Analysis and research on flow-accelerated corrosion at elbow of carbon steel pipeline
The elbow is one of the components that are prone to failure in chemical and power pipelines.This study investigates the distribution of corrosion current density in carbon steel elbow sections under different inlet velocities(1 m/s,2 m/s,and 3 m/s)through electrochemical measurements.Based on steady-state mass transfer electrochemical corrosion combined with galvanic corrosion theory,a prediction model for accelerated corrosion in the flow of carbon steel elbow sections is established.The experimental results show that the maximum corrosion current density of carbon steel elbow sections occurs on the outer side of the elbow,indicating that the curved part on the outer side of the elbow is more prone to perforation.In addition,the distribution of galvanic corrosion density in elbow sections is consistent with the experimental results and statistical data from power plants,validating the accuracy of the model.The research findings can provide effective basis for the design optimization and operation monitoring of industrial transport pipelines in the power and chemical industries.
flow-accelerated corrosionelbowgalvanic corrosionprediction modelcarbon steelcorrosion current density
万方数据
维普
