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This post was last edited by Wang Wei2 on 2024-11-10 at 10:11. Usage environment and conditions of heat rods: 1. Usage environment: The Qinghai-Tibet Plateau has an average altitude of over 4,000 meters, covers a large area, and exhibits more pronounced characteristics of a plateau climate. The main characteristics of the plateau climate are: ① Due to the thin atmosphere on the plateau and low levels of water vapor and other substances, the radiation intensity is high, with an increased level of ultraviolet radiation. The annual radiation in most areas of the Tibetan Plateau is about twice that of the eastern part of China at the same latitude. At the same time, the effective radiation on the plateau is high, so the radiation deficit is small. ②Diurnal temperature variations are significant on the plateau. The diurnal temperature variation on the Qinghai-Tibet Plateau is about 1 to 2 times higher than that in eastern China. ③Precipitation in the highland interior, west, and north is less than 100 millimeters. ④Due to the differences in annual surface temperature variations on the Tibetan Plateau compared to those in the free atmosphere at the same altitude elsewhere, the direction of the temperature gradient differs between winter and summer; as a result, a plateau monsoon phenomenon occurs, which tends to lead to severe sandstorms. 2. Usage conditions: Due to the deteriorating operating environment of the heat rod, as shown in the diagram, the service life of the anti-corrosion coating on the ground portion fails to meet the design requirement of over 10 years. Currently, the metal surface protection coatings for the ground portion of heat rods consist of a metal protective layer (hot-dip galvanizing) and conventional paint coatings; after 3 to 5 years of use, these protective layers become damaged and lose their effectiveness. Take a look at what better ways there are for protection.