Mechanical Properties of a coating have a great impact on its performance. The coating on the substrate is often subjected to several types of mechanical or physical stresses during its service life caused by impact, harsh environments or changes in the size of the substrate. These stresses can cause film damage.
Therefore, for the coating, it is important to exhibit the required Mechanical Properties equilibrate, such as shock resistance, flexibility, Hardness, toughness, etc., to meet the service requirements of a particular application.
As we have already discussed the importance of impact resistance, flexibility and toughness are two other important Mechanical Properties of Coatings and paint formulations. Affects final performance and contributes to coat life. For example, in order to obtain good outdoor durability of coated wood substrates, the coating must have sufficient flexibility to compensate for changes in wood size due to changes in temperature or humidity.
Flexibility and toughness describe the ability of the coating to withstand different stresses.
Flexibility is the ability of a coating to bend or bend without breaking or Miscellaneous failure. It is the coating's resistance to damage when the substrate and coating deform.
Toughness, on the other hand, is the ability of a coating to withstand enormous strain in a short period of time without tearing, breaking or cracking.