Theoretical and experimental investigations on corrosion control of 65Cu–35Zn brass in nitric acid by two thiophenol derivatives

Ebrahimzadeh, Mohammad Hosein; Gholami, M.; Momeni, Mojtaba; Kosari, Ali; Moayed, Mohammad Hadi; Davoodi, Ali

doi:10.1016/j.apsusc.2015.01.178

Cited by 38 publications

(22 citation statements)

References 56 publications

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“…Thus, it was not possible to extract the cathodic Tafel slopes by linear extrapolation to E corr [29]. This behavior is similar to that obtained by other authors who studied the corrosion and corrosion inhibition of α-brass in H 2 SO 4 solutions [30][31][32]. At a more negative potential, an apparent increase of current density was observed which is probably due to hydrogen evolution [29].…”

Section: Potentiodynamic Polarizationsupporting

confidence: 74%

“…For steels, the C dl values decrease with increase in inhibitor concentration due to either the decrease in dielectric constant or increase in the surface film thickness [24]. Obviously, this is not always the case for brass alloys [32]. As observed in the present work, it seems that there is no close correlation between inhibitor concentrations on one hand and dielectric constant and surface film thickness values on the other.…”

Section: Potentiodynamic Polarizationcontrasting

confidence: 42%

“…SG and SG/CTAB have a strong inhibition effect on α-brass corrosion. From the Bode diagram, two-time constants were seen, an adsorbed inhibitor layer at higher frequencies and a surface double layer at low frequencies [32]. The equivalent circuit diagram used to fit Nyquist plots is shown in Fig.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

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Effects of Cetyltrimethylammonium bromide on the Corrosion Inhibition of a Lead-free α-Brass by Sodium Gluconate in Sulfuric Acid

Jennane

Touhami

Zehra

et al. 2019

J. Electrochem. Sci. Technol

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The inhibition performance of sodium gluconate (SG), cetyltrimethylammonium bromide (CTAB) and their mixture (SG/ CTAB) on the corrosion behavior of α-brass in 0.5 M H 2 SO 4 solution has been investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), Scanning Electron Microscope with Energy-Dispersive Spectrometer (SEM-EDS), Inductively Coupled Plasma Spectrometry (ICPS) and molecular dynamics (MD) simulation techniques. The results reveal that SG with 5ppm CTAB, noted SG/CTAB, acts as a good corrosion inhibitor and its inhibition efficiency reached 89% after 24 h immersion in sulfuric acid solution, but slightly decreased at higher temperatures. The polarization curves displayed that SG/CTAB acts as a cathodic-kind inhibitor. Electrochemical impedance spectroscopy (EIS) studies revealed that the addition of 5ppm CTAB to different concentrations of SG considerably increases the corrosion resistance of α-brass. The SEM-EDS and ICPS analyses support the experimental results. Further, molecular dynamics (MD) simulations were used to understand the adsorption profiles of SG/CTAB on Cu(111) and Zn(111) surfaces.

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Section: Potentiodynamic Polarizationsupporting

confidence: 74%

Section: Potentiodynamic Polarizationcontrasting

confidence: 42%

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Effects of Cetyltrimethylammonium bromide on the Corrosion Inhibition of a Lead-free α-Brass by Sodium Gluconate in Sulfuric Acid

Jennane

Touhami

Zehra

et al. 2019

J. Electrochem. Sci. Technol

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“…The heterocyclic ring, polar functional groups with N, and the O and S atoms in polymer inhibitors can be absorbed on the metal surface to form complexes with metal ions. As a result, the metal surface can be blanketed and protected from corrosive solutions . However, the poor solubility of most polymeric materials in an aqueous medium has highly limited their applications as corrosion inhibitors.…”

Section: Introductionmentioning

confidence: 99%

Investigation of polyacrylamide containing capsaicin monomer as a novel corrosion inhibitor for mild steel in hydrochloric acid

Sun

2018

Materials & Corrosion

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Polyacrylamide containing capsaicin‐derived monomer P(AM‐MAA‐AMPS‐HDDE‐SA) (PAMAHS) was investigated as a novel green polymer inhibitor for Q235 mild steel at 298 K in 1 M hydrochloric acid solution. Weight loss measurements, electrochemical techniques, and surface investigation methods were conducted to evaluate the inhibition performance and mechanism. The results indicated that the green inhibitor performed well in inhibiting the corrosion of mild steel and that the inhibition efficiency increased with the increase in the PAMAHS concentration. The polarization curves revealed that PAMAHS functions as a mixed‐type inhibitor. The outstanding anticorrosion effects could contribute to the PAMAHS molecule film adsorbed on the metal surface following a Langmuir adsorption isotherm, and the hydrophobic groups played an important role in protecting the metal surfaces from corrosion media.

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“…Zn-Cu (brass) coatings are used for decorative purposes and to protect the substrates from aggressive media, including strong alkaline and acidic environments-environments which result in lifetime and performance reduction [23,24]. Cyanide-based solutions-which are not desirable due to environmental issues-were used as deposition electrolyte for Zn-Cu coatings in industry [25,26].…”

Section: Introductionmentioning

confidence: 99%

Structural and Corrosion Study of Uncoated and Zn-Cu Coated Magnesium-Based Alloy

Hacıibrahimoğlu

Bedır

Yavuz

2016

Metals

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Zn-Cu alloy was deposited onto AZ63 substrate, and the corrosion behaviour of resulting modified electrodes was investigated in 3 wt % NaCl solution in comparison with uncoated AZ63. Electrochemical, structural, and morphological study of the coating is presented. SEM images reveal that the surface morphology of the films is uniformly small spherical grain distributions. The XRD patterns illustrate polycrystalline structure and the formation of peaks corresponding to hexagonal close-packed ε-phase of Zn-Cu with various crystallographic orientations. Cyclic voltammetry was used to determine the potential ranges where the various redox processes occur. Linear sweep voltammetry results illustrate that longer exposure of uncoated AZ63 in NaCl solution produces a greater corrosion potential shift because of the formation of an oxide layer that did not prevent the progression of corrosion attack. The corrosion resistivity of Zn-Cu coated AZ63 is approximately two orders of magnitude greater than that of uncoated AZ63.

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Theoretical and experimental investigations on corrosion control of 65Cu–35Zn brass in nitric acid by two thiophenol derivatives

Cited by 38 publications

References 56 publications

Effects of Cetyltrimethylammonium bromide on the Corrosion Inhibition of a Lead-free α-Brass by Sodium Gluconate in Sulfuric Acid

Effects of Cetyltrimethylammonium bromide on the Corrosion Inhibition of a Lead-free α-Brass by Sodium Gluconate in Sulfuric Acid

Investigation of polyacrylamide containing capsaicin monomer as a novel corrosion inhibitor for mild steel in hydrochloric acid

Structural and Corrosion Study of Uncoated and Zn-Cu Coated Magnesium-Based Alloy

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