SOME COMMENTS ON REINFORCEMENT CORROSION IN STAGNATING SALINE ENVIRONMENTS. CORROSION OF REINFORCEMENT IN CONCRETE. PAPERS PRESENTED AT THE THIRD INTERNATIONAL SYMPOSIUM ON "CORROSION OF REINFORCEMENT IN CONCRETE CONSTRUCTION", BELFRY HOTEL, WISHAW, WARWICKSHIRE, MAY 21-24, 1990

Stagnating saline environments can be prone to sulphate reducing bacteria (SRB) activity which modifies the chemistry of these waters and therefore influences the aggressiveness of such media towards structural materials. The decrease in pH and concomitant rise in sulphide levels are both parameters of importance to the integrity of concrete and the encapsulated reinforcing steel. The presentation expands on previously published studies in this area by concentrating on mechanistic aspects of steel corrosion in these complex chemical environments. It shows that competition between the processes that disrupt and restore passivity to the steel surface are a central feature of the electrochemistry of these systems, but are not restricted to chloride-related phenomena. The paper also discusses how corrosion susceptibility is affected by the local pH at the steel-concrete interface, by the anions present, and by oxygen availability. The third section of the paper addresses the effects of concrete-environment interactions on the likely nature of the aqueous medium that are seen by the reinforcing steel in the absence of significant macrocracking, and hence how corrosion reactions can further develop.(A) For the covering abstract of the conference see IRRD 831449.

  • Availability:
  • Corporate Authors:

    Elsevier Science Publishers

    Crown House, Linton Road
    Barking, Essex IG11 8JU,   England 
  • Authors:
    • Morgan, TDB
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00606797
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 1-85166-487-4
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM