Chem corrosion resistant coating part number milc5541 nsn 8030014510284. Mil dtl 5541 covers all chemical conversion coatings which are known to create protection through chemical reaction with metals like aluminum and aluminum alloy. Custom formulations baychem is an industry leader in custom formulated surface technology and metal finishing chemical products. This specification covers chemical conversion coatings formed by the reaction. To accelerate the curing process, heat may be applied up to but not more than 60c. The military spec referred to as mildtl5541, military specification, chemical conversion coatings on aluminum and aluminum alloys. Additional features of these military grade, 10contact solutions include. Mil c 5541f, chemical films, chromate iridite, aluminum chemical film coatings are gelatinous films which provide some sort of a barrier medium to retard corrosion on aluminum surfaces and enhance adhesion of subsequent coatings such as paints and primers. Coatings of this type may be used, for example, on tanks, tubing and component structures where paint finishes are not required for.
Milc82 may react violently with highly reactive materials such as alkali and alkaliearth metals, e. Metallic coating, electroless nickel sae amsc26074, or mildtl32119 where. Click here to download deoxidine material safety data sheet msds click here to download alodine 1201 material safety data sheet msds. The specification is approved for use by all departments. The chromate process provides a clear iridescent to slightly golden iridescent film of low contact resistance per milc5541 mildtl5541 and astm b44993. Mil dtl 5541 also has established two types of chem film coating. Mil dtl 5541 chemical conversion coatings on aluminum and aluminum alloys this specification covers chemical conversion coatings formed by the reaction of chemical conversion materials with the surfaces of aluminum and aluminum alloys. Clear chromate rohs compliant mil c 5541 type i, class 1a mil dtl 5541 astm b449 ams 2473 mil std 171 finish no. Mil c 5541 link is to free spec at defense logistics agency, dla. Milc5541 mildtl5541 show complete document history. The black chrome surface may be waxed ot oiled to darken the surface. Coatings shall be continuous free from powdery areas, breaks, scratches, etc. The current specification 2009 is mil dtl5541f, which superseded mil c 5541e in july 2006.
This was formerly known as milc5541 and is another of our alltime bestselling plating specs. The specification is approved for use by all departments and agencies of the united states department of defense dod. Anodize sulfuric nondyed clear sulfuric acid anodize mil a8625 type ii, class 1 ams2471 astm b580 type b thru f 7. Milc5541 class 3 receives contact resistance testing. Chromate conversion coating mildtl5541 post treated with a paint or. Mil dtl5541f 11 july 2006 superseding mil c 5541e 30 november 1990 detail specification chemical conversion coatings on aluminum and aluminum alloys this specification is approved for use by all departments and agencies of the department of defense. The current specification 2009 is mildtl5541f, which superseded milc5541e in july 2006.
We are nadcap certified, as9100 c and itar registered. Mil c 5541e, mil dtl5541f, astm b 44993 2004, ams 2473g, ams 2474d and mil dtl81706b. Aluminum chromate conversion coatings are amorphous in structure with a gellike composition hydrated with. Electroless nickel plating is an process that codeposits a nickelphosphorous alloy without need for an externally applied electrical current.
Im not having any luck with my current suppliers and have started questioning if such a coating exists. The military specification referred to as mildtl5541, 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. Part number mil c 5541 including related part numbers and nsn starting at page 1. Electrolurgy performs chem film to mildtl5541 for aerospace and general industry in irvine, ca. Chem corrosion resistant coating part number mil c 5541 nsn 8030014510284.
Milc5541e, mildtl5541f, astm b 44993 2004, ams 2473g, ams 2474d and mildtl81706b. Type i compositions containing hexavalent chromium. Mil mildtl5541f chemical conversion coatings on aluminum and aluminum alloys superseding milc5541e standard by military specifications and standards, 07112006 amendments available. The clear alternative to traditional yellow hex films. In addition to the coating or coating thickness see 6. Milc5541 link is to free spec at defense logistics agency, dla. Milc5541, class i a, 3 mildtl5541 type i, ii class ia, 3 ams 2473 type i, class ia coating yellow in appearance maximum corrosion resistance type i, class 3 coating clear or yellow in appearance type ii, class 3 coating clear rohs compliant conductive coating excellent base or primer for painting. One side of the part is to be processed per milc5541, class 1a, then primed. One side of the part is to be processed per mil c 5541, class 1a, then primed. Iridite chromate conversion coating finish milc5541.
