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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Recently one of my long-time colleagues with an electrical engineering background retired. My colleague, being the inventive sort, had developed a multipurpose product with potential use in transportation OEM applications.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

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. He had to define many material characteristics and ultimately prove that the product would be functional, durable and corrosion-resistant in the c3933 transportation environment, which was no easy feat.

This seemingly daunting task did not faze him, however, as he had ample time to devote to it. His work was proceeding smoothly — that is — until he was faced with proving that the adhesives he planned to use would be compatible with multiple materials and substrates.

Of course, that was only the beginning: Which suppliers would speak to him, he mused — and which questions when properly answered would facilitate material compatibility?


Standard Guides for Automotive and Aerospace Adhesives from ASTM

Further, zstm could he verify supplier data found on a typical technical data sheet TDS in a manner that r3933 be universally accepted as adhering no pun intended to good scientific and documentation principles without necessarily running every adhesives test known to the automotive world? After all, he had unlimited time, but not unlimited money. He sought a practical methodology that would yield the necessary data.

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.

Even well-established manufacturers are seeking cost-effective yet scientifically rigorous testing protocols in ! It even provides a means for specifying these materials through the ASTM standards that it references. Reviewing this guide brings perspective not only to the product under development, but also any necessary testing.

In either case, these guides can be leveraged as a springboard to a productive discussion awtm an adhesives supplier.

Phosphoric acid anodizing per BAC5555 and ASTM D3933-98

Likewise, ASTM provides myriad testing protocols for adhesive bonding. These methods include, of course, the typical lap-shear D and D and peel tests D Some applications require more complex information related to aging, durability, flexural strength of laminated assemblies and impact strength.

Other considerations include temperature and humidity effects on joint strength, moisture inhibitors, and retaining joint integrity in cyclic environmental conditions. Conveniently, all these tests and more are represented in Subcommittee D With aluminum playing a larger role in vehicle production, surface preparation of that naturally aging substrate is critical to achieving bonding success.


To that end, ASTM D Standard Guide for Preparation of Aluminum Surfaces for Structural Adhesives Bondingreleased in and updated inis critical for structural adhesives bonding since aluminum surfaces degrade over time. This test has assisted in controlling surface preparation operations for a wide variety of aluminum alloys that are ultimately adhesive bonded. It is recommended for screening durability of surface preparation-primer-adhesive ashm through the analysis of crack growth and mode and locus of joint failure.

This test method is also useful for providing information on the durability of other metals and plastics, provided thickness and rigidity are considered. The Working Properties Subcommittee D There is even a standard related d39333 adhesive odor: This standard is useful in determining astj of an adhesive in applications where the odor level associated with end use is critical, such as vehicle interiors.

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

These standards reflect many routine and practical applications. Rather than depending upon historical precedent within individual companies, ASTM standards can codify the results, rendering them universally accepted. As for my colleague, he studied the standards with the tenacity of an electrical engineer.

Consequently, his adhesive compatibility program was a success. Cynthia Gosselin guest blogger, ChemQuest.