Reasons for choosing cathodic protection

What conditions are needed for the cathode pipeline and how can the pipeline corrosion rate be reduced?

As important metal pipelines transporting oil and natural gas, they need a long service life. In order to ensure their service life, cathodic protection is usually applied to them. But not all pipes are suitable for cathodic protection, so do you know what conditions are required for cathodic protection, and how can we reduce the corrosion rate of pipes? The following jiaozuo Ladbrokes light alloy will give you a detailed analysis of the above matters, if you have any doubts, we welcome your call to consult!

Knowledge points

1: The construction conditions of cathodic protection

In general, cathodic protection should be applied when the pipe is buried, so that the buried metal pipe can be protected from the source. So do you know what conditions need to be met to apply cathodic protection piping? First, ensure that the pipe has longitudinal continuous conductivity; Secondly, the pipe also needs to have enough resistance pipe cover; Finally, piping and other low resistance grounding devices need to be insulated.

Knowledge points

2: How can cathodic protection reduce the corrosion rate of pipelines

Why do pipes corrode? The surface of the buried pipeline will have an anode area and a cathode area due to the underground impurities, so the current in the anode area will flow into the surrounding environment by the pipeline, and then the electrolyte will flow to the surface of the pipeline, which will reduce the corrosion rate of the area. The task of the magnesium anode in cathodic protection is to force the direct current to flow to the surface of the pipeline, so that the potential of the pipeline is shifted to the negative direction, so as to reduce the metal corrosion rate.