Performance of Anticorrosive Measures of Steel in Concrete Infrastructure by Plant‐Based Extracts

Abstract

Competence to combat corrosion of steel‐reinforced concrete (SRC) infrastructures for long periods has become a fascinating topic for corrosion scientists. The longevity of such infrastructures is limited mainly by the corrosion process. Hence, urgent demands for developing effective and practical methods are necessary to minimize the corrosion of such concrete structures. The anti‐corrosive components can be designed from the green plants' parts to mitigate the SRC corrosion in recent years. The ongoing research aims to substantiate the success of the leaf extract of Psidium guajava (LEPG) and its 50% blend (BnD) with the leaf extract of Mangifera indica (LEMI) for assessing the steel corrosion condition in a concrete slab. For this purpose, a fast corrosion potential monitoring (CPM) method is applied per the ASTM procedure. Outcomes of the work summarized that the additions of 500–4000 ppm LEPG and its 50% BnD blend have significant corrosion‐inhibiting action. The corrosion potential (ϕcorr) shifts toward a less corrosion‐risk area of the steel bar for 6 months at ambient conditions.

The anti-degradation consequences of water repellent-based inhibitors for controlling mild steel corrosion in concrete composite

“…The high corrosion resistance effect of these two types of hybrid inhibitors to the SRC slab is attributed mostly due to the presence of high amounts of secondary metabolites (i.e., phenols, alkaloids, flavonoids, saponin, steroids, tannins, terpenoids, etc.) in the plant extracts [22,40], as noticed from the FTIR analysis data of these two types of plant-based extracts (Table 3). Such phyto-molecules of the plant extract are constituted mainly of O, N or S hetero-atoms together with aromatic, and π-electron-rich compounds in the methanol extracts of the plant-based materials [41], and they show generally high basicity including electron density properties [42].…”

“…Also, the methanolic leaf extracts of Mangifera indica (MILE) and Psidium guajava (PGLE) powder were separately used to prepare two hybrid inhibitors with the synthetic WRep-B (i.e., WRep-B+MILE, WRep-B+PGLE), which were further applied to study their corrosion inhibition effects to the RS in the concrete composite. The details of the preparation methods of the MILE and PGLE were described elsewhere [22].…”