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Based on some articles that have been published in Materials Performance (MP) and the NACE Courses 9 and Standards for Cathodic Protection (CP) practitioners, this author has concluded that present day CP practitioners, do not have an adequate understanding of some basic scientific principles.
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Corrosion of steel reinforcement is one of the most common forms of deterioration of reinforced concrete structures, having a large impact on both their life-cycle cost, and overall performance. For example, according to the 2021 Report Card for American’s Infrastructure of the American Society of Civil Engineers (ASCE) [1], the amount of money needed to fix existing civil infrastructures in the USA is in the order of six (6) trillion USD; most of this is in connection to corrosion-related concrete deterioration.
Corrosion of steel embedded in concrete is an electrochemical process that occurs when a potential difference along the bars forms a cell with anode and cathode zones on the steel, and the pore water in the hardened cement paste serves as electrolyte [2].