Читать книгу Corrosion Policy Decision Making - Группа авторов - Страница 30

Resistance to atmospheric factors, such as ultraviolet rays, is the most important role of the topcoat layer. Special properties such as abrasion, scratches, resistance to the growth of microbial agents, etc. are also dependent on this layer. The top layer should have good adhesion to the middle layer and have good decorative properties.

One of the causes of paint system degradation is the incomplete use or displacement of layers. In addition, in local repairs and touch‐up paints, it is often observed that a new primer is applied on the middle layers or the old paint surface. This mistake can lead to premature damage to the paint. Removing the old topcoat layer, neglecting the new primer, and starting the implementation paint system from the new intermediate layer and then the new topcoat is a more proper method.

It is essential that paint users and paint inspectors heed the comprehensive scientific information of paint types and their potential capabilities on corrosion prevention.