A study of 4-carboxyphenylboronic acid as a corrosion inhibitor for steel in carbon dioxide containing environments

A Study on Praseodymium 4-Hydroxycinnamate as an Inhibitor for Carbon Steel in Fresh Cooling Water System of Ca Mau Fertilizer Plant

“…Whereas, carbon steel immersed in 0.1 M NaCl solution showed pitting corrosion due to a rapid increase in current density. Interestingly, lower passive current density and the wider range of passive potential in the results of steel immersed in 0.1 M NaCl solution containing Pr(4OhCin) 3 compound were performed in comparison with that of the result of steel immersed in 0.1 M NaCl solution containing TRACT 109, suggesting higher inhibition performance and pitting inhibition. In addition, lower passive current density and the wider range of the passive potential were noticed to an increase of Pr(4OhCin) 3 compound concentration up to 300 ppm, whereas the current density performed in 600 ppm slightly increased in contrast to 300 ppm.…”

“…TRACT 109 with main nitrite component was supplied by Ca Mau fertilizer plant and Pr(4OHCin) 3 can be found in the previous publication [28]. In this study, Pr(4OHCin) 3 and TRACT 109 were added to 0.1 M NaCl solutions using reagent grade sodium chloride purchased from Sigma Aldrich, distilled water, and 12 hours of stirring with the concentration of 0, 100, 300 and 600 ppm of Pr(4OHCin) 3 , while TRACT 109 with the concentration of 1500, 2000, 2400, and 3000 ppm, where Ca Mau fertilizer plant has been using the range of concentration from 2000 to 2400 ppm. The working electrodes used for the electrochemical tests were made from carbon steel with the dimension of 10 mm × 10 mm × 3 mm which were mounted by epoxy resin according to ASTM G5-94 standard.…”

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

“…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.…”

“…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.…”

Experimental and Theoretical Studies of the Corrosion Inhibition of 4-amino-2-(4-chlorophenyl)-8-(2, 3-dimethoxyphenyl)-6-oxo-2, 6-dihydropyrimido [2, 1-b][1, 3] thiazine-3,7-dicarbonitrile on Carbon Steel in a 1.0 M HCl Solution

“…Mild steel is widely used in different areas, such as in chemical processing, marine application, petroleum production and refining, and construction [1][2][3][4]. Furthermore, hydrochloric acid solutions are widely used for the pickling, cleaning, desaling and etching of mild steel [5][6][7].…”