Some aspects of the role of inhibitors in the corrosion of copper in tap water as observed by cyclic voltammetry

Bi, Huichao; Burstein, G.T.; Rodriguez, Belén Bello; Kawaley, G.

doi:10.1016/j.corsci.2015.11.005

Cited by 62 publications

(21 citation statements)

References 31 publications

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“…On the other hand, Nyquist plots of the weld interface and the copper sample show a capacitive loop at high to moderate frequencies. The straight line or Warburg (W) impedance (W is the Warburg diffuse element) at low frequencies can be modeled with the equivalent circuit, as shown in Figure 9 c. It can be concluded that more corrosion products (or corrosion attacks) are formed during immersion, and therefore, charge transfer resistance decreases [ 48 , 49 ]. As was mentioned earlier, the value of n 2 , as a parameter for measuring the roughness of the surface and its heterogeneity, is also influenced by immersion time due to more corrosion attacks.…”

Section: Resultsmentioning

confidence: 99%

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

et al. 2018

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The effect of microstructure on corrosion behavior of a solid-state explosion welded Ti-Cu bimetal is investigated by means of alternating current-direct current (AC-DC) electrochemical measurements, optical microscopy, scanning electron microscopy, and scanning Kelvin probe force microscopy (SKPFM). The results indicate that the titanium regions in the welding interface, local melted zone (LMZ), and LMZ-Cu interface are potential sites for initiation of corrosion attacks. SKPFM mapping clearly shows that before exposure of the sample to a 3.5% NaCl corrosive solution and at the beginning of the exposure, the Cu side of the bimetal has a higher Volta potential in comparison to that of the Ti region, and thus acts as a cathode. Electrochemical measurements also confirm that titanium acts as an anode and copper as a cathode, in the first moments of immersion, in accordance with macroscopic observations and SKPFM results. However, by growing a passive layer of titanium oxide and titanium hydroxide on the Ti side after about 1 h exposure to the corrosive medium, the titanium side becomes nobler and the polarity arrangement in the galvanic couple reverses.

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Section: Resultsmentioning

confidence: 99%

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

et al. 2018

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“…2,4 Different approaches have been considered to minimize the corrosion of copper, [5][6][7] among which the use of organic corrosion inhibitors is by far the one most frequently explored. 4,8 Azoles have been extensively tested as corrosion inhibitors for copper in different solutions [9][10][11][12][13] due to the presence of N-atoms in a fivemembered ring as potential adsorption centers. The azole compounds inhibit the corrosion of copper by adsorbing on the metal surface through the free electron pairs in these atoms.…”

Section: Introductionmentioning

confidence: 99%

The first electrochemical and surface analysis of 2-aminobenzimidazole as a corrosion inhibitor for copper in chloride solution

Xhanari

Finšgar

2017

New J. Chem.

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“…These obstacles can be avoided by using inhibitors, which is quite a common technique to control corrosion of copper and its alloys in water solutions [20][21][22][23]. The protective effect is found in organic compounds containing heteroatoms of nitrogen, sulphur, phosphorus, and oxygen, polar groups, heterocycles, and benzene rings with delocalized π-electrons [24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Corrosion of α-Brass in Solutions Containing Chloride Ions and 3-Mercaptoalkyl-5-amino-1H-1,2,4-triazoles

et al. 2019

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The protective effect of 3-mercaptoalkyl derivatives of 5-amino-1H-1,2,4-triazole against corrosion of α-brass in a chloride media was studied using polarization curves, electrochemical impedance spectroscopy, and full-scale corrosion testing. The brass electrode remains passive up to the activation potential, which is much higher than in solutions without organic additives, and it increases with the concentration of the inhibitor. The protection degree of all the studied inhibitors reaches its maximum of over 99% in solutions with the concentration of the inhibitor Cinh ≥ 0.10 mM. The protective effect increases with the length of the alkyl chain. All the studied derivatives are effective against atmospheric corrosion of α-brass. A protective film is formed on the brass surface, and it most probably includes oxides as well as complex compounds of zinc and copper with the molecules of the inhibitors. The impedance spectroscopy demonstrated that the presence of the inhibitor results in a decrease in the double-layer capacitance and an increase in the polarization resistance, which proves that the protective film actually forms on the brass surface. The quantum chemical analysis of the optimized molecular structures demonstrates that all the studied inhibitors should have a similar protective effect, which agrees with the experimental results.

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Some aspects of the role of inhibitors in the corrosion of copper in tap water as observed by cyclic voltammetry

Cited by 62 publications

References 31 publications

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

The first electrochemical and surface analysis of 2-aminobenzimidazole as a corrosion inhibitor for copper in chloride solution

Corrosion of α-Brass in Solutions Containing Chloride Ions and 3-Mercaptoalkyl-5-amino-1H-1,2,4-triazoles

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