Title:
Corrosion Inhibitors for Use in Concrete
Author(s):
Brian B. Hope and Alan K. C. Ip
Publication:
Materials Journal
Volume:
86
Issue:
6
Appears on pages(s):
602-608
Keywords:
calcium; chlorides; corrosion resistance; measurement; nitrites; reinforced concrete; reinforcing steels; tests; Materials Research
DOI:
10.14359/2270
Date:
11/1/1989
Abstract:
Effects of calcium nitrite and stannous chloride on corrosion protection of steel samples submerged in oxygenated lime water containing calcium chloride were examined electrochemically and visually. Electrochemical measurements included half-cell potential, AC impedance, polarization resistance, and Tafel plot. Under the test conditions, calcium nitrite appeared to be a promising corrosion inhibitor. The nitrite/chloride ion threshold level for corrosion was between 0.07 and 0.09. Stannous chloride, however, was found to be ineffective for corrosion protection in the range of dosage considered.