Electrochemical aspects of copper atmospheric corrosion in the presence of sodium chloride

Schindelholz, Eric John; Cong, Hongbo; Jové-Colón, Carlos F.; Li, Shengxi; Ohlhausen, James Anthony; Moffat, Harry K.

doi:10.1016/j.electacta.2018.04.184

Cited by 52 publications

(35 citation statements)

References 55 publications

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“…7,8 However, in aqueous environments containing anions such as chloride or sulfate, the probability of formation of a passive oxide film is low. 9,10 Corrosion inhibitors, divided into inorganic and organic inhibitors, reduce the rate of corrosion and degradation. 11 A great deal of attention has been devoted in the last decades to copper corrosion and protection by selecting appropriate non-toxic and eco-friendly corrosion inhibitors in order to minimize corrosion-related damages.…”

Section: Introductionmentioning

confidence: 99%

Study Of Mercaptobenzimidazoles As Inhibitors For Copper Corrosion: Down to the Molecular Scale

Neupane

Losada-Pérez

Tiringer

et al. 2021

J. Electrochem. Soc.

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The initiation of a corrosion process can be triggered by defects in the spatial distribution and molecular organization in the adsorbed layer of surfactant inhibitors. A detailed knowledge of the intermolecular forces between the inhibitor molecules and the interfacial bonding between the molecules and metal (oxide) surface will be decisive to unravel the mechanisms driving the initiation of corrosion and surface protection. In this work, adsorbed organic layers of two mercapto-based benzimidazole molecules, 5-methoxy-2-mercapto-benzimidazole (SH-BimH-5OMe) and 5-amino-2mercapto-benzimidazole (SH-BimH-5NH2) were studied regarding their inhibition performance of copper corrosion. Atomic force microscopy was used to address the stability and intermolecular forces of the self-assembled monolayers, using imaging and force measurement modes. For a film formed by amino derivative molecules, molecular fishing by a gold coated AFM tip frequently occurred. For molecular layers of the methoxy derivative, no fishing events were observed, indicating the formation of a constant functional performance layers. X-ray photoelectron spectroscopy revealed that SH-BimH-5OMe molecules form a stronger surface bond strength/interfacial bonding SAM layers on Cu surfaces as compared to SH-BimH-5NH2 molecules. Results of computational DFT modelling and electrochemical corrosion tests are in line with the AFM and XPS results.

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Section: Introductionmentioning

confidence: 99%

Study Of Mercaptobenzimidazoles As Inhibitors For Copper Corrosion: Down to the Molecular Scale

Neupane

Losada-Pérez

Tiringer

et al. 2021

J. Electrochem. Soc.

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“…The corrosion parameters measured from Tafel curves for base-material and after modification of Al-bronze samples are presented in Table 5 commonly with a higher value of E corr and lower level of i corr showed improvement in corrosion resistance properties. Moreover, to measure the corrosion protection of modified surface, the values of R p were calculated from Tafel constants anodic, b a and cathodic, b c values through Stern-Geary equation 20 , as follows:After R p values have been defined, the efficiency of corrosion protection from modified surface ( η EF ) in percentage unit can be calculated against the base-material Al-bronze according to the expression (5) 21 :Both results in Fig. 7 and Table 5 demonstrated that the higher value of E corr and lower value of i corr were the Al-bronze sample after the surface modification to the Al-bronze substrate.…”

Section: Resultsmentioning

confidence: 99%

From waste to surface modification of aluminum bronze using selective surface diffusion process

Singla

Kumar

Pahlevani

et al. 2019

Sci Rep

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When corrosion is the dominant failure factor in industrial application and at the same time high mechanical properties are required, aluminum bronze is one of the best candidates. Hence, there is a continuous quest for increasing the lifetime of aluminum bronze alloys through enhancing the abrasion and corrosion resistance. Existing methods are based on modifying the bulk properties of alloy or surface modification which required sophisticated equipment and process control. This approach has limited application for advanced components because of high price and difficulty to apply. In this research, we developed an innovative approach to enhance the corrosion and abrasion resistance of aluminum bronze through selective surface diffusion process. In this process, we have used waste materials as input and the modified surface has formed in a single and green process. New surface structure consists of finely dispersed kappa phase (χ ) in uniform alpha (α) solid solution matrix. Results have demonstrated that this uniform diffused modified surface layer has improved hardness of the base material and both corrosion and abrasion resistance has increased. This novel surface modification technique has opened a pathway for using waste materials as input for surface modification of aluminum bronze to meet the needs of industrial applications in a cost effective and environmentally friendly way.

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“…Also, it shows Raman pattern of malachite corrosion and its micrograph in the internal corrosion layer through the metallic structure of the chisel E. Malachite shows a very intensive strong band at the wavenumber 271 cm −1 which is represented its finger print, in addition its actualization in other secondary bands at the wavenumbers 144, 340, 545, 811 and 1052 cm −1 (Zhang et al 2014;Inberg et al 2018, Łukasz Ciupiński, 2010, Frost R L. 2002Daniel Cosano 2018). While, atacamite exhibits strong Raman bands at wavenumbers 511, 3460, 3320 cm -1, in addition its actualization at the wavenumbers 820, 890 and 985 cm −1 (Frost et al 2002;Frost 2003;Bertolotti 2012;Ropret 2012;Schindelholz 2018). This is besides its matching with the equipment library standard as shown in the Figure 7-b.…”

Section: -Raman Spectroscopymentioning

confidence: 98%

Ge-conservación Nº19

Revista¹

2021

GEC

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Electrochemical aspects of copper atmospheric corrosion in the presence of sodium chloride

Cited by 52 publications

References 55 publications

Study Of Mercaptobenzimidazoles As Inhibitors For Copper Corrosion: Down to the Molecular Scale

Study Of Mercaptobenzimidazoles As Inhibitors For Copper Corrosion: Down to the Molecular Scale

From waste to surface modification of aluminum bronze using selective surface diffusion process

Ge-conservación Nº19

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