Title:
Multifunction Green Corrosion Inhibiting Admixtures for Mortar under Chloride Environment
Author(s):
Yu Jiang, Gang Xu, Zhipeng Li, and Xianming Shi
Publication:
Symposium Paper
Volume:
336
Issue:
Appears on pages(s):
54-72
Keywords:
green corrosion inhibitor, chloride induced corrosion, setting time, flowability, water absorption, gas permeability, EIS, LPR
DOI:
10.14359/51722456
Date:
12/11/2019
Abstract:
In this study, we tested compressive strength, rheology, initial setting time and transport properties of mortar samples mixed with green corrosion-inhibiting admixtures were tested. Four types of green corrosion inhibitors were adopted, which were extracted from peony leave, Kentucky blue grass, sugar beet leave and dandelion. All of them affected the compressive strength adversely but improved other properties of mortar samples. Resistance of mortar to chloride induced corrosion was evaluated using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques. The results indicated that these green corrosion-inhibiting admixtures provided promising inhibiting performance under chloride environment. The results also suggested these green corrosion-inhibitors have the potential to be used as multifunction corrosion inhibitors for concrete, such as serving as water reducer and set retarder. Future work would focus on chemical mechanism of green corrosion inhibitors and the comparative evaluation of these green corrosion inhibitors with other commercially available corrosion inhibitors.
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