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March 25, 2026Open Access

On the impact of cathodic polarization on the chloride threshold for carbon steel in concrete

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Authors

KFKonstantin FacheSKSylvia KeßlerJHJörg Harnisch

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Overview

Experimental analysis reveals how steel potential affects chloride threshold in concrete systems, suggesting improved corrosion models.

Key Points

  • The research investigates how changes in steel potential influence the chloride threshold for carbon steel in concrete.
  • Analyzed the effect of cathodic polarization on chloride threshold in concrete specimens with embedded rebars.
  • Exposed specimens to a cyclic wetting–drying regime using NaCl solution under varying potentials.
  • Developed a quantitative model based on results comparing intrinsic and extrinsic mechanisms of corrosion.
  • Chloride threshold remains stable above a specific steel potential but rises at more cathodic potentials.
  • Quantitative model indicates chloride threshold increases with a notable potential shift.
  • Intrinsic modifications from cathodic polarization enhance passive layer benefits alongside external effects from chloride migration.

Cite This Study

Fache et al. (2026) studied this question.

synapsesocial.com/papers/69c37bf3b34aaaeb1a67ee83https://doi.org/10.25974/fhms-20229
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