Choosing an adhesive for a metal application is not always an easy task. Although there are many adhesives that will initially bond two metals together, the performance as a metal bonding adhesive can vary widely from situation to situation.
Material Compatibility
The first step is identifying what surfaces are being joined. A metal bonding adhesive designed for metal-to-metal contact may not perform the same when applied to plastic or coated surfaces. Some metals, such as galvanised or powder coated finishes, can be more challenging and may require additional preparation.
Surface Preparation and Conditions
Surface preparation is important for the adhesive properties of the joint. All surfaces need to be free from contamination, including moisture, dirt, dust, oils, etc. Primers and surface treatments are also often required. Factors such as temperature and humidity should be considered to allow time for the sealant to cure and to achieve the optimum bond strength.
For example, guidance on adhesive bonding and surface preparation explains how proper preparation can significantly improve performance.
Performance Features
When planning a project, it is important to consider the requirements of the metal bonding adhesive. These may be flexibility, strength, resistance to chemicals etc. Once the requirements of the project have been listed, adhesives can be compared.
When comparing available solutions, it can be useful to review examples such as www.ct1.com/product-applications/metal-to-metal-adhesive to understand typical uses.
There are many variables when choosing an adhesive for an application. In the end, it’s all about the relationship between the materials to be bonded and the type of bond needed.