Life is about the airport chair?

First, we need to know the seating, airport chair and so on is to use iron, steel, stainless steel, aluminum alloy material, such as manufacturing, and use the place is the place that abortion is larger, and oxidation with air. So the service life of partial businessman appeared online in more than 10 years, 20 years, this number is controversial. Our seating (service life Must not clean with clean disinfectant containing chemicals) (1) the service life of the ordinary seating: 3 - 5 years (2) the service life of the PU seating: 5 - Ten years