1 Jun ASTM D Standard Recommended Practice for Preparation of Metal. Surfaces for Adhesive Bonding. ASTM D Standard Guide for. dure is described in ASTM D and involves the application of an anodizing potential to the metal while it is immersee in a dilute phosphoric acid bath. ASTM-D › Complete Document History Standard Guide for Preparation of Aluminum Surfaces for Structural Adhesives Bonding (Phosphoric Acid Anodizing).
|Published (Last):||21 October 2018|
|PDF File Size:||5.91 Mb|
|ePub File Size:||13.13 Mb|
|Price:||Free* [*Free Regsitration Required]|
The values given in parentheses are for information only. Ted is right that some adhesive bonding is performed using CAA as an alternative to PAA, but my understanding is astm d3933 lap shear test comparisons do not show the same results over time.
Surely, since the original document was written, there have been advances in structural adhesive bonding. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of astm d3933 limitations prior to use.
James’ recommendation was fromand even astm d3933 d393 “Light Metals Finishing Process Manual” was quite astm d3933 to find. Prior to engineering your line you may wish to also think about production flow logistics as Ray mentioned which are critical for best results, as well as meeting most aerospace specs. Hi, Krag and Jeff.
Phosphoric Acid Anodizing (PAA Process, primarily for adhesive bonding of aluminum)
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. I know of two methods: March 16, A. Others tell me that PAA requires primer application within 3 hours of anodizing and near clean room surroundings to avoid subsequent damage.
Also, Astm d3933 anodizers say you can laminate carbon skins directly to the converted surface without galvanic problems, but other coatings still require a glass barrier.
If you want a quick and dirty demonstration, make standard peel test specimens from candidate surface preps. I have just quoted a large phosphoric anodize job. Is there any astm d3933 about the advantages and problems associated with switching from phosphoric acid to sulfuric acid anodizing? Register or Log in astm d3933 direct access to additional content.
The main office, downtown, used to have one of the finest libraries going. The aluminum cathodes will be astm d3933 continually in phosphoric acid, shortening your bath life. Are you sure your anodizer isn’t talking about adhesion of astm d3933 primer to the PAA – this might have some merit – however, with PAA being only a fraction of 1 micrometer in thickness, I’m not sure it matters.
The only other anodize treatment called out for bonding prep work astm d3933 CAA which now brings Hex Chrome into your facility. Related Suppliers Searching for related suppliers Ray Handwerker – Bensalem, Pennsylvania.
One option was to eliminate the entire process and propose Ion Beam Assisted Deposition treatment to the components. qstm
astm d3933 Does the spent astm d3933 turn yellow with astm d3933 use? Broussard plating and metal finishing shop – Albuqerque, New Mexico A. If the anodizing tank is stainless steel, the astm d3933 itself can be the cathode. It uses sulfuric acid anodizing at many sites, and has a phosphoric acid anodizing operation in one building. My company is co-molding forged aluminum inserts into a carbon fibre component for the auto racing industry.
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 guide describes one method on how to properly prepare aluminum surfaces can be obtained. I run a small job shop and I’m just seeking to help r3933 customer out while he does some samples for adhesive bonding tests.
I have searched the web and cannot find much technical info.
This adhesive is required to maintain a tensile adhesion bond strength of not less than 3. Currently, Nadcap does not have a specific PAA spec, but one will be handed down soon after their quarterly meeting this month. We have developed a white residue after our parts are removed from the Phosphoric Acid anodizing Tank which is causing streaking.
The formation of reproducible, durable, adhesive bonds in structural assemblies requires great care in the selection of materials, the preparation of astm d3933 surfaces of the components to be bonded, the fit of the components, and the performance of the steps in the bonding process. You MAY be surprised by astm d3933 result. Please send contact information, I’ll forward drawings for an RFQ. Nonetheless, if the PAA astm d3933 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.
The values given in parentheses are for information only. So I am now looking for the BAC to get more information. We have tried lots with various tapes with Acrylic, Rubber and Silicone adhesives. We have been told that the sulfuric acid process is more temperature sensitive, and astm d3933 might have to astm d3933 a chiller and a heat exchanger to control the temperature.
Phosphoric acid anodizing per BAC5555 and ASTM D3933-98
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 astm d3933 contacting Boeing’s commercial development office about licensing BAC Usually the customer requires a certification before astm d3933 can be processed.
We have tinkered with PAA over the years typically applying adhesive primer after anodizing, but anodizing is a conversion coating. Specifically, little protruding oxide fingers rise right up out of the astm d3933 – I’m not sure that a smooth surface or a rough surface would have any difference – a clean and properly deoxidized surface astm d3933 behave identically given the same electrolyte, current density, etc.
Can you help me with a process for Phosphoric acid anodizing. This is auto racing, not aerospace, so we have some flexibility, but still cannot tolerate problems. I would suggest starting there with some of the engineering requirements asstm go to astm d3933 PAA spec. I need info like tank liners, cathode material, voltage and amp requirements, bath temp, etc.