Park chairs are designed to withstand harsh weather conditions, including acid rain, which can cause corrosion and deterioration over time. Manufacturers use durable materials such as aluminum, stainless steel, or specially treated wood to enhance resistance. Many chairs feature protective coatings like powder coating or galvanization, which create a barrier against acidic moisture. Additionally, regular maintenance, such as cleaning and reapplying sealants, helps prolong their lifespan. By combining robust materials and advanced treatments, park chairs remain functional and aesthetically pleasing despite exposure to acid rain.