Organic corrosion inhibitors for industrial cleaning of ferrous and non-ferrous metals in acidic solutions: A review

Goyal, Madhusudan; Kumar, Satish; Bahadur, Indra; Verma, Chandrabhan; Ebenso, Eno E.

doi:10.1016/j.molliq.2018.02.045

Cited by 407 publications

(141 citation statements)

References 167 publications

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“…The corrosion is a natural progression that outcomes into big financial and safety losses of the industrial as well as domestic metallic assets. According to NACE, recent universal yearly cost of corrosion is nearly $ 2.5 trillion USD that contributes around 4.2% of the total GDP (gross domestic product) . In India and South Africa, annual costs of corrosion are around $ 100 billion and $ 9.6 billion USD, respectively.…”

Section: Introductionmentioning

confidence: 99%

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Verma

Verma²,

Ebenso

et al. 2018

Heteroatom Chemistry

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Use of organic compounds containing nitrogen (N), oxygen (O), sulfur (S), and phosphorus (P) heteroatoms in their molecular structures is one of the most effective, economic, and practical corrosion inhibitors. The effectiveness of the heteroatoms toward metallic corrosion inhibition follows the order: P > S > N > O. The metal‐inhibitor interactions involve the charge sharing between the heteroatoms and empty d‐orbitals of the surface metallic atoms; therefore, a heteroatom with lower electronegativity value is more potent to form strong bonding (charge sharing) with metallic surface as compared to more electronegative heteroatom. Literature study reveals that almost all corrosion inhibitors have either one or more heteroatoms in their molecular structures particularly in the form of polar functional groups, which enhance their adsorption tendency on metallic surface. Present review paper features the collection of some major works that have been published on metallic corrosion inhibition containing these P, S, O, and N heteroatoms. Since now, several review articles have been published describing the application of N and O atoms; however, the reviews on use of P and S heteroatoms are scare. Therefore, aim of the present article was to mainly describe the collection of corrosion inhibitors containing S and P heteroatoms.

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Section: Introductionmentioning

confidence: 99%

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Verma

Verma²,

Ebenso

et al. 2018

Heteroatom Chemistry

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127

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“…The intrinsic organic chemical compounds in the inhibitors replace water molecules on the metal surface through physical or chemical adsorption, thus forming a protective layer over the metal which prevents it from further degradation. The type of adsorption involved in any inhibitory episode is determined by the chemical structure of organic inhibitors 1 3 [3][4][5], charge distribution in the molecule [6][7][8], nature of surface charges, pH and/or electrode potential [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Many researches focused on the use of native flora, as an alternative environmentally friendly corrosion inhibitors are on-going [22,26,27]. The benefit being that these materials had either been used as food or herb for centuries, and contain naturally occurring synthetic aromatic substances bearing heteroatoms, like, nitrogen, oxygen, phosphorous and/or sulphur [4,7,28]. Psidium Guajava seeds extract in HCl solution had been used to investigate the corrosion properties of aluminium with favorable results [25].…”

Section: Introductionmentioning

confidence: 99%

Newbouldia laevis Leaves Extract as Tenable Eco-Friendly Corrosion Inhibitor for Aluminium Alloy AA7075-T7351 in 1 M HCl Corrosive Environment: Gravimetric, Electrochemical and Thermodynamic Studies

2020

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The corrosion inhibition evaluation of aluminium alloy AA7075-T7351 in 1.0 M HCl environment, by biologically active and water soluble luteolin 7-glucoside and phenolic polymeric compounds in Newbouldia laevis (NBL) extracts-as organic corrosion inhibitors of aluminium-have been investigated using gravimetric, electrochemical and thermodynamic techniques respectively, at room temperature (25 ± 1 °C), and at elevated temperatures of 40, 50, 60 and 65 °C. Gravimetric results showed that optimal inhibition efficiency ( ), at room temperature (298 ± 1 K) and 338 K are 86.1% and 67.5% respectively for the maximum concentration of 0.6 g/L. This suggests that NBL extract was affected by temperature and accomplished the inhibiting episode through an electrostatic pull of the polymeric components of the NBL extract onto AA7075-T7351 coupons or physical adsorption, that obeyed Langmuir, Freundlich and Temkin adsorption isotherms, in increasing order; Temkin, Freundlich and Langmuir. Adsorption coefficient, K ads , and Gibb's free energy of adsorption, ΔG 0 ads , values obtained from Temkin isotherms were high and proved that adsorption of NBL on AA7075-T7351 surfaces were strong and spontaneous. Potentiodynamic polarization and electrochemical impedance spectroscopy results showed that NBL is a mixed-type corrosion inhibitor of AA7075-T7351 in 1 M HCl environment, which was achieved through the blockage/obstruction/reduction of charge flow by the polymeric barrier on the aluminium alloy's surface. Increases in the linear part of the Bode plot slopes with increase in NBL concentrations further indicated the existence of a protective layer on the AA7075-T7351 surface.

