Corrosion protection with eco-friendly inhibitors

Abstract

Corrosion occurs as a result of the interaction of a metal with its environment. The extent of corrosion depends on the type of metal, the existing conditions in the environment and the type of aggressive ions present in the medium. For example, CO 3 −2 and NO −3 produce an insoluble deposit on the surface of iron, resulting in the isolation of metal and consequent decrease of corrosion. On the other hand, halide ions are adsorbed selectively on the metal surface and prevent formation of the oxide phase on the metal surface, resulting in continuous corrosion. Iron, aluminum and their alloys are widely used, both domestically and industrially. Linear alkylbenzene and linear alkylbenzene sulfonate are commonly used as detergents. They have also been found together in waste water. It is claimed that these chemicals act as inhibitors for stainless steel and aluminum. Release of toxic gases as a result of corrosion in pipelines may lead in certain cases to air pollution and possible health hazards. Therefore, there are two ways to look at the relationship between corrosion and pollution: (i) corrosion of metals and alloys due to environmental pollution and (ii) environmental pollution as a result of corrosion protection. This paper encompasses the two scenarios and possible remedies for various cases, using ‘green’ inhibitors obtained either from plant extracts or from pharmaceutical compounds. In the present study, the effect of piperacillin sodium as a corrosion inhibitor for mild steel was investigated using a weight-loss method as well as a three-electrode dc electrochemical technique. It was found that the corrosion rate decreased as the concentration of the inhibitor increased up to 9×10−4 M; 93% efficiency was exhibited at this concentration.

Lab Non Destructive Test to Analyze the Effect of Corrosion on Ground Penetrating Radar Scans

“…The importance of corrosion damage in reinforced concrete structures has led to applications in this field, showing the potential in qualitative analysis (e.g., [17,20,31,32]). Several studies have shown a significant decrease in the amplitude of the GPR reflected wave in parts of the radar images [17].…”

Application of Plants Extracts as Green Corrosion Inhibitors for Steel in Concrete - A review

“…Several researchers proposed mechanism of steel corrosion in concrete (Shahid, 2011;Jae et al, 2016;Cabrini et al, 2015;Elsener, 2001;Söylev, 2008;Ormellese et al, 2006;Page, 1975;Hausmann, 1967;Gouda, 1970;Valcarce, 2008;Freire, et al, 2009;Cabrini, 2002;Asma et al, 2011). All agree that corrosion on rebar is influenced by properties of concretes.…”

Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution Using Extraction of Linum Usitatissimum Seeds

“…When applying inhibitors, the most adaptable technique for investigating corrosion kinetics is potentiodynamic polarization. Figure (1) shows anodic and cathodic polarization of the mild steel in sulfuric acid solutions with and without the addition of different concentrations of LU. The figure shows that as the inhibitor concentration increases, the corrosion current decreases.…”

“…Sulfuric acid is one of the most difficult common acids to handle when considering corrosion. There are various organic inhibitors that decrease the corrosion rate of mild steel in acidic solutions [1] . The efficiency of an organic inhibitor is mainly dependent on its ability to be adsorbed on the metal surface.…”

“…The efficiency of an organic inhibitor is mainly dependent on its ability to be adsorbed on the metal surface. Organic inhibitors are compounds that usually contain heteroatoms (such as O, N, S) and multiple bonds in their molecules through which they are adsorbed on the metal surface [1] . These compounds either form strong co-ordination bonds with metal atoms or form passive films on the surface [2] .…”