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Which fiberglass or stainless steel is more durable depends entirely on the usage scenario and corrosive environment. There is no absolute advantage or disadvantage between the two. The core depends on the application conditions.: 1. Highly corrosive and harsh environment: FRP is more durable. In strong corrosion scenarios such as acid and alkali, high salt spray, and coastal chemical industry, the corrosion resistance of FRP is clearly better than that of stainless steel.: FRP itself is a resin composite material, which is naturally non-rusting, and its resistance to acid, alkali and salt spray corrosion is much stronger than that of ordinary stainless steel. It will not rust even if it is exposed to industrial sewage and acidic gases for a long time. ； Taking the anti-corrosion of sewage pools as an example, high-quality fiberglass linings can have a service life of more than 10 years under standardized construction. Under the same working conditions, ordinary stainless steel will develop rust spots and pitting corrosion in only 3-5 years. ； But need to pay attention: Ordinary FRP will suffer surface aging and cracking when exposed to the sun for a long time. If used in permanent outdoor scenes, additional anti-UV coating protection is required. 2. Outdoor permanent landmark/high load scene: Stainless steel is more durable. If it is a scene that requires long-term use and high structural strength requirements, stainless steel is far more durable than fiberglass.: 304/316 stainless steel is extremely resistant to aging, impact, and wind pressure. It can be used outdoors for decades. It is suitable for permanent landmark structures and will not suffer from the common surface cracking and fading problems of fiberglass. ； Stainless steel material has sufficient rigidity and is not easily damaged in densely populated public scenes and large-sized structures. It is safer, can be recycled and reused, and has stronger environmental protection properties. ； Even in coastal high salt spray environments, 316 stainless steel can maintain structural stability for a long time without corrosion and degradation of the fiberglass resin layer.