PHYSICAL MODEL FOR STEEL CORROSION IN CONCRETE SEA STRUCTURES - THEORY

Zdenek P. Bazant*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

291 Scopus citations

Abstract

A physical-mathematical model is developed for concrete exposed to sea water. The model describes: (1)Diffusion of oxygen, chloride ions, and pore water through the concrete cover of reinforcement; (2)ferrous hydroxide near steel surface; (3)the depassivation of steel due to critical chloride ion concentration; (4)the cathodic and anodic electric potentials depending on oxygen and ferrous hydroxide concentrations according to Nernst equation; (5)the polarization of electrodes due to changes in concentration of oxygen and ferrous hydroxide; (6)the flow of electric current through the electrolyte in pores of concrete; (7)the mass sinks or sources of oxygen, ferrous hydroxide, and hydrated red rust electrodes, based on Faraday law; and (8)the rust production rate, based on reaction kinetics. To enable calculations, numerical values of all coefficients are indicated. The theory is completed by formulating the problem as an initial-boundary value problem.

Original languageEnglish (US)
Pages (from-to)1137-1153
Number of pages17
JournalASCE J Struct Div
Volume105
Issue number6
StatePublished - Jan 1 1979

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'PHYSICAL MODEL FOR STEEL CORROSION IN CONCRETE SEA STRUCTURES - THEORY'. Together they form a unique fingerprint.

Cite this