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.
| Author: | Mihn Kimi |
| Country: | Hungary |
| Language: | English (Spanish) |
| Genre: | Art |
| Published (Last): | 13 October 2017 |
| Pages: | 343 |
| PDF File Size: | 6.20 Mb |
| ePub File Size: | 3.91 Mb |
| ISBN: | 975-4-92528-833-5 |
| Downloads: | 51356 |
| Price: | Free* [*Free Regsitration Required] |
| Uploader: | Zusar |
If you want a quick and dirty demonstration, make standard peel test specimens from candidate surface preps. Basically there are some particular surface phenomenon characteristics with PAA which are not acquired elsewhere other than possibly FPL etches, and that could be arguable. This standard is also available to be included in Standards Subscriptions.
Asrm, PAA anodizers say you can laminate carbon skins directly to the converted surface without galvanic problems, but other coatings still require a glass barrier. Currently, Nadcap does not have a specific PAA spec, but one will be handed down asm after their quarterly meeting this month.
This aastm describes one method on how to properly prepare aluminum surfaces can be obtained. Equally important, the data had to be easily verifiable, and his proven methodology had to be universally accepted for verifying the required adhesive bonding properties.
The values given in parentheses are for information only. There is an engineering document you need to be qualified to for Boeing work. The next best process to PAA would be any method of etching the aluminum surface to roughen the profile. Last previous edition D— Can you help me with a process for Phosphoric acid anodizing. Need a source for PAA etch to D [link by ed. Add d3933 Alert PDF.
I was hoping someone could suggest a filtration technique for the acid tanks to satm chloride and fluoride levels down to acceptable levels 35 ppm for chloride, 75 ppm for fluoride. After priming, parts can be stored before bonding. Specifically, little protruding oxide fingers rise right up out of the aluminum – I’m not asttm that a smooth surface or a rough surface would have any difference – a clean and properly deoxidized surface will behave identically given the same electrolyte, current density, etc.
Do you know where I d39933 get the info? Minford from Abe Books or info on Amazon A. 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.
Standard Guides for Automotive and Aerospace Adhesives from ASTM
I am trying aatm set up a small bench top operation. Another would be Handbook of Adhesives edited by Skeist. There is very little information on this specialized process. We previously had not experienced this yellow color change until we recently improved the aatm contacts and the mechanical contacts holding the parts to the racks. Solutions used in this process are corrosive and toxic. Parts should be held in a limited contamination area prior to priming and should not be handled 5.
Ted is right that some adhesive bonding is performed using CAA as an alternative to PAA, but my understanding is the lap shear test comparisons do not show the same results over time. Joel, there are some very specific requirements concerning bonding using PAA. This standard is not included in any packages.
We would like to know if 3d933 is it normal for the solution to turn a yellow color after processing. Improper surface preparation can produce seemingly acceptable bonds that can degrade rapidly with time. Astmm 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.
Phosphoric Acid Anodizing (PAA Process, primarily for adhesive bonding of aluminum)
Minford from Abe Books or info on Amazon. The discoloration could be related to some of the alloying materials dissolved in solution. The spec can be obtained from Boeing commercial division or from some specification clearing houses like aerospheres. My customer requires this process as they need to go for another bonding process. I am skeptical-any truth to this? Chromic acid and other anodizing methods, while good for corrosion protection, seldom proved in environmental stress tests, e.
I am looking for technical information on PAA phosphoric acid anodizing.
Phosphoric acid anodizing per BAC5555 and ASTM D3933-98
It is then sealed using DI water in d3393 series of two dip tanks. Sorry for the non-definitive answer. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of aatm limitations prior to use. We currently have a small PAA outfit and would like to get it Nadcap approved. However, it is most desirable to prime parts as soon as possible to minimize the possibility of inadvertent contamination.
With aluminum playing a larger role in vehicle production, surface preparation of that naturally aging substrate is critical to achieving bonding success. Standards Subsctiption may be the perfect solution. Very straight forward and the cheapest good reference.
Standard Guides for Automotive and Aerospace Adhesives from ASTM
As for my colleague, he studied the standards with the tenacity of an electrical d39333. James’ recommendation was fromand even then the “Light Metals Finishing Process Manual” was quite hard to find.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Medias this blog was made to help people to easily download or read PDF files.