep alodine pen implementation at boeing st. Amendment by military specifications and standards, 04092019. Through conversations with others, i was able to grasp the difference between mil dtl 81706 and mil dtl 5541 and wanted to post for anyone else who may have questions about it. Jun 01, 2018 there are definitely a couple of tricks to passing mildtl5541f, type ii, class 1a for al 2024, and they apply to type i, also. Mildtl81706b chemical conversion materials for coating. Chemical conversion materials used in the formation of coatings by the reaction of the material with the surfaces of aluminum and aluminum alloys. The trivalent chromium process tcp provides a non hexavalent chrome coating compliant with rohs, elv and weee directives.
Hf hexavalent free pretreatment designed for aluminum and other metals developed and licensed by the united states navy navair. Bonderite mcr 1201 aero known as alodine 1201 is used as received for mil dtl 5541 work. 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. This 100% hexavalentchromium free conversion coating exceeds the requirements of mil dtl 5541, and results in a harder, denser and more abrasion resistant finish than chromate coatings it replaces. Mildtl5541 chemical conversion coatings on aluminum. Inchpound mildtl81706b 25 october 2004 superseding. Mil dtl 81706 april 9, 2019 chemical conversion materials for coating aluminum and aluminum alloys a description is not available for this item. Adjustments and titrations are not needed or required. The military specification referred to as mildtl5541, military specification, chemical. The issue that is in question is the mil c5541 link is to free spec at defense logistics agency, dla. The name, alodine is a registered trade name of henkel surface technologies. Mil dtl 81706a 18 february 2002 superseding mil c 81706 30 june 1970 detail specification chemical conversion materials for coating aluminum and aluminum alloys this specification is approved for use by all departments and agencies of the department of defense. General plating provides services in metal plating and has the capabilities for plating of 17 finishes and specs.
Currently, only the trivalent chromate formulation developed by navair is listed in the mil dtl 81706 link is to free spec at defense logistics agency, dla. Aluminum surfaces must be chemically cleanthey produce a waterbreakfree. Chromate conversion coating alodine mil c 81706 mil dtl 81706. Here is a quote from mil dtl 5541f materials qualified under mil dtl 81706 produce coatings that range in color from clearcolorless to iridescent yellow, brown, gray, or blue. Mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys this list has been prepared for use by or for the government in the acquisition of products covered by the subject specification and such listing of a product is not intended to and does not connote endorsement of the product by the department of defense. Henkel alodine 600 light metals conversion coating.
Bonderite mcr 1201 aero known as alodine 1201 is approved to mil dtl 81706 for brush application only. The military specification referred to as mildtl 5541, military specification, chemical conversion coatings on aluminum and aluminum alloys covers chemical conversion coatings formed by the reaction of chemical conversion materials with the surfaces of aluminum and aluminum alloys. Qualified product list of products qualified under performance specification mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys this qpl has been prepared for use. Mildtl81706bamendment1 chemical conversion materials for coating 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. The second document mil qpl 81706 governs materials qualified for use under mil dtl 81706. Bonderite mcr 1201 known as alodine 1201 is approved to mil dtl 81706 for brush application only. Npfc mildtl81706 chemical conversion materials for.
How to pass mildtl5541f for aluminum products finishing. Approved products for this specification have been evaluated per mil dtl 81706 and are listed on qpl 81706. The chemical conversion coating shall be continuous in appearance and visibly discernible in daylight. Department of defense was the first to use tcphf trivalent chromium, hex free and this trivalent chromate conversion coating has become such an accepted standard that a detailed specification, mildtl 5541, included it. Final test report hexavalent chrome free coatings for.
Difference between milc5541e, amsc5541, and mildtl. Mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys this specification covers chemical conversion materials used in the formation of coatings by the reaction of the material with the surfaces of aluminum and aluminum alloys. Qualified product list of products qualified under performance specification mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys his qpl has been prepared for use by. The area to be touched up shall be not greater than 5 percent of the total item surface area see 6. Tcphf withstands temperatures that meet mildtl 81706b 250f allowing for greater process flexibility. Mildtl81706, class 1a and class 3, form vi, method d step 1. Mila8625f anodic coatings, for aluminum and aluminum. Mil dtl 81706b chemical conversion materials for coating aluminum and aluminum alloys. Qpl qpl 81706 16 chemical conversion materials for coating aluminum and aluminum alloys superseding qpl 81706 15 listing directory index by qualified products list, 09282001 amendments available. Mil p14105 paint, heat resistant for steel surfaces mil dtl 53022 primer, epoxy coating, corrosion inhibiting, lead and chromate free. Mil dtl 53072e 09 may 20 superseding mil dtl 53072d 20 december 2010. B chemical conversion materials for coating aluminum and aluminum alloys from sai global.