Mil mil dtl5541f chemical conversion coatings on aluminum and aluminum alloys superseding mil c 5541e standard by military specifications and standards, 07112006 amendments available. Electroless nickel plating per mil c 26074, astm b733 and ams 2404. Electroless nickel plating an overview electroless nickel plating is offered by advanced plating technologies in both type iv medium phosphorous 69% p and type v high phosphorous 1014%. Milc5541 chem corrosion resistant coating aerobase. Alodine 1200 methods and properties are defined by mildtl5541f formerly. Type 1 this includes all coatings that have hexavalent chromium. My second choice to surrender would be mil c 5541, but my first choice would be color. Chemical film chem film coatings are gelateneous films which provide some sort of a barrier medium to retard corrosion on aluminum surfaces and enhance adhesion of. A print callout might read passivate per mildtl5541 type.
The specification is approved for use by all departments and agencies of the united states department. The only rohscompatible mil c 5541 compliant coating is tcp because thats the way mil c 5541 is written. Conversion coatings for aluminum meets requirements of military specifications. Copper contacts are gold plated and rated for 3000 mate and demate cycles. Description 650 chromital tcp is a rohs, reach compliant and qpl approved liquid chemical used to form a protective conversion coating on aluminum surfaces without the use of hexavalent chromium. The military specification referred to as mildtl5541, military specification, chemical conversion coatings on aluminum and aluminum alloys covers.
The product is a dropin replacement for its hexavalent counterparts. The tcp process compares favorably with its hexavalent counterparts in providing a conversion coating on aluminum which meets or exceeds the requirements of milc5541, type 1a and type 3. Milc5541 chem corrosion resistant coating aerobase group. I have special request from a customer to meet the mil c 5541 class 3 in a gold or yellow rohs compliant chem. Mildtl5541 type i specifies hexavalent chromium bath while mildtl5541 type ii is normally achieved with a trivalent chromium bath. Mil dtl 5541 type ii, class 1a and class 3 rohs compliant astm b921 class 1a and class 3 rohs compliant we are an approved supplier for. Anochem tcp has a bluebright finish without characteristic iridescent yellow color of chromate conversion coatings commonly referred to as alodine. This kind of film usually looks brown or gold, but can be colorless at times. Is there a white paper or guide out there that when and why type i really needs to be used i have a person at work that thinks that type ii is colorless and is using type. Mildtl5541 covers all chemical conversion coatings which are known to create protection through chemical reaction with metals like aluminum and aluminum alloy. Mildtl5541f chemical conversion coatings on aluminum and. I need to know when to use type i and not to use type i finish. Chromate conversion coating chem film, also widely referred by the brand names alodine or iridite, is the application of a chromate conversion coating on aluminum alloys.
Class 1a chemical conversion coatings are intended to provide corrosion resistance when left unpainted as well as to improve adhesion of paint finish systems on aluminum and aluminum alloys. And tcp is very thin and for that reason nondyeable. Another important quality is the ability to heal small scratches due to being soluble. Mildtl5541 chemical conversion coatings on aluminum and aluminum alloys this specification covers chemical conversion coatings formed by the reaction of chemical conversion materials with the surfaces of aluminum and aluminum alloys. Electroless nickel plating per milc26074, astm b733, ams 2404. Contact ens technology regarding chromate conversion coating mil dtl 5541 today. Milc5541 class 1a indicates maximum corrosion resistance and a more stringent corrosion test is specified. Mildtl5541 chemical conversion coatings on aluminum. Milc26074c 3 my les5 military specification this specification ie approved for we by all departfmnta and agencie8 of the oapartmmt of defense. Milc5541 class 1a provides the heaviest coating, while class 3 is a lighter variation. Class 3 we can process to mildtl 5541 tyii clear chem film, rohs compliant.
