What is an adhesion test?

Colors and coatings are worth selling and use if they stick to the surfaces where they are applied. The adhesion test is usually the way the products are evaluated to ensure that they do what they have. There are several recognized testing methods.

The knife test is a simple method that can usually be done with a basic knife. The two cuts that make up "X" are usually made in a coating. At the peak of the section, the person performing the test will use the knife point and try to raise the coating.

This adhesion test establishes performance, how difficult it is to remove the coating and the amount of coating that is removed. The knife test can be complex because it is subjective. If the person performing the test is experienced, he / she can quickly determine if the coating is satisfactory. For a person with less experience, this test can prove problematic because the coating may have good cohesion but to be fragile.

The tape test can be an effective measurement of several coated layers. This adhesion test assesses the pressure needed to separatecoating from the surface or the base layer. There are two popular versions of the tape test.

First there is a test of X-Cut tape, which is often used on jobs. To perform this adhesion test, it is also necessary to reduce "X" to the surface. At the intersection of the cuts, the pressure sensitive tape is then applied and removes quickly. The coating quality is based on the amount that is removed from the section.

The second tape test is the cross hatch test. This adhesion test is usually performed in laboratories. It is usually limited to coatings that have less than 125 microns. "X" is replaced by a pattern of a cross hatch and the slices are usually carefully distributed and proper care is used to ensure parallel. The attestation area is then checked.

The scratching test is a method that is usually performed in the laboratory. This adhesion test is limited to color testingor coating adhesion on smooth flat surfaces. The test substances are usually applied to the measured thickness to numerous identical surfaces. Once the color or coating has dried, the surfaces are pushed under the stylus. Using a device called tester in adhesion with a balanced beam increases the weight until the coating is removed.

There are many other types and methods of adhesion testing. These include bending testing, pull-off testing and chemical resistance testing. Which test adhesion is used depends on factors, such as the type of color or coating, materials available for the test and experience of the person performing.