ASTM B Standard Specification for Chromates on Aluminum. Advanced Plating Technologies, a Milwaukee company, offers Aluminum Chromate Conversion Coatings per MIL-C (MIL-DTL) and ASTM B Designation: B – 93 (Reapproved )´1Standard Specification for Chromates For referenced ASTM standards, visit the ASTM website, .org, or.

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From beautiful Pine Beach New Jersey: Type II- Compositions containing no hexavalent chromium Class 1A- Clear For maximum protection against corrosion, painted or unpainted. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

This specification covers the requirements relating to rinsed and non rinsed chromate conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings. Class 1; Class 2; Class 3; and Class 4. Class 1- Yellow to Brown, Maximum corrosion resistance generally used as final finish Class 2- Colorless to yellow, Moderate corrosion resistance, used as a paint base and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion resistance, low electrical contact resistance Class 4- light green to green, Moderate corrosion resistance, used as a paint base and for bonding to rubber Not done at AST.

July 21, Q. S October 11, A. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. S October 11, A. I can vouch that their pdf delivery works well at least on my computer, it did ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

ASTM B-449 Spec for Chromating Aluminum

qstm Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Chromate Conversion Coating also commonly referred to as Chemical Film, Chem Film, Alodine or Iridite converts the surface properties of the substrate typically aluminum or magnesium as compared to plating which applies a coating onto the surface of the substrate.

Those specs are somewhat similar, but I do not think there is any claim that they are “technically equivalent”. This specification covers the requirements relating to rinsed and non rinsed chromate conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings. Aluminum and aluminum alloys are chromate coated in order to retard corrosion; as a base for organic films including paints, plastics, and adhesives; and as a protective asttm having a low electrical contact impedance.

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It is informational only and not an official part b the standard; the full text of the standard itself must be referred to for its use and application. Link to Active This link will always route to the current Active version of the standard. Thank you for your help. Your Metal Finishing Solution.

No other units of measurement are included in this standard. Class 1A coatings give maximum corrosion protection with the highest electrical surface resistance while class 3 coatings have lower corrosion protection and provide lower electrical surface resistance.

Joe Roter – Chatsworth, California, U. Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0.

I can vouch that their pdf delivery works well at least on my computer, it did Class 1A- Clear For maximum protection against corrosion, painted or unpainted. Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. Chromate Classes Class 1- Yellow to Brown, Maximum corrosion resistance generally used as final finish Class 2- Colorless to yellow, Moderate corrosion resistance, used as a paint base and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion resistance, low electrical contact resistance Class 4- light green to green, Moderate corrosion resistance, used as a paint base and for bonding to rubber Not done at AST.

It is commonly used for an undercoat for paint or adhesive applications due to the excellent bonding properties it provides. Chromate conversion coatings are normally applied by dipping: Historical Version s – view previous versions of standard.

ASTM B – 93() Standard Specification for Chromates on Aluminum

Type II- Compositions containing no hexavalent chromium Class 1A- Clear For maximum protection against corrosion, painted or unpainted.

It compares favorably with the hexavalent coatings providing a conversion coating that fulfills the corrosion, paint and electrical requirements of the different specifications. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Chromate conversion coatings are the most widely used coating for corrosion protection of Aluminum and Aluminum alloys minimizing surface oxidation.

October 9, A. Advanced Surface Technologies extensive experience with the chromate process enables us to effectively process cast and all the different wrought alloys with alloy specific pre-treatment chemistries.

It is included aztm our internal testing matrix, but none of our customers require it and I can not find it in MIL-C, so I would like to remove it from monthly testing.

ASTM B Spec for Chromating Aluminum

Greg, it sure looks like it is available from ASTM at: Thank you for your answer. It is included in our internal testing matrix, but none of our customers require it and I can not find it in MIL-C, so I would like to remove it from monthly testing. Class 1- Yellow to Brown, Maximum corrosion resistance generally used as final finish Class 2- Colorless to yellow, Moderate corrosion resistance, used as a paint base and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion aztm, low electrical contact resistance Class 4- light green to green, Moderate corrosion resistance, used as a paint base and for bonding to rubber Not done at AST.

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Chromate Classes Class 1- Yellow to Brown, Maximum corrosion resistance generally used as final finish Class 2- Colorless to yellow, Moderate corrosion resistance, used as a paint base and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion resistance, low electrical contact resistance Class 4- light green to green, Moderate corrosion resistance, used as a paint base and for bonding to rubber Not done at AST.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. Class 3- Clear For protection against corrosion where low electrical resistance is required.

Both Hexavalent and Trivalent films at Advanced Surface Technologies have passed initial hour salt spray testing and are subject to monthly hour salt spray testing as well as paint adhesion testing conforming to all specifications. Class 1A- Clear For maximum protection against corrosion, painted or unpainted.

It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test. Yes, a rough correspondence between what comprises class 2 vs. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. It is informational only and not an official part of the standard; the full text of the standard itself must be referred aetm for its use and application.

Materials qualified produce coatings that range in color from clear to iridescent yellow or brown. Yes, a rough correspondence between what comprises class 2 vs. Not sure my question was to the point.