Mil dtl 81706b 25 october 2004 superseding mil dtl 81706a 18 february 2002 detail specification chemical conversion materials for coating aluminum and aluminum alloys this specification is approved for use by all departments and agencies of the department of defense. Government and are not subject to protection in the u. The third document mil c5541 specifies the performance characteristics of chemical conversion films on aluminum. Mil dtl 81706 mil c5541 class 3 rohs thermalloy mil c5541 astm b 117 citizen aavid thermalloy c554 aavid catalog. Qpl approved chemistries for chromate conversion chemeon. Mila8625f anodic coatings, for aluminum and aluminum alloys. Paint lines shall be cleaned out after every paint application. Mildtl81706 type 2 class 1a and 3 approved and meets other major oem qualifications bonderite mcr 871 aero touchnprep coating is a trichrome dryinplace conversion coating designed for use on aluminum and its alloys. Mil dtl 81706b chemical conversion materials for al mil dtl 81706b chemical conversion materials for al.
All paint lines shall be kept free from oil and water condensation by blowing out the lines as necessary. Wet a beartex, scotchbrite or other similar abrasive pad materials with. Products that are qualified are listed in the qualified products list qpl 81706. The current specification 2009 is mil dtl 5541f, which.
Mildtl81706 historical revision information chemical conversion materials for coating aluminum and aluminum alloys mildtl81706 revision a superseded see the following. A specification that states design requirements, such as materials to be used, how a requirement is to be achieved, or how an item is to be fabricated or constructed. I, and i assume most everyone else too, have been watching and waiting for a nonhex conversion coating to get listed on the qpl for milc5541 link is to free spec at defense logistics agency, dla. Suppliers develop materials and processes that are approved for use after much testing. Mil mil dtl 81706b chemical conversion materials for coating aluminum and aluminum alloys superseding mil dtl 81706a standard by military specifications and standards, 10252004 amendments available. First, we highly recommend using an allpurpose, nonetch lightmetal cleaner. Mil mildtl 81706b chemical conversion materials for coating aluminum and aluminum alloys superseding mil dtl 81706a standard by military specifications and standards, 10252004 amendments available. Often, sodium metasilicate is used as a builder for lightmetal cleaners. Aa52474 commercial item description, electrocoating primer water borne, cathodic epoxy.
The us defense standards, commonly referred to as milspec, are developed by the us dod for the purpose of enhancing interoperability among critical defense systems. Mil mil dtl 81706b notice 1 validation 1 chemical conversion materials for coating aluminum and aluminum alloys. The goal of the standards is to provide precise descriptions on the procedures and practices for the design, manufacturing, and deployment of military devices and equipment. Bonderite mcr 1201 known as alodine 1201 is used as received for mil dtl 5541 work. This document comes with our free notification service, good for the life of the document. Qpl 81706 20161103 qualified product list of products qualified under performance specification mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys this qpl has been prepared for use by or for the government in the acquisition of products covered by the subject specification and inclusion. A united states defense standard, often called a military standard, mil std, mil spec, or informally. Difference between milc5541e, amsc5541, and mildtl541f. Nov 30, 2018 qpl 81706 pdf henkel qpl approved conversion coatings for the aerospace industry. Mffp metal finishes and finishing processes and procedures. So far the mildtl81706 link is to free spec at defense logistics agency, dla. Mil dtl 81706b1 the qualified product list for the following governing specification was last updated on 02apr2020. Tcphf has performed as well or better than hexavalent chromates in a variety of applications and tests.
Mil c5541e, mil dtl 5541f, astm b 44993 2004, ams 2473g, ams 2474d and mil dtl 81706b. Mildtl81706 chemical conversion materials for coating. Inchpound mildtl53072e superseding 20 december 2010 detail. Mil dtl 81706 covers the requirements for the chemical materials used in the formation of conversion coatings by the reaction of the material and the surfaces of aluminum and aluminum alloys. May 2, 2006 chemical conversion materials for coating aluminum and aluminum alloys.
Buy henkel alodine 600 light metals conversion coating at skygeek to produce a chromate conversion coating on aluminum and its alloys. Mil dtl 81706 chemical conversion materials for coating aluminum and aluminum alloys. Previous testing has been performed to down select trivalent formulations and processes that are capable of providing resistance to general corrosion, while maintaining low dc surface resistivity. This document is available in either paper or pdf format. Henkel alodine 1200s conversion coating mildtl81706. What is alodine chem film chromate conversion coating. Nonhexavalent chemical conversion films on aluminum. If a solvent is used, do not allow the solvent to dry on the surface, but remove the solvent and dry the surface with a clean lint free cloth. Mil dtl 53030 primer coating, epoxy, water based, lead and chromate free.
Mildtl5541 chemical conversion coatings on aluminum and. Mildtl 5541 chemical conversion coatings on aluminum and aluminum alloys. The current specification 2009 is mil dtl 5541f, which superseded mil c5541e in july 2006. This procedure involves applying an electrode pressure of 200. Most backordered items can be rushed in from the publisher in as little as 24 hours. The coating shall also be free from breaks, scratches, flaws, or other defects that will reduce serviceability or be detrimental to appearance. Delete mil c 81706 chemical conversion materials for. Hexavalent chrome free coatings for electronics applications. Henkel alodine 1200s conversion coating mildtl81706 class. Management manual, or the designated shelflife points of contact poc. I agree, ted the biggest difference between mil c5541e and mil dtl 5541f is that the buyer can ask for a type ii coating which will contain no hexavalent chromium.
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