Performance indicators of coatings

Adhesion: It reflects the firmness of the bond between the coating and the substrate material. The better the adhesion, the less likely the coating is to detach from the substrate. Testing methods such as scratch test and pull-out test are used to detect this.

Hardness: It reflects the ability of a coating to resist external forces such as indentation and scratches. Pencil hardness testing is commonly used to measure the hardness of coatings, and coatings with higher hardness often perform better in terms of wear resistance.

Corrosion resistance: Measuring the performance of a coating in protecting the substrate from chemical corrosion, it can be evaluated through methods such as salt spray testing and immersion testing. For example, coatings used in marine environments have high requirements for corrosion resistance.

Wear resistance: It is related to the ability of the coating to withstand friction and wear. For surface coatings of parts that are frequently in contact and friction, wear resistance is an important performance consideration factor.

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