Selecting the best metal-to-metal adhesive for your project can be a challenge. In short, there is no number one, go-to adhesive suitable for every metal bonding job. Instead, you need to concentrate on choosing the right adhesive for your metal, based on its many different properties. However, one property carries more weight than the others.
How Surfaces Affect Metal-to-Metal Bonding
Using a metal bonding adhesive in an indoor static environment is one thing, but once you head outside and start thinking about real-world applications, you need to consider surfaces. Most metals have a moderately high surface energy, so when adhesives wet the metal’s surface, a superior bond strength is created. However, this changes when a coating has been applied, and most metals we work with will have some kind of painted or powder-coated surface.
On a painted surface, any adhesive applied is interacting with …