Mil c 5541 class 1a pdf file download

The best corrosion protection is provided by chem film per mildtl5541 class 1a. Henkel alodine 12 touchnprep chromate conversion coating. Anochem tcp has a bluebright finish without characteristic iridescent yellow color of chromate conversion coatings commonly referred to as alodine. Focus, aluminum chromate converted per milc5541c finished with highly diffusive white paint wr75 cover gasket precisionformed aluminum, singlepiece chromate converted per milc5541c finished with highly. Milc5541, class i a, 3 mildtl5541 type i, ii class ia, 3 ams 2473. Military specification this specification ie approved for we. Chemical conversion coating mildtl5541 type 2, class 1a hexavalentfree chrome. Class 3 however, also maintains electrical conductivity. Color can vary from colorless to golden iridescent brown. Addresses compositions containing hexavalent chromium. Alodine milc5541 class 3 ams2474 astm b449 class 3 7. This kind of film usually looks brown or gold, but can be colorless at times. Coatings of this type may be used, for example, on tanks, tubing and component structures where paint finishes are not required for. Typical contact resistance of class 3 aluminum chromate conversion coatings is less.

Chemical conversion coatings on aluminum plating per mil dtl 5541 and mil c 5541 conversion coatings for aluminum meets requirements of military specifications mil dtl 5541 specifications aluminum alloys and coatings benefit from additional protective features of conversion coatings. Iridite milc5541 mildtl5541 class 3 ams2474 astm b449 class 3 7. 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. The mess can be achieved by heating the t per the schedule given in 6. Mildtl5541f chemical conversion coatings on aluminum and.

Chem film chromate conversion coatings electrolurgy. Milc5541 document id mildtl81706b, type ii, class 1a, form i, method c document id mildtl81706b, type ii, class 3, form i, method c environmentally safe and non toxic. Qpl number 81706 milc5541 document id mildtl81706b, type ii, class 1a, form i, method c. Type i compositions containing hexavalent chromium. Alodine 1200 methods and properties are defined by mildtl5541f formerly. Iridite chromate conversion coating finish milc5541. Chemical conversion coating mildtl5541 type 2, class 1a.

This film typically appears to be gold or brown in color, but in. We also offer the more traditional process for gold and yellow mildtl5541f class 1a requirements. Class 1a for maximum protection against corrosion, painted or. Even after 168 hours of salt spray testing, class 3 coatings must exhibit electrical resistance at no greater than 10,000 microhms per square inch. Mildtl5541f chemical conversion coatings on aluminum. This specification covers chemical conversion coatings formed by the reaction. 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. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. Pdf corrosion performance of fieldapplied chromate. 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.

This kit contains sufficient chemicals for cleaning and coating approximately 100 square feet of aluminum surface. The current specification 2009 is mildtl5541f, which superseded milc. Milc5541 mildtl5541 show complete document history. Corrosion performance of fieldapplied chromate conversion coatings. Mil c 5541 link is to free spec at defense logistics agency, dla. Chemical nickel milc26074 cancelled, but still used see ams and astm ams2404 ams2405 astm b733 1. It protects aluminum substrates from corrosion and serves as a base for organic coatings while leaving dimensions unchanged. Part number milc5541 including related part numbers and nsn starting at page 1. Coating thickness is varied by immersion time, and as a result, the same conversion. Aluminum chromate conversion coatings are amorphous in structure with a gel.

Difference between milc5541 class 1a and mildtl5541. 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. The trivalent chromium process tcp provides a non hexavalent chrome coating compliant with rohs, elv and weee directives. Coated nonheattreatable aluminum parts shal1 be heated for 1 to 1 12 hours at 375% l 15% 191c ec to irove esion of nickel. Class 1a is for maximum corrosion protection, class 3 is for corrosion protection where low electrical resistance is required. This was formerly known as milc5541 and is another of our alltime bestselling plating specs. 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.

Another important quality is the ability to heal small scratches due to being soluble. Database industry links white papers specification downloads. Mildtl5541 chemical conversion coatings on aluminum. 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. The military specification referred to as mildtl5541, military specification, chemical. This specification covers chemical conversion coatings formed. Mildtl5541 the plating spec poster a handy tool for plating and coating specialists techplates plating and anodizing specifications chart is a handy wall chart developed to summarize a variety of frequently referenced plating specs. Used as a postplating process, chemfilm provides an excellent paint adhesion and a superior base for bonding. Report problem email mffp metal finishes and finishing processes and procedures. The mil dtl 5541 specification covers chemical conversion coatings that form protective coatings by chemical reaction with aluminum and aluminum alloy. Mildtl5541f is a detailed spec for a chemical conversion coating over aluminum. Part number mil c 5541 including related part numbers and nsn starting at page 1.

Electrical contact resistance testing shall be as specified in the contract or order see 6. But you have to download the spec i dont think you can inspect without it. Class 3 chemical conversion coatings provide a corrosion preventive film for electrical and electronic applications where lower resistant contacts, relative to class 1a coatings, and anodic coatings in accordance with mila8625, are required. Aluminum chromate conversion coatings aluminum chromate conversion coatings properties. Aluminum chromate conversion coatings per milc5541 mildtl5541 and astm. Mil mil dtl5541f chemical conversion coatings on aluminum and aluminum alloys superseding mil c 5541e standard by military specifications and standards, 07112006 amendments available. For mil dtl 5541, it is very clear when type ii is mentioned, the conversion coating shall not contain hexavalent chrome, hence, rohs compliant. Class 1a chemical conversion coatings are intended to. One side of the part is to be processed per mil c 5541, class 1a, then primed. Mil c 5541 did not mention type i or ii whereas mil dtl 5541 link is to free spec at defense logistics agency, dla.