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“…2019, 9, 3896 2 of 17 latter largely present at the outmost surface of both Cu and the Cu5Zn5Al1Sn alloy [7,11]. Although a big difference exists in their corrosion rates, the corrosion process is highly administered by the molecular diffusion between the metal surface and the electrolyte [12].One approach to prevent corrosion of Cu and its alloy is the use of corrosion inhibitors [13,14]. Among the corrosion inhibitors used in practice, cysteine (Cys) is found to be widely employed for Cu protection in various media [15,16].…”

mentioning

confidence: 99%

“…One approach to prevent corrosion of Cu and its alloy is the use of corrosion inhibitors [13,14]. Among the corrosion inhibitors used in practice, cysteine (Cys) is found to be widely employed for Cu protection in various media [15,16].…”

mentioning

confidence: 99%

The Protection Role of Cysteine for Cu-5Zn-5Al-1Sn Alloy Corrosion in 3.5 wt.% NaCl Solution

et al. 2019

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In this work, the corrosion mechanism of a Cu-5Zn-5Al-1Sn alloy was examined in a 3.5 wt.% NaCl solution. At the same time, the effect of a cysteine inhibitor was also investigated through a multi-analytical approach. Electrochemical results suggested that inhibition efficiency increased with the increase of cysteine concentration. From potentiodynamic polarization (PD) analysis, a decrease in corrosion current and corrosion potential shift toward a more negative direction was observed. The potential difference between the blank and inhibited surface was found to be 46 mV, which is less than 85 mV, revealing a mixed type inhibition effect of cysteine for the Cu-5Zn-5Al-1Sn alloy. The inhibition mechanism of cysteine (Cys) and the effect of alloying elements were investigated by fitting experimental impedance data according to a projected equivalent circuit for the alloy/electrolyte interface. A Langmuir adsorption isotherm was proposed to explain the inhibition phenomenon of cysteine on the Cu-5Zn-5Al-1Sn alloy surface. Surface morphology observation confirmed that the Cu-5Zn-5Al-1Sn alloy was damaged in 3.5 wt.% NaCl solution and could be inhibited by using the cysteine inhibitor. The impact of alloying elements on the corrosion mechanism was further examined by surface analysis techniques such as X-Ray photoelectron spectroscopy (XPS)/Auger spectra, the results of which indicated that the corrosion inhibition was realized by the adsorption of the inhibitor molecules at the alloy/solution interface. Appl. Sci. 2019, 9, 3896 2 of 17 latter largely present at the outmost surface of both Cu and the Cu5Zn5Al1Sn alloy [7,11]. Although a big difference exists in their corrosion rates, the corrosion process is highly administered by the molecular diffusion between the metal surface and the electrolyte [12].One approach to prevent corrosion of Cu and its alloy is the use of corrosion inhibitors [13,14]. Among the corrosion inhibitors used in practice, cysteine (Cys) is found to be widely employed for Cu protection in various media [15,16]. Cysteine is an amino acid that contains a -SH group in addition to the amino group; this mercaptan group is strongly attracted to copper. A. A. Nazeer et al. have studied the inhibitive effect of cysteine on a Cu10Ni alloy in sulfide containing atmospheres [16]. Based on this study, cysteine can act as a mixed-type inhibitor and cysteine molecules are adsorbed on the alloy surface. The inhibition mechanism of cysteine with copper-based materials is characterized by the formation of a stable Cu (I)-cysteine complex [17]. As confirmed by many researchers, the better corrosion inhibition effect of cysteine relies on its surface adsorption through sulfur atoms [18,19]. I. Milošev et al. on the other hand have studied different amino acids as inhibitors for copper in acidic environments and confirmed that cysteine has higher efficiency. Based on their molecular dynamic simulation results, it has been suggested that the -SH group is in charge of the good protective effect of cysteine [20...

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Organic corrosion inhibitors for industrial cleaning of ferrous and non-ferrous metals in acidic solutions: A review

Cited by 407 publications

References 167 publications

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Newbouldia laevis Leaves Extract as Tenable Eco-Friendly Corrosion Inhibitor for Aluminium Alloy AA7075-T7351 in 1 M HCl Corrosive Environment: Gravimetric, Electrochemical and Thermodynamic Studies

The Protection Role of Cysteine for Cu-5Zn-5Al-1Sn Alloy Corrosion in 3.5 wt.% NaCl Solution

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