During the application process of the coating, its paint film quality is constantly attenuated, which is a normal aging process. (Related instruments: aging test box)
Coating defects occur when a coating system develops defects much faster than the normally expected service life, or if the steel structure rusts prematurely. There are many reasons for coating defects, which may be one or a combination of many factors.
① Improper or wrong formula;
② Improper or wrong design of the coating supporting system,
③ Poor surface treatment;
④ Poor construction quality;
⑤ The environment in which the coating is used exceeds its performance limit;
⑥The role of external machinery, impact force and mechanical wear, etc.