The article describes the destruction of automotive paint coatings under the influence of: aggressive media, heat, ultraviolet (UV) radiation, and erosive factors. Aggressive media absorbed by paint coatings cause swelling, cracking, and corrosive wear. The effect of heat results in cracking of the coatings, as well as a loss of their adhesion to the substrate. The influence of UV radiation stimulates the formation of silver cracks on the surface of the coatings and increases surface roughness, which in effect causes a loss of gloss and a change in the color of the coatings. The impact of erosive particles leads to: loss of coating fragments, abrasion (scratching), or deformation of the coating and substrate at the points of contact between the particles and the coating. The greatest reduction in the decorative quality of coatings is caused by the influence of UV radiation.Automotive paint coatings primarily undergo wear as a result of: the development of sub-coating corrosion, erosion, and the loss of decorative properties, especially under the influence of ultraviolet (UV) radiation [3].
The development of corrosion on a metal substrate contributes to the formation of corrosion products, which cause the coating to detach from the substrate and even puncture it. (…)
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Source: Logistyka Magazine
Types of destruction of automotive paint coatings – PDF file for download