How do acid rains or pollutants chemically degrade PVC outdoor sculptures?
PVC (polyvinyl chloride) outdoor sculptures are durable but vulnerable to chemical degradation from acid rain and airborne pollutants. Acid rain, containing sulfuric and nitric acids, reacts with PVC's polymer chains, breaking them down and causing brittleness. Pollutants like sulfur dioxide and nitrogen oxides accelerate this process by forming corrosive compounds on the sculpture's surface. Over time, UV radiation from sunlight exacerbates the damage, leading to discoloration, cracking, and loss of structural integrity. Protective coatings and regular maintenance can mitigate these effects, but prolonged exposure inevitably compromises PVC sculptures. Understanding these chemical processes helps in preserving outdoor art in polluted environments.
