Recommend using galvanized aluminum-zinc coated steel sheets with sufficient lifespan and strong corrosion resistance for color steel factory buildings. As the ventilation equipment for color steel factory buildings, the ventilation air tower can match the lifespan of the color steel factory, making this approach economically rational. With a one-time installation of the equipment, the factory can enjoy lifelong benefits. By observing the above data, we can theoretically speculate that the lifespan of galvanized aluminum-zinc steel sheets is 2-6 times that of hot-dip galvanized steel sheets.

Recommended for steel factory buildings, use galvanized aluminum zinc coated steel sheets with long service life and strong corrosion resistance. As the ventilation equipment for the steel factory building, the ventilation tower can match the lifespan of the steel factory building, making this approach economically rational. A one-time installation for the factory building brings lifelong benefits.

By observing the data above, we can theoretically speculate that the lifespan of aluminum-zinc coated steel sheets is 2 to 6 times that of hot-dipped galvanized steel sheets. Whether it is exactly 2 times or 6 times depends on the specific environment.

A data release requires precise and complex calculations, incorporating various exponential and power functions, followed by manual adjustments to arrive at the final figure.

Moreover, building envelope materials cannot completely isolate steel from air, and various environments must be considered. Therefore, when calculating, a compromise between industrial/sea environments and rural environments should be taken into account, as a lifespan of 50-60 years is entirely feasible.