What is the importance of surface preparation before applying coatings or repairs?

Surface preparation is crucial in the process of applying coatings or making repairs because it directly impacts the adhesion of these materials to the underlying surface. Good adhesion is essential for the long-term durability and effectiveness of any coating or repair. When a surface is properly prepared, it is cleaned of contaminants such as dirt, oils, and oxidation, and any imperfections are addressed, allowing the new material to bond effectively to the substrate. This minimizes the risk of peeling, flaking, or delamination, which could lead to structural failures or deterioration over time.

Additionally, surface preparation can involve mechanical methods to create a profile on the surface that further enhances bonding. This attention to proper surface treatment ultimately contributes to the longevity and reliability of both the repairs and coatings applied. Achieving good adhesion is especially important in aircraft repairs, where safety is paramount, and any failure could have serious consequences.