Phenomenon: after the paint film is placed outdoors for a period of time, there is a discoloration and powdered layer on the film surface, which is adhered to the hand when touched by hand.
Phenomenon: due to poor adhesion and combination between paint layers, abnormal phenomena such as paint film falling off, peeling, bulging and peeling will occur.
Phenomenon: cracks with different depth and size appear on the surface of the paint film. If the lower surface can be seen from the crack, it is called & quot; Cracking & quot;; If the paint film shows small cracks with turtle back pattern, it is called & quot; Crack & quot;.
Phenomenon: there is an obvious gap or matte between the coating surface and the standard gloss of the paint itself, and the expected gloss cannot be obtained
Phenomenon: undercutting refers to the phenomenon that the solvent in the upper coating softens and swells the bottom film, resulting in poor adhesion of the bottom film, resulting in peeling and uncovering.
Phenomenon: also known as over range spraying, it refers to that part of the coating does not reach the surface of the coated object, has become paint powder, and then attached to the wet coating to produce particles, which are covered by the later coating, or cause rough surface.
Phenomenon: the coating surface is not smooth, showing a concave convex state, such as orange peel
Phenomenon: oil separation and shrinkage are local shrinkage on the surface of the coating film, as if water is sprinkled on the wax paper, and spots show the flower face like phenomenon of the bottom layer, also known as fish eye, laughter, shrinkage, etc.
Phenomenon: after the paint film is dry, there are protrusions and round bubbles of different sizes, also known as bubbles. Blistering occurs between the coated surface and the paint film, or between two layers of paint film.
Phenomenon: the paint flows on the coated surface or groove. The thickness of the paint film is uneven. If it is serious, it is like the paint curtain sagging, and if it is light, it is like a string of tears.
Phenomenon: the film contains water or other liquids, the color of the film is lighter and white than the original, and the film is white mist.
Phenomenon: after the film is dry, some or all of the coated surface has bonding marks
Phenomenon: after a period of time, the film is still not dry and does not harden
Phenomenon: dust, flocs, foreign matters, etc. are attached to the surface of the coating film; The coating is painted on the surface of the object. There are many particles in the coating film. The particles are like prickly heat, and the feel is rough and not smooth.
The coating is formed after coating construction. The different problems of the coating after a period of service are called coating defects. The attenuation of coating film quality during use is a normal aging process; If the coating system is much faster than usually expected