Anodize sulfuric nondyed clear sulfuric acid anodize mila8625 type ii, class 1 ams2471 astm b580 type b thru f 7. Electroless nickel plating per milc26074, astm b733, ams. Please use the below content for reference only the chromate process provides a clear iridescent to slightly golden iridescent film of low contact resistance. Although prepared specifically for dod applications, the standard is used for many commercial applications as well. It shall approximate color plate 37038 of fed std no. Mildtl5541 chemical conversion coatings on aluminum and. Mildtl5541f 11 july 2006 superseding milc5541e 30 november 1990 detail specification chemical conversion coatings on aluminum and aluminum alloys this specification is approved for use by all departments and agencies of the department of defense. Chem film chromate conversion coatings electrolurgy. 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. This 100% hexavalentchromium free conversion coating exceeds the requirements of mildtl5541, and results in a harder, denser and more abrasion resistant finish than chromate coatings it replaces. As specified on drawing color is a dull gray, approaching black. Is there a white paper or guide out there that when and why type i really needs to be used. Chromate leaves no measurable buildup, but provides excellent corrosion resistance. The mildtl5541 specification current revision is mildtl5541f covers chemfilm aka alodine or chromate conversion on various aluminum alloys.
The trivalent chromium process tcp provides a non hexavalent chrome coating compliant with rohs, elv and weee directives. I have a person at work that thinks that type ii is colorless and is using type i with out really being needed to provide color i think he is confused with. Mildtl5541 also has established two types of chem film coating. Nov 29, 2014 the current specification 2009 is mil dtl5541f, which superseded mil c 5541e in july 2006. Highly reactive materials should not be brought into contact with milc82. The electroless nickel phosphorous content affects the properties of the deposit significantly including hardness, corrosion resistance and magnetism. Aluminum chromate conversion coatings aluminum chromate conversion coatings properties. Qpl number 81706 milc5541 document id mildtl81706b, type ii, class 1a, form i, method c. Yellowclear iridite, mil c 55411 class 1a, 3, chemical films, chromate iridite, aluminum chemical film or chromate conversion is widely used. Part number milc5541 including related part numbers and nsn starting at page 1.
Military specification this specification ie approved for. The chemical conversion coatings are of the following types. It protects aluminum substrates from corrosion and serves as a base for organic coatings while leaving dimensions unchanged. Although alchrome tri tec claims to have a product that meets this. Chemfilm is applied by dipping, spraying or brushing. Aluminum chromate conversion coating advanced plating. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. Military specification this specification ie approved for we. Chemfilm nadcap accredited chemfilm, sometimes called aluminum chromate, alodine or iridite, is a chemical conversion coating that is used to passivate aluminum. Wikiproject military history rated startclass this article is within the scope of the military history wikiproject.
Mil c 26074c 3 my les5 military specification this specification ie approved for we by all departfmnta and agencie8 of the oapartmmt of defense. Color can vary from colorless to golden iridescent brown. Report problem email mffp metal finishes and finishing processes and procedures. Aluminum chromate conversion coatings, often referred to as chemical film or under the trade names alodine or irridite, produce a thin coating in the range of 0. Mil c 5541 class 1a provides the heaviest coating, while class 3 is a lighter variation.
Eaton offers a comprehensive range of mil dtl10544 plugs and receptacles in panel mount and cable mount configurations. Type i is the traditional hexavalent chrome based coating that is most recognizable by its color that can range anywhere from yellow to gold to green to brown, and even clear upon request. Our facility houses large rack tanks capable of immersing parts up to 24. Aluminum chromate conversion coatings per mil c 5541 mil dtl 5541 and astm b44993 advanced plating technologies no longer offers chromate services. Mildtl5541 type ii, class 1a and class 3 rohs compliant astm b921 class 1a and class 3 rohs compliant we are an approved supplier for. Chemical film coatings are gelatinous films which provide some sort of a barrier medium to retard corrosion on aluminum surfaces and enhance adhesion of subsequent coatings such as paints and primers.