Adhesion Tests

Adhesion tests are conducted to measure the level of attachment between a dry paint film (coating) and its underlying surface. A coating with good adhesion will effectively protect the surface it has been applied to for the intended duration and possibly even longer. Conversely, poor adhesion can lead to coating failure, premature corrosion, contamination of surfaces or contents (such as tanks or vessels), equipment shutdown, and an unsightly appearance.

Paint chemists have formulated coatings that can provide a predicted service life, but only when applied to properly prepared substrates. However, the preparation and application of coatings in an industrial setting differ significantly from those done on steel panels in a controlled lab environment.

When preparing and applying coatings in field conditions, there are numerous factors to consider. Even minute or invisible contaminants can cause adhesion issues within a short period, ranging from days to weeks.

Several tests are used to evaluate coating adhesion, including the X-Cut, Cross-Cut, and Pull-Off Type tests.

Coating Radar App provides reviews of these destructive tests in both field and laboratory conditions and will discuss the relevant international standards utilised in the coatings industry and provide guidance on evaluating and reporting the test results.