What is the effect of cathodic protection on the structure regarding its electronegativity?

The effect of cathodic protection on a structure's electronegativity primarily involves the reduction of metal ions through the application of an external electric current or by using sacrificial anodes. When cathodic protection is applied, the structure, typically a metal substrate, is made the cathode in an electrochemical cell, which influences its electrochemical behavior.

In this scenario, increasing electronegativity means that the metal surface gains electrons, effectively making it less positive or more negative in terms of its charge. This reduction in oxidation potential enhances the metallurgical integrity of the structure by significantly decreasing the likelihood of corrosion. The process involves maintaining a sufficient negative potential on the metal surface relative to the surrounding electrolyte, which helps to stabilize the metal in its reduced state.

This action does lead to an increase in the effective electronegativity of the structure during cathodic protection due to the reduction reactions that occur, making the metals less prone to oxidation and corrosion. Therefore, the concept aligns with the increase of electronegativity as free electrons are available on the surface, enhancing the overall resistance of the structure to chemical degradation.