An Interaction between Praseodymium 4-Hydroxycinnamate with AS1020 and X65 Steel Microstructures in Carbon Dioxide Environment

Abstract

This work reports on the application of a rare earth organic compound, praseodymium 4-hydroxycinnamate -Pr(4OHCin) 3 , as an effective inhibitor suitable for preventing carbon dioxide corrosion of steels in an aggressive environment. Two steels, namely an AS1020 and a X65 steel, have been tested in 0.01 M NaCl solution saturated with carbon dioxide gas using electrochemical and surface analysis techniques. The results show that X65 steel is less susceptible to corrosion than AS1020 steel in CO 2 -saturated 0.01 M NaCl solution as indicated by a lower corrosion current density and a higher polarization resistance. On the other hand, the AS1020 was inhibited much more effectively by praseodymium 4-hydroxycinnamate compound in comparison with X65 steel, as the corrosion behavior of AS1020 and X65 steels was similar in the presence of the inhibitor. However, the inhibiting effects on the anodic reaction was greater for AS1020 due to a reduction in the anodic current density in comparison with X65 steel. The dramatic effect of praseodymium 4-hydroxycinnamate compound could be attributed to the protective inhibiting deposits and enhanced film formation on the more active steel surface.

Electrochemical and Surface Characterization Study on the Corrosion Inhibition of Mild Steel 1030 by the Cationic Surfactant Cetrimonium Trans-4-hydroxy-cinnamate

“…This effect was ascribed to the additional surface film deposited on the cathodic zones due to the hydrolysis of the rare-earth ions. 11 The similarity of the pore resistances, R pore , in the four cases suggests that this parameter could be representing the same material, i.e., the exposed iron in the case of the sample immersed in the control solution and the iron beneath the porous matrix in the case of the sample immersed in the inhibitor solution.…”

“… 10 In addition to lanthanum and cerium counterions for cinnamate compounds, other rare-earth elements have also been tested; e.g., praseodymium 4-hydroxycinnamate, Pr(4OHCin) 3 , was reported to inhibit cathodic and anodic reactions simultaneously on mild steel immersed in saturated CO 2 saline solutions by forming a densely packed crystalline film. 11 Similarly, yttrium 4-nitrocinnamate, Y(NO 2 Cin) 3 , showed good corrosion inhibition properties of mild steel in saline solutions, where surface analysis indicated the Y(NO 2 Cin) 3 hydrolysis resulting in precipitates and the development of a protective layer. 12 …”

Management strategies applied in water stations used in the food industry in order to increase the quality of the biogas

“…The non-financial indicators are thus extrapolated to the station level by choosing the quality of the biogas and the wastewater indicators that ensure the quality of the biogas. This ensures the profitability of the treatment plant which under normal conditions is a large consumer of funds allocated for environmental protection by the factory to which it belongs (Al Seadi et al 2013, Nam et al 2018.…”

A Study on the Localized Corrosion Inhibition for Mild Steel in Saline Solution

“…However, in case of practical applications, it is totally a different scenario which should face a poor corrosion resistance in all kinds of aggressive environments such as industrial cleaning, acid corrosion in the acid picking processes, acid rain, and oil well acidification, as well as ocean environment [2,3]. Therefore, many attempts have been recommended for mitigating the steel corrosion using the control of its microstructure [4], coatings [5], surface treatments [6], adding certain alloying elements [7], and self-assembly of organic molecules on a solid surface or at the solid-liquid interface [8], as well as the corrosion inhibitors [9][10][11][12][13]. Among these methods, addition of corrosion inhibitor to the environment has been tremendously used as the ideal way for improving corrosion resistance of steel due to the cost savings, easy to use, and not interrupting any processes.…”

“…Among these methods, addition of corrosion inhibitor to the environment has been tremendously used as the ideal way for improving corrosion resistance of steel due to the cost savings, easy to use, and not interrupting any processes. Consequently, many studies have been investigated the corrosion inhibitions and its mechanism in steels [9][10][11][12][13]. Chromates and molybdates are widely used as corrosion inhibitors due to the effective corrosion protection.…”