What Makes The Anaerobic Adhesive Curing Mechanism Unique?

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The family of high temperature anaerobic adhesives are normally employed in applications such as threadlocking; retaining rigid, cylindrical assemblies; and sealing in between flanges. They’re commonly known as machinery adhesives or mechanical adhesives.

In many applications a liquid is employed. The viscosity will vary between the varying types of anaerobic glues, some will be much more similar to a gel that can adhere to the metal and a few will be so thin they will wick or seep into restricted areas.

What makes these types of adhesives distinctive is their capacity to cure. In the absence of air, and in the existence of metal ions the curing process begins. Strong polymer chains are shaped that develop a tenacious bond in between metals. As opposed to conventional glues that cure through mostly evaporation through the air, the air impedes anaerobic adhesives.

Even though anaerobic applications differ broadly, in many instances the adhesive offers higher shear strength and exhibits very little flexing or peel forces. When anaerobic products are employed to lock threaded assemblies with each other, they prevent loosening and corrosion in the assembly. For example, when an anaerobic adhesive is sealed in between a nut and a bolt on a threaded assembly, it rapidly cures to form a hard, crosslinked plastic with robust adhesion to a lot of metals.

As the liquid threadlocker cures, it finds its way into each tiny imperfection within the threads. The adhesive fully fills the microscopic gaps in between interfacing threads to lock and seal the assemblies, preventing lateral movement and corrosion that may result from moisture, gases, and fluids.

The sealing nature of anaerobic glue makes it perfect for use as formed-in-place gaskets that provide a seal in between flange faces. Due to the fact they let you create joints with a line-to-line fit in between metal flanges, they eliminate the need for tightly controlled flange surface finishes and the difficulties associated with compression gaskets, like compression set, bolt relaxation, and loosening.

For rigid, cylindrical assemblies, like joining a bushing to a shaft, anaerobic adhesives have replaced press fits and shrink fits in many assemblies. Press and shrink fits generally call for tight manufacturing tolerances and costly surface finish requirements. Because they often entail cumbersome heating and cooling of components before assembly, the assembly can actually be distorted.

In manufacturing operations in which application of a liquid threadlocker is not desirable, adhesives manufacturers have created pre-applied dry threadlockers that cure once the threaded device is assembled.

Through adhesive technologies new glues are being created and conventional types being improved, but maybe this sort of adhesive, anaerobic, will always possess the most interesting curing mechanism.

For more information about Adhesive System’s structural adhesives or any other adhesives please contact us at 877.740.1250 x20. You can also send us an email at asisupport@instantca.com. If you don’t find exactly what you’re looking for, tell us about your application and we’ll help you find something that will work, or customize something specific for you.

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