Research on the influence characteristics of shallow buried anode ground bed on regional cathodic protection potential distribution
To explore the influence of anode bed characteristic parameters on regional cathodic protection potential,this paper first establishes a numerical model of the buried pipeline network in station B using COMSOL software.Then,this paper uses on-site data to verify the validity of the numerical model of the buried pipeline network.On this basis,the influence of the four characteristic parameters of anode bed on the distribution pattern of cathodic protection potential in buried pipeline networks is studied based on the control variable method.Four anode bed characteristic parameters include the number of auxiliary anodes,anode bed burial depth,auxiliary anode size,and anode burial form.Finally,the results show that:there is a negative correlation between the protection potential and the number of anodes.The protection potential of the near anode pipeline is more strongly affected by changes in the number of anodes,while the distribution of protection potential in the far anode pipeline is more uniform.When the number of anodes changes,the uniformity of the protection potential distribution in the dense area pipeline changes less;The protection potential first decreases and then increases with the increase of anode burial depth.The increase in anode burial depth can enhance the uniformity of the protection potential in the near anode pipeline,and this effect is more pronounced for pipelines in areas of the simple pipeline network structure;There is a negative correlation between the protection potential and the anode size.The variation pattern of protection potential distribution of buried pipelines under the change of anode size is basically consistent,and the uniformity of pipeline protection potential distribution changes little;The vertical burial of auxiliary anodes at the same burial depth is better than the horizontal burial in terms of protection potential.The vertical burial method has a wider range of protection potential distribution,while the horizontal burial method has better uniformity in protection potential distribution.
万方数据
维普
