The behaviour of praseodymium 4-hydroxycinnamate as an inhibitor for carbon dioxide corrosion and oxygen corrosion of steel in NaCl solutions

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

“…The mixture was then refluxed for 30 h. The solvent was removed under reduced pressure, and the crude product was treated with a mixture of ether/petroleum ether and the 4-amino-2-(4-chlorophenyl)-8-(2,3-dimethoxyphenyl)-6-oxo-2,6-dihydropyrimido [2,1-b] [1,3]thiazine-3,7-dicarbonitrile (ACMPT) precipitate, and it was recrystallized from EtOH. The synthetic approaches adopted to obtain the target compounds (ACMOPT) are shown in Scheme 1.…”

“…The choice of pyrimidothiazine as an inhibitor is based on the good results obtained with this type of heterocyclic compounds in different media [13][14][15][16]. In the present work, 4-amino-2-(4-chlorophenyl)-8-(2,3-dimethoxyphenyl)-6-oxo-2,6-dihydropyrimido [2,1-b] [ 1,3] thiazine-3,7-dicarbonitrile (ACMPT) was investigated as a corrosion inhibitor for carbon steel in 1.0 M HCl, using detailed gravimetric measurements, electrochemical impedance spectroscopy and quantum chemical calculations. …”

“…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].…”

The Corrosion Protection on Steel Pipe St 41 in Water Plumbing Environmental Using Natrium Carbonate (Na2co3) as Inhibitor

“…The losses caused by corrosion are a form of maintenance costs, replacement costs of materials, plant shutdown, loss of production, and others [6]. The addition of inhibitor is useful in material that does not allow the use of protection methods such as coating and cathodic protection [7,8]. The addition of inhibitors used in a concentration either continuously or sporadically.…”

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.…”