The Effect of Chloride Depletion on the Corrosion State of Steel in Alkaline Environment

In the recent literature the efficiency of Cathodic Protection (CP) of steel in concrete is frequently discussed with respect to comparatively small protection currents and often observable potential ennoblement of open circuit potentials (EOC), which are generally explained by repassivation effects occurring during CP. Cathodic polarisation causes chemical alterations at the steel concrete interface, which are beneficial concerning the corrosiveness of the environment. Due to forcing the cathodic partial reaction, the hydroxide ion concentration at the steel surface increases. The applied electric field additionally causes the migration of chlorides to the external anode. The investigations discussed in this paper aim to clarify to which extent the migration of chlorides have impact on repassivation of reinforcement. On the basis of the data obtained, a FEM-model is proposed to calculate the time and voltage-depending migration of chloride ions in consequence of electric fields as applied in CP of steel in concrete.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780415593168
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Eichler, T
  • Isecke, B
  • Wilsch, G
  • Faulhaber, A
  • Weidauer, K
• Conference:
  • Sixth International Conference on Concrete under Severe Conditions: Environment and Loading
  • Location: Merida Yucatan, Mexico
  • Date: 2010-6-7 to 2010-6-9
• Publication Date: 2010-7-5

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 1115-1121
• Monograph Title: Concrete under Severe Conditions: Environment and Loading. Proceedings of the 6th International Conference on Concrete Under Severe Conditions (CONSEC'10), Merida, Yucatan, Mexico, 7-9 June 2010

Subject/Index Terms

• TRT Terms: Cathodic protection; Chlorides; Concrete structures; Corrosion; Reinforced concrete; Reinforcing steel
• Subject Areas: Bridges and other structures; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01444866
• Record Type: Publication
• ISBN: 9780415593168
• Files: TRIS
• Created Date: Aug 31 2012 3:12PM