Analysis of anchor rod failure in a guyed transmission tower: Influence of microstructures and corrosion mechanisms

The mechanical rupture of buried structural components, such as the anchor rods of guyed transmission towers, poses a significant problem in electrical and mechanical engineering. In this work, joint evaluation of anchor rods microstructures, corrosion products, and environmental analysis of corroded anchor rods in a guyed tower was conducted. Microstructural metal analysis, electron microscopy scanning, and backscattered electron diffraction (type FEG-SEM/EBSD) were used to determine the disorientation of the crystalline structure (misorientation angle <5 degrees) and elongated grains with sizes around 2-10 mu m. Predominant crystallographic planes (001) and (1 1 1) were found to be more susceptible to corrosion than (101). Researchers also observed accumulations of chloride ions in concentrations of up to 10.2% in corrosion products, and in the soil surrounding the anchor rod, chloride and sulfate ions were found in concentrations of up to 5.15% and 2.33%, respectively.

Automated summary

This study conducted a comprehensive analysis of the microstructures, corrosion products, and environment of corroded anchor rods in guyed towers, identifying key factors related to corrosion.