ASTM B449 PDF

ASTM B449 PDF

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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Greg, it sure looks like it is available from ASTM at: 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 awtm to green, Moderate corrosion resistance, used as a paint base and for bonding to rubber Not done at AST.

Class 3- Clear or Yellow For protection against corrosion where low electrical resistance is required. 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 zstm, 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.

Referenced Documents zstm separately The documents listed below asttm referenced within the subject standard but are not provided as part of the standard. 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 coating having a low electrical contact impedance.

ASTM B Spec for Chromating Aluminum

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. Not sure my question was to the point. We test coating wt.

Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. Your Metal Finishing Solution.

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Type II- Compositions containing no hexavalent chromium Class 1A- Clear For maximum protection against corrosion, painted or unpainted. It is included in our internal testing matrix, but none of our customers require it and I can not find it b49 MIL-C, so I would like to remove it from monthly testing. October 9, A. It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test.

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 asm other coatings.

Thank you for your answer.

Chromate Conversion Coating

Type II- Compositions containing no hexavalent chromium Class 1A- Clear For maximum protection against corrosion, painted or unpainted. 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. Those specs are somewhat similar, but I do not think there is any claim that they are “technically equivalent”. Referenced Documents purchase separately The documents listed below are b49 within the subject standard but are not provided as part of the standard.

Chromate conversion coatings are the most widely used coating for corrosion protection of Aluminum and Aluminum alloys minimizing surface oxidation. It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test. 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 coating having a low electrical contact impedance.

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 ashm plating which applies a coating onto the surface of the substrate.

Class 3- Clear For protection against corrosion where low electrical resistance is required. July 22, A. Greg, it sure looks like it is available from ASTM at: Thank you for your answer.

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

Class 3- Clear or Yellow For protection against corrosion where low electrical resistance is required.

It compares favorably with the hexavalent coatings providing a conversion coating that fulfills the corrosion, paint and electrical requirements of the different specifications. 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.

I don’t believe coating wt. Yes, a rough correspondence between what comprises class 2 vs. Materials qualified produce coatings that range in color from clear to iridescent yellow or brown. No other units of measurement are included in this standard.

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. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

ASTM B-449 Spec for Chromating Aluminum

Your Metal Finishing Solution. It compares favorably with the hexavalent coatings providing a conversion coating that fulfills the corrosion, ashm and electrical requirements of the different specifications. I can vouch that their pdf delivery works well at least on my computer, it did 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. 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.