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Why Bonding Strength Matters for Polymer Coatings (and NOT for EonCoat)

Polymer Coating Bonding Process

When choosing a traditional polymer corrosion-resistance coating, it’s important to consider pull-off strength, or how much force is required to separate the polymer from the substrate. This is important because the source of a polymer’s corrosion resistance is how tightly it can bond with the substrate (which is also why extensive preparation is required before applying a polymer coating). If one section of a polymer coating is pulled off, the entire substrate could be at risk.

EonCoat Bonding Process

EonCoat is a ceramic and works a bit differently than a polymer corrosion-resistance coating. When applied, EonCoat creates a 20 micron alloyed layer chemically linking EonCoat to the substrate. This alloyed layer that provides the corrosion proof surface cannot come off in a typical pull off test because it has become part of the substrate. The ceramic layer of EonCoat which protects the alloyed layer will separate mid coating in a pull off test, but this layer is not the primary corrosion barrier. So adhesion tests are not the measure of corrosion protection that they are with polymer coatings.

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