Investigation on some Schiff bases as HCl corrosion inhibitors for carbon steel

Yurt, A.; Balaban, A.; Kandemir, S.Ustün; Bereket, Gözen; Erk, Birgül

doi:10.1016/j.matchemphys.2004.01.033

Cited by 380 publications

(143 citation statements)

References 11 publications

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“…In hydrochloric acid solution, the corrosion of iron and steel takes place via the following proposed mechanism [39,40]. According to this mechanism, the anodic dissolution of iron occurs as follows:…”

Section: Mechanism Of Corrosion and Inhibitionmentioning

confidence: 99%

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

et al. 2017

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The application of expired drugs as corrosion inhibitors provides a cost effective and environmentally benign alternative to otherwise tedious and costly disposal/ degradation process. In this context, we herein investigate the use of expired atorvastatin (EA) for corrosion inhibition of mild steel in 1 M HCl solution using weight loss, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (Tafel) methods. Fresh atorvastatin (FA) drug was also used for above studies for comparison purpose to understand whether there is any significant difference between the inhibition efficiency of the two after the expiration date of the drug. EIS analysis shows an increase in polarization resistance due to the adsorbed inhibitor molecules on metal surface. Potentiodynamic polarization indicates that both the EA and FA act as mixed-type inhibitors but predominantly behave as cathodic inhibitors. The adsorption of EA and FA on mild steel surface follows the Langmuir adsorption isotherm. SEM shows a smoother surface of mild steel in the presence of FA and EA drug in acidic solution. Both the fresh drug and its expired counterpart showed almost similar results in all the studies, thereby verifying the validity of the expired atorvastatin drug as a novel and efficient corrosion inhibitor for mild steel.

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Section: Mechanism Of Corrosion and Inhibitionmentioning

confidence: 99%

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

et al. 2017

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“…-methyl-4-morpholin-4-yl-2-oxo-1,2,3,4-tetrahydro-pyrimidine-5-carboxylic acid ethyl ester, 6-methyl-4-morpholin-4-yl-2-thioxo-1,2,3,4-tetrahydro-pyrimidine-5-carboxylic acid ethyl ester, 6-methyl-4-morpholin-4-yl-2-oxo-1,2,3,4-tetrahydro-pyrimidine-5-carboxylic acid hydrazide, 6-methyl-4-morpholin-4-yl-2-thioxo-1,2,3,4-tetrahydro-pyrimidine-5-carboxylic acid hydrazide [20] [21] in 0.1 M HCl; pyrimidine, 2-aminopyrimidine, 2-hydroxypyrimidine hydrochloride, 2-mercaptopyrimidine, 2,4-diaminopyrimidine, 2,4,6-triaminopyrimidine, 2,4-diamino-6-hydroxypyrimidine and 2,4-diamino-6-meracaptopyrimidine [7], N-(pyrimidin-2-ylcarbamothioyl)- [26], thiazolo-pyrimidine derivatives [27], aminopyrimidine derivatives [28] [39] for stainless steel 304 have been studied by using various techniques (Table 1). Studies reported that the adsorption of the pyrimidine derivative on steel surface mainly depends on its physico-chemical properties, electronic density of donor atom and possible interaction of its π-orbitals with d-orbitals of the surface atom.…”

Section: Corrosion Inhibitorsmentioning

confidence: 99%

“…However, there are some compounds which act as cathodic-type inhibitors [16,28] and anodic inhibitors [21]. The adsorption of many of these compounds on steel surface followed Langmuir adsorption isotherm, where as few of the compounds were found to obey the Dubinin-Radushkevich adsorption isotherm [33,34], Frumkin adsorption isotherm [7] and Temkin's adsorption isotherm [21]. The scanning electron microscope (SEM) results showed the formation of a protective film on the metal surface in the presence of these additives.…”

Section: Corrosion Inhibitorsmentioning

confidence: 99%

Pyrimidine derivatives as potential corrosion inhibitors for steel in acid medium – An overview

2018

Int. J. Corros. Scale Inhib.

