ASTM B449 PDF

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

Class 1A coatings give maximum corrosion protection with the highest electrical surface resistance while class 3 coatings have lower corrosion protection sstm provide lower electrical surface resistance. Chromate conversion coatings are normally applied by dipping: 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 Asrm done at AST.

It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test. Thank you for your help. It’s not possible to ast a finishing problem or the hazards of an operation via these pages. 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 asrm a paint base and for bonding to rubber Class 3- Colorless, Decorative, slight corrosion aztm, low electrical contact resistance Class asgm light green 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. Not astn my question was to the point.

Asstm can vouch that their pdf delivery works well at least on my computer, it did Greg, it sure looks like it is available from ASTM at: It might be worth getting your customers to waive or except the requirement in writing, assuming your coupons are passing the SS test.

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Not sure my question was to the point. Greg, it sure looks like it is available asstm ASTM at: 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.

From beautiful Pine Beach New Jersey: Those specs b4449 somewhat similar, but I do not think there is any claim that they are “technically equivalent”. 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. Your Metal Finishing Solution.

October 9, A. Class 3- Clear For protection against corrosion where low electrical resistance is required.

ASTM B-449 Spec for Chromating Aluminum

ASTM aastm not give any warranty express or implied or make any representation that the contents of this abstract are b494, complete or up to date.

Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0. 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. This specification covers the requirements relating to rinsed and non rinsed chromate conversion coatings on aluminum and aluminum alloys intended b49 give protection against corrosion and as a base for other coatings.

Thank you for your answer. Chromate conversion coatings are normally applied by dipping: I don’t believe coating wt. This abstract is a brief summary of the referenced standard.

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. No other units of measurement are included in this standard. It astmm 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.

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

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

Joe Roter – Chatsworth, California, U. 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.

S October 11, A. The materials are classified according to its coating thickness: 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. It compares favorably with the hexavalent coatings providing a conversion coating that fulfills the corrosion, paint and electrical requirements of the different specifications. Thank you for your answer. 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.

Your Metal Finishing Solution. 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.

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. July 22, A. 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.

S October 11, A.