Monitoring of chloride-induced corrosion in steel rebars

Chengming Lan, Muhuiti Tuerhan, Caiping Liu, Hui Li, B. F. Spencer

Research output: Contribution to journalArticle

Abstract

Chloride-induced corrosion is very serious for steel rebar, because chloride-induced corrosion causes local disruption in the passive layer of the steel, forming surface pits. This paper proposes a novel corrosion monitoring method for steel rebars on the basis of the stress concentration in the plane stress condition caused by chloride-induced corrosion. The fundamentals of corrosion monitoring and the design concept of the proposed sensor are illustrated. The influence factors for corrosion monitoring are simulated to improve the sensitivity. Potentiostatic accelerated corrosion tests are conducted to evaluate the efficacy. The studies indicate that this indirect method for monitoring changes of physical properties caused by corrosion is effective. Influence factors in chloride-induced corrosion can be neglected, as compared with electrochemical techniques. The proposed corrosion monitoring method can provide useful information to evaluate the risk of corrosion initiation and propagation for steel rebars.

Original languageEnglish (US)
Pages (from-to)601-610
Number of pages10
JournalCorrosion Engineering Science and Technology
Volume53
Issue number8
DOIs
StatePublished - Nov 17 2018

Keywords

  • Chloride-induced corrosion
  • monitoring
  • plane stress condition
  • steel rebar
  • stress concentration

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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