A Comprehensive Overview on Corrosion in RCC and Its Prevention Using Various Green Corrosion Inhibitors

Abstract

Reinforced cement concrete (RCC) is a versatile material that deteriorates over time due to corrosion when exposed to any surrounding aggressive environment. In order to avoid this ramification, many researchers have carried out different work to find the most feasible way to reduce corrosion. To tackle this at the initial stage itself, one such convenient method is through the application of inhibitors. These inhibitors have most applications in their use as an admixture. This review paper mainly focuses on the inhibitor and its types, the drawbacks of inorganic, commercial organic, and hybrid inhibitors, and application to RCC, and also provides detailed information on green corrosion inhibitors (GCI). In recent years, widespread attention has been paid towards the utilization of different natural plant components/parts in concrete structures. This review paper consolidates the work done by various researchers using different GCIs with the main focus on plant extracts as an additive to concrete or RCC specimens which will be significant to sustainable progress in the field of corrosion.

The Use of Plant Extracts as Green Corrosion Inhibitors: A Review

“…In this regard, green corrosion inhibitors have gained a lot of popularity. Their inhibition results are comparable to conventional organic and anodic inhibitors, and in some cases, they have been more efficient, although it has been reported in the literature that the efficiency of some of them decreases greatly at high temperatures [62,[76][77][78]. In fact, the development of green corrosion inhibitors still needs to be improved.…”

“…In general, the inhibition mechanism and inhibition efficiency are directly dependent on the active phytochemical compounds of the plant extract [65,134,137]. The absorption mechanism of GCIs is classified into three ways: chemisorption, physisorption, or a combination of the two (mixed) [76]. In general, the interaction between the charged metal surface and the inhibitor determines the type of absorption;, in fact, the weak polar interaction causes physisorption, and the molecule with strong electrostatic forces on the metal surface causes chemisorption [64,138].…”

“…Evaluating efficiency at different temperatures is essential because many extracts can have very different performances with increasing and decreasing temperatures [82]. In fact, with increasing temperature, the amount of absorption in physisorption and chemisorption decreases and increases, respectively [76,138]. Also, the immersion time can have a great effect on the performance of the inhibitor [82].…”

Green Synthesis of a Novel Cationic Surfactant Based on an Azo Schiff Compound for Use as a Carbon Steel Anticorrosion Agent

“…Corrosion has always presented a significant challenge to the metal industry and its affiliated sectors. The detrimental impact of corrosion results in reduced durability, lower quality, and a shorter lifespan for metal products, consequently driving up industry costs due to the need for part replacements, damage to capital structures, or other necessary mitigation measures. − Metals can be negatively affected by corrosion, which can lead to their dissolution, causing them to lose their original shape and the beneficial properties they once possessed. − Many researchers aim to delay or prevent corrosion, with organic inhibitors being a preferred method due to their cost-effectiveness and high efficiency, typically added in very low concentrations to control corrosion in various industries, especially during processes like acid treatment of mild steel used in industries like petroleum, construction, and pipelines to prevent damage to the metal. − …”

“… 4 − 6 Many researchers aim to delay or prevent corrosion, with organic inhibitors being a preferred method due to their cost-effectiveness and high efficiency, typically added in very low concentrations to control corrosion in various industries, especially during processes like acid treatment of mild steel used in industries like petroleum, construction, and pipelines to prevent damage to the metal. 7 − 13…”