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

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 coatings are normally applied by dipping: Greg, it sure looks like it is available from ASTM at: Chromate conversion coatings are the most widely used coating for corrosion protection of Aluminum and Aluminum alloys minimizing surface oxidation.

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 normally applied by dipping: 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. Not sure my question was to the point. S October 11, A. 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.

Historical Version s – view previous versions of standard. Class 3- Clear or Yellow For protection against corrosion where low electrical resistance is required. Yes, a rough correspondence between what comprises class 2 vs. Class 1; Class 2; Class 3; and Class 4. No other units of measurement are included in this standard. Thank you for your answer. Joe Roter — Chatsworth, California, U. I can vouch that their pdf delivery works well at least on my computer, it did 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.

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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. 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.

Greg, it sure looks like it is available from ASTM at: Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0. But even if you do, I’d suggest that you not certify compliance to a spec you don’t have on hand.

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

I don’t believe coating wt. 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 can vouch that their pdf delivery works well at least asym my computer, it did Class 1A- Clear For maximum protection against corrosion, painted or unpainted.

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. October 9, A. Class 1A- Yellow For maximum protection against corrosion, painted or unpainted.

Thank you for your help. 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 astj 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 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. The materials are classified according to its b49 thickness: 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.

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It might be worth getting your customers to satm or except the requirement in writing, assuming your coupons are passing the SS test. 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.

Chromate Conversion Coating

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. Buy x Banner Ads. S October 11, A. Link to Active This link will always route to the current Active version of the standard. Thank you for your answer. It is commonly used for an undercoat for paint or adhesive applications due to the excellent bonding properties it provides.

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. 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.

Joe Roter – Chatsworth, California, U. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. We test asttm wt. Chromate provides excellent corrosion resistance, is conductive and results in no measurable buildup 0. Type II- Compositions containing no hexavalent chromium Class 1A- Clear 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 asgm and for bonding to ast, 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.

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