What causes the coating to become brittle, delaminate, and peel off?

The reasons for coating cracking, delamination, and peeling may include the following: 1. **Improper surface preparation of the substrate**: If the surface of the external wall of the pressure vessel is not cleaned and prepared properly, with residues such as oil or rust present or if it is not fully dried, this will affect the adhesion between the paint layer and the substrate. 2. **Painting environment issues**: Inappropriate environmental temperature and humidity during painting can also prevent the coating from curing properly, thereby affecting the performance of the paint layer. 3. **Quality issues with the paint itself**: If the proportions of the components in the paint are not correct, or if it is stored under poor conditions (such as excessive heat or cold), this can lead to a decline in the paint’s performance. 4. **Coating thickness and drying time**: An overly thick coating, or improper control of the drying time for the inner and outer layers, can cause the surface layer to dry before the underlying layer, leading to uneven surface stress and subsequent cracking or delamination. 5. **Compatibility between coating and substrate**: Poor compatibility between the primer and topcoat used, or issues with the interaction between the paint and the substrate, can also lead to poor adhesion and result in the coating peeling off. It is recommended to reevaluate the painting process, check the quality of the paint, and ensure that the environmental conditions are suitable and that the surface preparation of the substrate meets the required standards. .

Thick coating, incompatible base paint? I don’t understand; I’m also looking for an answer

Anti-corrosion and insulation construction is very important; there’s **even more to it**.