Key Technology of Weather Resistant Steel Used in Power Grid in Guizhou Atmospheric Environment

Atmospheric corrosion has a significant impact on the safe operation of power transmission and transformation equipment in power grids.At present，the atmospheric corrosion resistance and anti-corrosion technology of steel widely used in the field of power transmission and transformation equipment cannot meet power grid construction and long service life requirements.In this paper，current situation of atmospheric corrosion of power transmission and transformation equipment was described first，then the influence of environmental parameters such as atmospheric composition，atmospheric relative humidity，temperature，chemical composition and microstructure of steel on the corrosion rate and corrosion mechanism of power grid equipment were pointed out.Furthermore，combined with the atmospheric environment conditions in Guizhou province，the key problems to be solved in the application of weathering steel in Guizhou power grid were analyzed.Finally，it was proposed that through on-site exposure test，accelerated test and development of on-line monitoring technology，not only massive corrosion data could be collected，corrosion rating could be achieved and a complete atmospheric corrosion grade map could be established，but also the corrosion mechanism of weathering steel in a specific atmospheric environment could be obtained by combining big data processing and machine learning methods to provide technical support for the safe operation of weathering steel in power grid equipment instead of ordinary carbon steel and related equipment.