Which property of a coating relates to its ability to adhere to a substrate?

The property of a coating that directly relates to its ability to adhere to a substrate is adhesion. Adhesion refers to the attraction between the coating material and the surface of the substrate it is applied to. This property is crucial in ensuring that the coating remains intact and provides effective protection or aesthetic enhancement over time, as poor adhesion can lead to issues such as peeling, flaking, or blistering.

When evaluating coatings, adhesion is critical for performance and longevity, as it influences how well the coating can withstand environmental factors, mechanical stresses, and other forces that could potentially separate it from the substrate. Strong adhesion ensures that the coating maintains its integrity and protective qualities throughout its intended service life.

Cohesive strength refers to the internal strength within the coating itself, not its bond with the substrate, while flexibility describes how well the coating can deform without cracking. Dielectric strength pertains to the electrical insulation properties of the coating material. These properties, although important in their respective contexts, do not specifically define the coating's ability to adhere to the surface upon which it is applied.