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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 203 - 210 (8page)
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This paper compares the inhibition properties of aspartic and lactic acid salts with nitrite ions andtheir effect on critical chloride concentration. The tests were carried employing carbon steel specimensin saturated lime solution with varying pH in the range between13 to 13.6. The critical chlorideconcentration was estimated through multiple specimen potentiostatic tests at potentials in the usualrange for passive rebar in the alkaline concrete of atmospheric structures. During tests, chloride saltwas added every 48 h until all the specimens showed localized attacks. The cumulative distributioncurves, i.e. the number of corroded specimens as a function of the chlorides concentration was obtained. Furthermore, IR spectra were recorded for the evaluation of the presence of the organic inhibitorson the passivity film. The results confirmed the inhibitory effect of 0.1M aspartate comparable withnitrite ions, at a similar concentration. Addition of calcium lactate did not result in an increase inthe critical chloride concentration. However, the formation of a massive scale containing the substancethat could reduce the corrosion propagation was observed.
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