Stresses That Can Impact Typical Anti-Corrosive Coatings

Stresses That Can Impact Typical Anti-Corrosive Coatings

A typical anti-corrosive coating is subject to various stressors that cause it to deteriorate or become ineffective over time, especially in challenging environments. Understanding these stressors is essential to selecting the coating that will best suit the needs of your industry and protect your valuable assets. Read on to learn what conditions stress many kinds of coatings — and why choosing EonCoat can free you of these worries.

Common Coating Stressors

Internal Stressors

Many paints or coatings are applied to a surface in liquid form. As the coating dries, the liquid evaporates and leaves behind the solids that were suspended in the liquid. The liquid form allows the coating to conform and adhere to surfaces of almost any shape, but the shift from a liquid state to a solid during the drying process creates stress for the coating.

As a liquid coating dries, its volume naturally decreases, so the coating shrinks. The early stages of this cause little stress to the coating, as it is still pliable enough to be mostly unaffected by the shrinkage. However, once the coating has dried completely, internal stresses can start to occur. Coatings with a high amount of solid particles must have a binder that remains pliable as the ratio of solids to liquid-binding material increases. When the liquid evaporates and the coating hardens, the reduction in the coating’s volume creates internal tension, which can leave it vulnerable to cracking, bubbling, or peeling. Areas where the coating is thicker experience more stress than those where the coat is thinner. This process can happen quickly in cases of coating failure, but usually occurs over a period of years.

External Stressors

Internal stressors are exacerbated by external ones, which include movement allowed by the flexibility of the coated surface, vibration, external temperature changes, and abrasion.

Abrasion is one of the most common and significant sources of external stress experienced by coatings used on many industrial, domestic, and technological assets. It is the result of friction from scuffing, scratching, corrosion, or other contact that wears away a coating, such as consistent exposure to moving parts. The level of abrasion is affected by the speed, concentration, and mass of the particles in contact with it. It can be caused intentionally, or can happen on its own due to exposure to the elements or wear and tear from regular use.

Abrasion-Resistant Ceramic Coatings

Abrasion is an inherent part of many environments, but using a coating that is specifically designed to be abrasion-resistant provides you with the ultimate defense. A coating such as EonCoat provides a hard surface that resists scratching. It is not applied in a liquid form, which eliminates the stresses caused when the liquid dries. EonCoat is not affected by the same types of stressors as other coatings because it chemically bonds with the material it is applied to. This makes it the most effective choice for surfaces in corrosive and abrasive environments.

This is backed by testing data. This testing is often referred to as a “Taber wear test.” During testing with an abrasive wheel rotating against a coated panel, the number of cycles it took to create .001″ of wear for most polymer paints was about 75 cycles. An ordinary epoxy, meanwhile, took about 125-250 cycles. It took more than 1,200 cycles to cause the same amount of wear to EonCoat’s ceramic coating.

If you want to protect your assets from corrosion and abrasion, contact the team at EonCoat today.