Chemfilm, sometimes called aluminum chromate, alodine or iridite, is a chemical conversion coating that is used to passivate aluminum. Sponsored links speed downloads mil c 5541 trusted download 1500 kbs 10 310 mil c 5541 highspeed download 1200 kbs 5 945 mil c 5541 full download kbs 1 290 68 p misc accy mila8625, type ii, class 2. Military specification this specification ie approved for. Coatings shall be continuous free from powdery areas, breaks. I would agree with your new supplier that there is a point at which you can meet both class 1a and class 3, without the need to carry out two separate treatments. Chromate leaves no measurable buildup, but provides excellent corrosion resistance. Mildtl5541 link is to free spec at defense logistics agency, dla. Milc5541, class 3 over qqp416, type ii, class 3 over. Class 3 chemical conversion coatings provide a corrosion preventive film for electrical and electronic applications where lower resistant contacts, relative to class 1a coatings, and anodic coatings in accordance with mil a8625, are required. Chem film per mildtl5541 class 3 is electrically conductive. As established by mildtl5541, both class 1a and class 3 refer to coatings that offer increased corrosion resistance and adhesive properties.

Aluminum chromate conversion coatings to mil c 5541 mil dtl 5541 type i compositions containing hexavalent chromium type ii compositions containing no hexavalent chromium. Apr 02, 2009 chemical conversion coating mildtl5541 type 2, class 1a hexavalentfree chrome. Aluminum chromate conversion coating advanced plating. Mildtl81706a 18 february 2002 superseding milc81706 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. Because class 3 coatings are thinner they are more susceptible to corrosion than class 1a. The specification is approved for use by all departments and agencies of the united.

Type iii class 1 type iii class 2 sulfuric anodize teflon impregnation type i mila 63576 sulfuric anodize is rohs compliant except when used with a dichromate seal. Genset circuit breaker 250a dc breaker circuit breaker 250a 7248 circuit breaker 4 pole 125a text. Class 1a for maximum protection against corrosion, painted or unpainted class 3 for protection against corrosion where low electrical resistance is required. Class 1a for maximum protection against corrosion, painted or unpainted. 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. Clear chromate rohs compliant mil c 5541 type i, class 1a mil dtl 5541 astm b449 ams 2473 mil std 171 finish no. Milc5541 link is to free spec at defense logistics agency, dla.

Surtec 650 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. We offer an rohscompliant clear trivalent chromium process that is free from hexavalent chromium and complies with the requirements of mildtl5541f class 3. Application instructions see section 5 to ensure a uniform coating, the aluminum surface must be clean and deoxidized. Titanium anodize type ii ams 2488 phosphoric acid anodize astm d3933 br 127 astm d393398 conversion coating on aluminum chem film type i class 1a milc 5541 mildtl5541. One side of the part is to be processed per milc5541, class 1a, then primed. These coatings can modify the surface of the aluminum material for improved corrosion resistance, electrical. Pdf milc5541c genset circuit breaker 250a dc breaker circuit breaker 250a 7248 circuit breaker 4 pole 125a. Chemfilm is applied by dipping, spraying or brushing. This article is within the scope of the military history wikiproject. Mil dtl 5541 covers all chemical conversion coatings which are known to create protection through chemical reaction with metals like aluminum and aluminum alloy. Coatings shall be continuous free from powdery areas, breaks, scratches, etc.

Mildtl5541 chemical conversion coatings on aluminum and. 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. 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. Class 3 for protection against corrosion where low electrical resistance is required. Mildtl5541 archives document centers standards forum. Mil dtl5541f 11 july 2006 superseding mil c 5541e 30 november 1990 detail specification chemical conversion coatings. This is a relatively thick film used as a final finish or pretreatment to paint or powder coating, and it is typically gold, brown, or yellow depending on coating weight and alloy. Mildtl5541, type i, class 1a 3 gold milc5541, type ii, class 1a 3 clear qta ensures compliance through quality checks per customer requirements to include. Iridite, alodine milc5541 class 3 mildtl5541 type i class 3 ams2474 astm b44993 class 3 7. Clam 2 coatings shal1 have a ndninum hardness of 700 vickers or equivalent. Qpl number 81706 milc5541 document id mildtl81706b, type ii, class 1a, form i, method c document id mildtl81706b, type ii, class 3, form i, method c.

In a type i coating, the chemical composition contains hexavalent chrome. Milc5541 mildtl5541 type i yellow type ii clear ams2473 astm b449 7. To use this banner, please see the full instructions start. Mildtl5541 chemical conversion coatings on aluminum and aluminum alloys. Aluminum chromate conversion coatings to milc5541 mildtl5541 type i compositions containing hexavalent chromium type ii compositions containing no hexavalent chromium. Milc5541 class 1a provides the heaviest coating, while class. Class 1a coatings are used f or maximum protection against corrosion.