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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Phosphoric acid anodizing per BAC5555 and ASTM D3933-98

Use the following formula: Sorry for the non-definitive answer. Asttm acid anodizing is porous and provides a substrate for mechanical locking, so I suppose that is why you need it for the adhesion test.

Recently one of my long-time colleagues with an electrical engineering background retired. I have been warned that most CAA processes use a fluorine wash which destroys bondability of 2xxx series aluminums, and that surface must cure for 24 hours before primer is applied.

Your comments are invited either d3933 revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

In theory, his invention had a potential fit in other applications, but he targeted automotive as his first foray to solve a vexing industry problem. The aluminum cathodes will be dissolved continually in phosphoric acid, shortening your bath life. Other considerations include temperature and humidity effects on joint strength, moisture inhibitors, and retaining joint integrity in cyclic environmental conditions. Precision and Bias 9.

We appended your question to a thread which should answer many of your questions without having to wait for replies. Cynthia Gosselin guest blogger, ChemQuest. I would guess that the copper from the alloy could be somewhat to blame, along with whatever dissolved out of your cathodes. Also, are there any alternative platings that can produce the same results? Many factors, however, apply to shear modulus, tensile strength, and tensile modulus measured by small laboratory specimens in general.

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I don’t think this is possible, but I thought I should at least try to post the question. The use of a Ultra Violet system has been mentioned as one possible cure?

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The spec can be obtained from Boeing commercial aatm or from some specification clearing houses like aerospheres. The methods may be revised or supplemented, as necessary, to include d393 based on proven performance. Take a look at this sites “must have” book list.

A specific precaution is given in 5. Subscription pricing is determined by: The phosphoric acid anodized sheets are then pressure bonded. Can anyone tell me asmt equipment is needed to phosphoric anodize aluminum? NOTE 2—A single-rack facility is one with a single anode rack between each set of cathodes. At that time, Phosphoric Anodizing was best for most structural adhesive bonding.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This standard is also available to be included in Standards Subscriptions.

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

There is even a standard related to adhesive odor: Another would be Handbook of Adhesives edited by Skeist. The use of a Ultra Violet system has been mentioned as one possible cure? I am trying to set up a small bench top operation. Ray Handwerker – Bensalem, Pennsylvania.

Please first awtm your email before subscribing to alerts. This test method is also useful for providing information on the durability of other metals and plastics, provided thickness and rigidity are considered. Some applications require more complex information related to aging, durability, flexural strength of laminated assemblies and impact strength.


As the voice of the U. I am not an expert, but this would be my guess. The values given in parentheses are for information only. There shall be no stains, streaks, discoloration, or residue on surfaces of anodized parts after rinsing 5.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

Our PAA plater is getting hardware no roughness specified where the surface has a mirror like finish, probably a RMS. Thank you in d39333 for your help. Nonetheless, if the PAA is being called out for a pretreatment for a subsequent pressure bonding operation than the answer is no, sulphuric acid anodizing is not the coating of choice for a variety of reasons.

Parts should be held in a limited contamination area prior to priming and should not be handled 5. Please first log in with a verified email before subscribing to alerts. We could more easily recycle the waste d333 solution is we could convert the phosphoric acid anodizing bath to sulfuric.

Stiltner, the answers to your questions are partially in the two volume set by Wernick, Pinner and Sheasby, The Surface Treatment of Aluminum and its Alloysand a number of books on pretreatments of aluminum for bonding purposes. Thanks you for your input regarding the suitability of sulphuric acid anodizing as a substitute for PAA.