Choosing the right materials for outdoor seating in areas prone to acid rain is crucial for durability and longevity. Acid rain can corrode and degrade many common materials, so selecting weather-resistant options is essential. Here are the best materials to consider:

1. Aluminum: Lightweight yet strong, aluminum is highly resistant to rust and corrosion. Powder-coated aluminum offers extra protection against acid rain.

2. Stainless Steel: Known for its durability, stainless steel resists rust and maintains its appearance even in harsh conditions.

3. Teak Wood: Naturally resistant to moisture and decay, teak is a premium choice for outdoor furniture. It ages gracefully without losing structural integrity.

4. Polyethylene (PE) Rattan: Synthetic rattan is waterproof, UV-resistant, and unaffected by acid rain, making it ideal for outdoor use.

5. Plastic Lumber: Made from recycled plastics, this material mimics wood but is impervious to moisture, rot, and acid rain damage.

For added protection, consider furniture with protective coatings or covers to extend its lifespan. By investing in these materials, you can enjoy stylish and long-lasting outdoor seating, even in acid rain-prone regions.