ASTM D3933 PDF

ASTM D Standard Recommended Practice for Preparation of Metal. Surfaces for Adhesive Bonding. ASTM D Standard Guide for. D – Designation: D – 98 AMERICAN SOCIETY FOR TESTING PA Reprinted from the Annual Book of ASTM Standards. D, Method r, and ASTM E involves the etching of aluminum dure is described in ASTM D and involves the application of.

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The method may be revised or supplemented, as necessary, to include methods based on proven performance. I am not an expert, but this would be my guess. Anodize at ASF for minutes.

Ray Handwerker – Bensalem, Pennsylvania. Abrupt differences in color of local areas, except at electrical contact points, from the background color are not acceptable. PAA and Chromic acid anodizing are thin coatings which I wouldn’t expect to have nearly the bad effect on fatigue strength that much thicker coatings like sulfuric anodizing have, yet they are somewhat porous and adhere to the substrate well, while being corrosion resistant.

Already Subscribed to this document. The aluminum cathodes will be dissolved continually in phosphoric acid, shortening your bath life. You can download and open this file to your own d393 but DRM prevents opening this file on another computer, including a networked server.

Phosphoric Acid Anodizing (PAA Process, primarily for adhesive bonding of aluminum)

I would suggest starting there with some of the engineering requirements then go to the PAA spec. So I am now looking for the BAC to get more information. As for my colleague, he studied the standards with the tenacity of an electrical engineer.

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It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. I am working on a project to find alternatives to Phosphoric Acid Anodizing to actually try to eliminate the phosphoric acid.

Improper surface preparation can produce seemingly acceptable bonds that can degrade rapidly with time. From beautiful Pine Beach New Jersey: I am skeptical-any truth to this? It uses sulfuric acid anodizing at many sites, and has a phosphoric acid anodizing operation in one building. These standards reflect many routine and practical applications. The only other anodize treatment called out for bonding prep work is CAA which now brings Hex Chrome into your facility. I wouldn’t be too worried about it until the concentration climbs above what is allowed.

If you see an affordable copy anywhere these days, grab it: In these cases, the presence of color on tool tabs or on the opposite surface, or on undisturbed surfaces, may be evidence that the surface is acceptably anodized. He sought a practical methodology that would yield the necessary data.

March 16, A.

Experience has shown that when adhesively bonded aluminum surfaces which have been prepared in accordance with this guide produce relatively reproducible, durable bonds.

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See D [link v3933 ed.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

I am not an aircraft engineer and cannot give you an authoritative answer; but maybe this help you until someone more knowledgable steps forward. The first is astn by Boeing for adhesive bonding. Many factors, however, apply to shear modulus, tensile strength, and tensile modulus measured by small laboratory specimens in general.

After all, he had unlimited time, but not unlimited money. Small irregularities at points of electrical contact are acceptable. Quality Assurance Provisions 8. Anodize at ASF for minutes. I am working at a US Air Force base.

My colleague, being the inventive sort, had developed a multipurpose astk with potential use in transportation OEM applications.

Use the following formula: Techniques for Adhesives by R. There are better, but cost a lot more.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

Please first verify your email before subscribing to alerts. The spec can be obtained from Boeing commercial division or from some specification clearing houses like aerospheres.

Need more than one copy? The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. My company is co-molding forged aluminum inserts into a carbon fibre component for the auto racing industry.