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Acidic environments are widely used in several industrial operations, such as oil well acidification, acid pickling, acid cleaning and acid descaling, which generally lead to serious metallic corrosion. Despite the relatively limited corrosion resistance of carbon steel, it is widely used in marine applications, chemical processing, petroleum production and refining, construction and metal-processing equipments due to its excellent mechanical properties and low cost. Out of several methods, usage of corrosion inhibitor is one of the most important techniques for controlling the corrosion. Several organic inhibitors have been tried for the corrosion inhibition of steel, out of which organic compounds with more than one heteroatom containing pi-electrons are found to exhibit high inhibiting properties by providing electrons which interact with metal surface. However, the use of several heterocyclic inhibitors has caused negative effects on the environment because of their toxicity and nonbiodegradability. In this context, pyrimidine derivatives are found to attract great interest due to their environmentally benign properties. In this article, it is aimed to review the usefulness of pyrimidine derivatives for the corrosion inhibition of steel in acid medium.

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“…These compounds or their transition metal complexes have shown a wide variety of biological activity [5][6][7][8], nonlinear optical properties (NLO) [9,10], optoelectronic properties [11], corrosion inhibition properties [12][13][14], organic co-precipitant [15], applications in analytical [16] and the precursors for nanoparticles [17], etc. Schiff bases act as effective coordination compounds because of certain molecular configurations which contain nitrogen, oxygen and sulfur atoms that can form coordinate covalent bonds with metal ions [5,18]. Meanwhile, the formation of organic compound metal complexes could be realized by functional electronegative groups and π-bonds of Schiff bases, which includes triple and conjuagated double bonds [14].…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the formation of organic compound metal complexes could be realized by functional electronegative groups and π-bonds of Schiff bases, which includes triple and conjuagated double bonds [14]. Schiff bases derived from thiocarbohydrazide have both features, which act as powerful coordination reagents and thereby enable the formation of air-stable complexes with metal ions [18,19]. It is reported that the amine-and thione-substituted triazoles, derived by the condensation of the derivatives of 1,2,4-triazine and the aldehyde or ketone, exhibited a strong affinity to some metal ions, such as Cu(II), Zn(II), Pb(II), Cr(III), Co(II), Ni(II), Mn(II) and Fe(II) [11,15,20].…”

Section: Introductionmentioning

confidence: 99%

Separation of Molybdenite from Chalcopyrite in the Presence of Novel Depressant 4-Amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one

Yin

Sun

et al. 2017

Minerals

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Abstract:In this paper, 4-amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (ATDT) was synthesized and introduced as a depressant for selective flotation separation of molybdenite from chalcopyrite. Its flotation performance and adsorption mechanism on minerals were first investigated by flotation, UV spectra, zeta potential, Fourier Transform Infrared Spectroscopy (FT-IR), and X-ray Photoelectron Spectroscopy Measurements (XPS). The bench scale tests indicated that ATDT exhibited stronger depressing power than chalcopyrite, and the selective index of Mo/Cu improved significantly in the presence of ATDT. The results of the UV spectra, zeta potential and FT-IR demonstrated that ATDT chemisorbed on the chalcopyrite surface. The XPS results further confirmed that ATDT might chemisorb onto the chalcopyrite surface through S and N atoms to form five-membered chelate rings and a postulated adsorption mode was presented. For molybdenite, the different measurements agreed well with each other and implied that ATDT might weakly physisorb onto a molybdenite surface.

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Investigation on some Schiff bases as HCl corrosion inhibitors for carbon steel

Cited by 380 publications

References 11 publications

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

Pyrimidine derivatives as potential corrosion inhibitors for steel in acid medium – An overview

Separation of Molybdenite from Chalcopyrite in the Presence of Novel Depressant 4-Amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one

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