Corrosion behavior of atmospheric environment and corrosion feature of materials in our Western area

The topography, geomorphy and climate in western area in our country are complex and multivariate. According to climatic factors and environmental conditions, there are approximately four types of typical atmospheric environment, namely acid rain environment, desert environment, plateau environment and tropical rainforest environment. The atmospheric corrosion degrees of all types of environment are different, as well as are the corrosion failure features of materials under different environment conditions. The acid rain atmospheric environment aggravates the corrosion failure of metals, protective coatings on metals and building materials, etc. Although the climate is dry and there is little rain in the desert atmospheric environment, owning to the high salt content in air sediment, the corrosion failure of copper, zinc, aluminum, stainless steel and metal coatings in Takelamagan area located in Talimu basin is severer than that in eastern moist hot or semi - moist hot city environment. Under plateau environment condition, the significant feature is that macromolecular materials will fail rapidly. The feature of tropical rainforest atmospheric environment is mainly that optical instrument, leather, fabric and timber will be severely moulded.