ANODIC POLARISATION MEASUREMENTS OF CORROSION AND CORROSION INHIBITION OF STEEL IN CONCRETE

ANODIC POLARISATION EXPERIMENTS WERE CARRIED OUT ON STEEL IN CONCRETE. THE EFFECTS OF SURFACE TREATMENT OF THE STEEL, MEDIUM OF CURING, AS WELL AS DURATIONS OF CURING WERE INVESTIGATED. CORROSION OF STEEL IN CONCRETE DUE TO THE PRESENCE OF THE CORRODING CHLORIDE IONS, EITHER ADDED TO THE MIXING WATER OR DIFFUSING FROM THE EXTERNAL ATTACKING MEDIUM WAS ALSO INVESTIGATED. WHEN PRESENT IN THE MIXING WATER, THE CHLORIDE IONS ARE MORE EFFECTIVE IN DESTROYING THE PASSIVATION OF STEEL THAN WHEN PRESENT IN THE OUTSIDE MEDIUM. IN THE FORMER CASE A MINIMUM CONCENTRATION OF 1 PERCENT IS REQUIRED FOR THIS ACTION, WHILE IN THE LATTER CASE 4 PERCENT IS REQUIRED. ANODIC CORROSION INFIBITORS LIKE NITRITE, CHROMATE, PHOSPHATE, BENZOATE, AND SILICATE WERE TRIED IN ORDER TO SUPPRESS THE ACTION OF RHE CORRODENT. THE MINIMUM CONCENTRATION REQUIRED OF THE INHIBITOR TO STRIFLE THE CORROSION IS GENERALLY LOWER IN THE CASE WHEN IT IS ADDED TO THE MIXING WATER OF CONCRETE. POSSIBLE MECHANISMS OF CORROSION AND CORROSION INHIBITION ARE DISCUSSED IN THE LIGHT OF THE CURRENT VIEWS OF BOTH PROCESSES. /AUTHOR/

• Supplemental Notes:
  • Vol 1, No 4, PP 138-142, 3 FIG, 2 TAB, 21 REF
• Authors:
  • Gouda, V K
• Publication Date: 1966-1

Media Info

• Serial:
  • British Corrosion Journal

Subject/Index Terms

• TRT Terms: Chlorides; Chromates; Coatings; Concrete; Concrete curing; Concrete mixing; Corrosion; Corrosion resistant steel; Corrosion tests; Ions; Measurement; Metal coating; Metal coatings; Nitrites; Phosphates; Polarization; Protective coating; Rust prevention; Silicates
• Old TRIS Terms: Anodizing
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216320
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 12 1970 12:00AM