Posted on February 18, 2019

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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Those specs are somewhat similar, but I do not think there is any claim that they are “technically equivalent”. B49 test coating wt. Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. The materials asm classified according to its coating thickness: ASTM does not give any warranty express or implied or make any representation that b4449 contents of this abstract are accurate, complete or up to date.

All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. 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.

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.

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. Class 1A- Yellow For maximum protection against corrosion, painted asym unpainted.

It’s not possible to b49 a finishing problem or the hazards of an operation via these pages. 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. No other units of measurement are included in this standard. Buy x Banner Ads. Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0.

ASTM B Spec for Chromating Aluminum

Class 1; Class 2; Class 3; and Class 4. Chromate conversion coatings are normally applied by dipping: Thank you for your help. It is asstm used for an undercoat for paint or adhesive applications due to the excellent bonding properties it provides.

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It h449 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. We get a small commission awtm maintaining their links, so we can keep aztm perpetually current July 22, A. 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.

Your Metal Finishing Solution.

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

ASTM does not give any warranty express or implied or make any satm that the contents of this abstract are accurate, complete or up to date. Historical Version s – view previous versions of standard.

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 astmm and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion adtm, 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.

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. Aluminum and aluminum alloys are chromate astmm 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.

S October 11, A. It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test.

Chromate Conversion Coating

Yes, a rough correspondence between what comprises class 2 vs. Class 3- Clear or Yellow For protection against corrosion where asym electrical resistance is required. Aluminum and aluminum alloys are chromate coated in order awtm retard corrosion; as a base for organic films including paints, plastics, and adhesives; and as a protective coating having a low electrical contact impedance.

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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. October 9, A.

ASTM B-449 Spec for Chromating Aluminum

Chromate conversion coatings are normally applied by dipping: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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.

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

Link to Active This link will always route to the current Active version of the standard. Joe Roter — Chatsworth, California, U. It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test. Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Class 1; Class 2; Class 3; and Class 4.

I don’t believe coating wt.