In terms of cathodic protection, what is the typical potential range for steel?

The typical potential range for steel in cathodic protection systems is generally recognized as -200 to -800 mV. This range is critical because it aligns with the requirements for effective cathodic protection, ensuring that the steel is sufficiently polarized to prevent corrosion.

In this range, the potential ensures that the steel surface is adequately protected by maintaining a negative charge, which reduces the likelihood of corrosion reactions occurring at the metal surface. The cathodic protection system, often involving impressed current or sacrificial anodes, aims to bring the potential of the metal down within this specified range, thus safeguarding it from environmental factors that could lead to deterioration.

Understanding this range is essential for professionals involved in cathodic protection, as it informs the calibration of testing equipment and monitoring of protective measures. Regular monitoring within this range helps in assessing the effectiveness of the cathodic protection system and making necessary adjustments to ensure ongoing metal integrity.