In fact, the hot-dip galvanized steel grating has a long service life in a high-quality external environment. For example, in the dry field, its life can reach 70 to 80 years; in the general natural environment, its life is four. Fifty years; in an industrial environment with strong acidity and alkalinity, its life span is twenty or thirty years. It can be seen from the above examples that the external factors affecting the service life of the hot-dip galvanized steel grating are mainly the air humidity and the pH. As long as the environment of the hot-dip galvanized steel grid is not too humid; the pH is generally greater than PH6 and the alkalinity is less than PH12. Then, there is no problem in using hot-dip galvanized steel grating for forty or fifty years. As long as it exceeds this range, the corrosion resistance of the galvanized layer will drop rapidly.