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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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

Your Metal Finishing Solution. Chromate conversion coatings are normally applied by dipping: Yes, a rough correspondence between what comprises class 2 vs. 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.

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

ASTM B-449 Spec for Chromating Aluminum

It is commonly used for an undercoat for paint or adhesive applications due to the excellent bonding properties it provides. Link to Active This link will always route to the current Active version 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.

No other units of measurement are included in this standard. Referenced Documents purchase separately The documents listed below b494 referenced within the subject standard but are not provided as part of the standard. Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. We test coating wt. Aluminum and aluminum alloys are chromate coated in order to retard corrosion; atsm a base for organic films including paints, plastics, and adhesives; and as a protective coating 4b49 a low electrical contact impedance.

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July 21, Q.

Class 1A- Yellow For maximum protection against corrosion, painted or unpainted. Chromate conversion coatings are the most widely used coating for corrosion protection of Aluminum and Aluminum alloys minimizing surface oxidation. I can vouch that their pdf delivery works well at least b449 my computer, it did Class 1A- Clear For maximum protection against corrosion, painted or unpainted. Class 1; Class 2; Class 3; and Class 4. It is informational only and not an official part of the standard; the full asttm of the standard itself must be referred to for its use and application.

Joe Roter – Chatsworth, California, U. We test coating wt.

ASTM B Spec for Chromating Aluminum

It compares favorably with the hexavalent coatings providing a conversion coating that fulfills the corrosion, paint and electrical requirements of the different specifications. From beautiful Pine Beach New Jersey: Type II- Compositions containing no hexavalent chromium 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.

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.

Both Hexavalent and Trivalent films at Advanced Surface Technologies have asfm initial hour salt spray testing and are subject to monthly hour salt spray testing as well as paint adhesion testing conforming to all specifications.

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Not sure my question was to the point. Greg, it sure looks like it is available from ASTM 4b49 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 included in our internal testing matrix, but none of our customers require it and I can not find it in Wstm, so I would like to remove it from monthly testing.

This abstract is a brief summary of the referenced standard. Class 3- Clear For protection against corrosion where low electrical resistance is required. Class 3- Clear For protection against corrosion where low electrical resistance is required.

Greg, it sure satm like it is available from ASTM at: 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.

S October 11, A. This specification covers the requirements relating to rinsed and non rinsed chromate conversion astn on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings. No other units of measurement are included in this standard. 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 ast 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.