The electrochemical performance and modification mechanism of the corrosion inhibitor on concrete

Abstract

The purpose of this study was to solve the chloride corrosion damage problems of the rebar in reinforced concrete structures under the chloride environment. The effects of 1.0% triethanolamine (abbreviated as 1.0% TEA), 1.0% Ca(NO2)2, and 0.5% TEA + 0.5% Ca(NO2)2 (abbreviated as 1.0% composite corrosion inhibitor) on the electrochemical performance and modification mechanism of the mortar specimens were investigated by combining macro experiment and microanalysis. The results showed that the electrode potential of the rebar was effectively improved by incorporating the 1.0% composite corrosion inhibitor. This composite corrosion inhibitor displayed the ability to stabilize the electrode potential of the rebar; it also formed a passive film on the surfaces of the rebar, protected the rebar from chloride attack, and achieved satisfactory electrochemical performance. In addition, it could also effectively improve the strength of the mortar specimens and possessed the strong ability to bind chloride ions, thus signifying that it could promote cement hydration and accelerate the formation of cement to form AFt crystals. Therefore, the results of this investigation confirmed that this composite corrosion inhibitor could be effectively used in practical engineering to prevent the corrosion of reinforced concrete structures.

Inhibition Effect of Hydrophobic Functional Organic Corrosion Inhibitor in Reinforced Concrete

“…Table 9 shows a comparison of the inhibition efficiency of the hydrophobic functional organic corrosion inhibitor and the conventional corrosion inhibitors found in the reported studies on concrete [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. It can be observed in Table 9 that, due to the different compositions and concentrations of corrosion inhibitors, together with the different concentrations of chlorides in concrete, the reported inhibition efficiencies in previous studies were of a very wide range.…”

Inhibition performance of uniconazole on steel corrosion in simulated concrete pore solution: An eco-friendly way for steel protection

“… Biopolymers, ionic liquids, fatty acids, plant extracts, etc. Uniconazole Inhibition efficiency Medium [ 18 , 52 ] High [ 24 , 53 ] High Environmental friendliness Harmful [ 17 ] Friendly [ 27 ] Friendly [ 29 ] Health hazards to humans Harmful [ 15 ] Friendly [ 28 ] Friendly [ 29 ] Production complexity / Complex [ 25 , 26 ] Easy [ 17 ] Cost / High [ 25 , 26 ] Low [ 17 ] …”

Treatment of corrosion inhibitor in highly mineralized gas field water by advanced oxidation technology

“…The Fenton oxidation mechanism is that under acidic conditions, ferrous ions (Fe 2+ ) as a catalyst catalyze hydrogen peroxide (H2O2) to generate hydroxyl radicals (•OH) with high reactivity and strong oxidizing ability, which convert organic matter and reduce Oxidation of substances [10,11]. The main reaction process is as follows:…”