This article provides a comprehensive examination of the key factors affecting the service life of layer cages, emphasizing the performance characteristics of Q235 steel and comparing two prevalent corrosion protection methods—hot-dip galvanizing and aluminum-zinc alloy coatings—under humid conditions. It explains the underlying anti-corrosion mechanisms and offers practical maintenance guidelines such as regular inspection of fasteners and cleaning of drainage channels to extend equipment longevity. Illustrated with comparative tables and real-world case studies, the article aids poultry farmers in making informed decisions regarding equipment durability, operational risk reduction, and achieving sustainable investment returns.