Published June 2018 | Version v1
Journal article Metadata-only

Influence of calcium ion in concrete pore solution on the passivation of galvanized steel bars

Creators

  • 1. University of Chinese Academy of Sciences, Beijing 100049 (China)
  • 2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong (China)
  • 3. Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071 (China)
  • 4. College of Chemical Engineering and Technology, Sun Yat-sen University, Tangjiawan, Zhuhai, 519082 (China)

Description

The addition of supplementary cementitious materials may affect the Ca2+ concentration and pH value of the concrete pore solutions. This work studied the influence of the calcium ion on the passivation of the galvanized steel bars in simulated concrete pore solutions with relatively low pH value of 12.5 and 13.15. The results showed that continuous protective layers were formed on the galvanized coating in the solutions with saturated Ca(OH)2 at pH 12.5 and solutions with either KOH or NaOH at pH 13.15. The passive film formed in the saturated Ca(OH)2 solution showed better protective properties than those in other solutions. In the solutions with lower concentrations of Ca2+ at pH 12.5, there was no obvious reaction and no protective layer was formed on the surface.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.cemconres.2018.03.001

Additional details

Identifiers

DOI
10.1016/j.cemconres.2018.03.001;
PII
S0008884617311341;

Publishing Information

Journal Title
Cement and Concrete Research
Journal Volume
108
Journal Page Range
p. 46-58
ISSN
0008-8846
CODEN
CCNRAI

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
50050884
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CALCIUM HYDROXIDES; CALCIUM IONS; COMPUTERIZED SIMULATION; CONCENTRATION RATIO; CONCRETES; CORROSION; PASSIVATION; PH VALUE; POTASSIUM HYDROXIDES; SODIUM HYDROXIDES; SOLUTIONS; STEELS; SURFACE COATING; THIN FILMS
Descriptors DEC
ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; ALLOYS; BUILDING MATERIALS; CALCIUM COMPOUNDS; CARBON ADDITIONS; CHARGED PARTICLES; CHEMICAL REACTIONS; DEPOSITION; DIMENSIONLESS NUMBERS; DISPERSIONS; FILMS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; HYDROXIDES; IONS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MIXTURES; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; SIMULATION; SODIUM COMPOUNDS; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.