What is a potential problem caused by amine blush?

Amine blush is a surface phenomenon that can occur during the curing process of epoxy coatings, particularly in environments with high humidity or when exposed to moisture. This blush is a waxy or greasy film that forms on the surface of the cured epoxy, and it can interfere with subsequent coatings or finishes.

The correct answer highlights poor adhesion as a potential problem associated with amine blush. When a surface has amine blush present, any additional coatings applied afterward may not adhere properly. The blush acts as a barrier, preventing a strong bond between the existing epoxy layer and the new coating. This can lead to issues such as peeling, flaking, or delamination, which significantly compromise the integrity and performance of the coating system.

In contrast, decreased surface tackiness, improved finish durability, and better gloss retention are not directly related to the presence of amine blush. In fact, the presence of blush typically raises concerns about the overall quality and durability of an applied coating, rather than enhancing its performance characteristics. Therefore, understanding the impact of amine blush on adhesion is crucial for effective coatings application and inspection processes.