Phosphoric acid anodizing per BAC and ASTM D Q. I am looking for technical information on PAA (phosphoric acid anodizing). 29 Dec D – Designation: D – 98 AMERICAN SOCIETY FOR TESTING PA Reprinted from the Annual Book of ASTM Standards. 1 Jun ASTM D Standard Recommended Practice for Preparation of Metal. Surfaces for Adhesive Bonding. ASTM D Standard Guide for.
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I am looking for any information on the removal and control of algae that d39333 in our Phosphoric Acid Anodizing tank. Prior to engineering your line you may wish to also think about production flow logistics as Adtm mentioned which are critical for best results, as well as meeting most aerospace specs. Standard guides for automotive and aerospace adhesives provide the proper guides for the classification, specification, preparation, and use of several adhesives on aluminum and metal surfaces.
Many factors, however, apply to shear modulus, tensile strength, and tensile modulus measured by small laboratory specimens in general. I cannot talk about certain Boeing processes on an Internet website for obvious reasons but would be glad to speak with you in person if you wish.
We would like to know if it is it normal for the solution to turn a yellow color after processing. I am trying out Phosphoric Acid anodizing for a new customer. Very straight forward and the cheapest good reference. Subscription pricing is determined by: If you are interested, one I might suggest is Surface Prep. 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.
I am skeptical-any truth to this? 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.
Standard Guides for Automotive and Aerospace Adhesives from ASTM
What are the surface phenomenon characteristics of PAA that make it so desirable for adhesion? Basically any of these processes would have to be tested for relative bond strength. I’m not saying phosphoric cannot do this, satm why open up a potential can of worms if you can achieve your goal and avoid some headaches.
If you see an affordable copy anywhere these days, grab it: I wouldn’t be too worried about it until the concentration climbs above what is allowed.
Our current system needs to be improved upon.
ASTM D3933 – 98(2017)
Phosphoric acid anodizing PAA is used to give aluminum a good tooth for adhesive bonding. If you are curious about Nadcap, the meeting results should be available on their website at the end of the month. Does the spent solution turn yellow with continued use?
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Sorry for the non-definitive answer. It is used as a surface preparation for bonding.
Phosphoric Acid Anodizing (PAA Process, primarily for adhesive bonding of aluminum)
This guide describes one method on how to properly prepare aluminum surfaces can be obtained. That is a management decision. A specific precaution is given in 5. Parts must be transferred to the clean room within two hours of removal from the PAA line and be primed within 72 hours. We currently have a small PAA outfit and would like to get it Nadcap approved. We previously had not experienced this yellow color change until we recently improved the electrical contacts and the mechanical contacts holding the parts to the racks.
You might find the article “An Alternative to Anodization: I am working on a project to find alternatives to Phosphoric Acid Anodizing to actually try to eliminate the phosphoric acid. This standard is also available to be included in Standards Subscriptions. Surely, since the original document was written, there have been advances in structural adhesive bonding.
The methods may be revised or supplemented, as necessary, to include methods based on proven performance. My customer requires this process as they need to go for another bonding process. Wegman published by Noyes publications.
To make more info available with less searching, we’ve combined together onto this page a number of previously separate threads about phosphoric acid anodizing.
I am trying to set up a small bench top operation. I have just quoted a large phosphoric anodize job.
I don’t think this is zstm, but I thought I should at least try to post the question. This discussion is limited to single-lap specimens and shear strength only for simplification. You may find something on the web under PAA or BAC, or you can do a literature search which will give you some data, or consider contacting Boeing’s commercial development office about licensing BAC