Adsorption of Benzotriazole on the Surface of Copper Alloys Studied by SECM and XPS

Mansikkamäki, Kirsi; Haapanen, Ulla; Johans, Christoffer; Kontturi, Kyösti; Valden, M.

doi:10.1149/1.2208912

Cited by 64 publications

(25 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4. Each etched (Mansikkamäki et al 2006;Ghodselahi et al 2008;Luo et al 2015). It has been confirmed by some works performing Auger spectroscopy that the binding energy of Cu 0 -Cu 0 is higher than that of Cu ?…”

Section: Resultsmentioning

confidence: 81%

Metal–metal bonding using silver/copper nanoparticles

et al. 2015

View full text Add to dashboard Cite

A method for producing nanoparticles composed of silver and copper and a metal-metal bonding technique using the silver/copper nanoparticles are proposed. The method consists of three steps. First, copper oxide nanoparticles are produced by mixing Cu(NO 3 ) 2 aqueous solution and NaOH aqueous solution. Second, copper metal nanoparticles are fabricated by reducing the copper oxide nanoparticles with hydrazine in the presence of poly(vinylpyrrolidone) (PVP). Third, silver/copper nanoparticles are synthesized by reducing Ag ? ions with hydrazine in the presence of the copper metal nanoparticles. Initial concentrations in the final silver/copper particle colloid, composed of 0.0075 M Cu 2? , 0.0025 M Ag ? , 1.0 g/L PVP, and 0.6 M hydrazine, produced silver/copper nanoparticles with an average size of 49 nm and a crystal size of 16.8 nm. Discs of copper metal were successfully bonded by the silver/copper nanoparticles under annealing at 400°C and pressurizing at 1.2 MPa for 5 min in not only hydrogen gas but also nitrogen gas. The shear force required to separate the bonded discs was 22.3 MPa for the hydrogen gas annealing and 14.9 MPa for the nitrogen gas annealing (namely, 66.8 % of that for hydrogen gas annealing).

show abstract

Section: Resultsmentioning

confidence: 81%

Metal–metal bonding using silver/copper nanoparticles

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Therefore, the surface of the sensing microelectrode is sensitive to modification by the benzotriazole molecule, and the reported changes in the faradaic currents measured at the Pt tip cannot be exclusively attributed to variations in the tip-substrate distance and the chemical state of the copper substrate, hindering the SECM to be employed to monitor the Cu-BTAH films when the benzotriazole molecule is present in the electrolyte ("in situ tests"), and it would require to search for a different electrode material that would show no interaction with BTAH for the fabrication of the SECM tip. Since this feature is less notorious for the samples immersed in the Na 2 SO 4 base electrolyte, it may have passed unnoticed in previous investigations from another laboratory [58][59][60]. Nevertheless, the interaction between platinum and benzotriazole cannot be neglected from the observations gathered during this work.…”

Section: Time (Min)mentioning

confidence: 72%

“…The system copper/benzotriazole was chosen as an example of interface inhibition. Recently, Kontturi and coworkers have reported some investigations of this model metal-inhibitor system with the SECM operating in the feedback mode [58][59][60], and information regarding the kinetics of film formation and on the effects of oxygen contents in the environment and of copper polarization in the inhibitive effect of benzotriazole. In those investigations, Z-approach curves were employed exclusively, and ferrocene-methanol had to be added to the electrolyte to serve as redox mediator at the ultramicroelectrode tip.…”

Section: Introductionmentioning

confidence: 99%

Uses of scanning electrochemical microscopy for the characterization of thin inhibitor films on reactive metals: The protection of copper surfaces by benzotriazole

Izquierdo

Santana

González

2010

Electrochimica Acta

View full text Add to dashboard Cite

a b s t r a c tScanning electrochemical microscopy (SECM) was used to study the film formation of benzotriazole towards corrosion of copper. SECM was operated in the feedback mode by using ferrocene-methanol as redox mediator, and the sample was left unbiased at all times to freely attain its open circuit potential in the test environment. Following exposure to aggressive electrolytes the anticorrosion abilities of the layers were characterized by image analysis and by an electrochemical method derived from the experimental approach curves. Changes in the shape of the approach curves were clearly observed during the inhibitor film formation process. They showed the transition from an active conducting behaviour towards ferrocinium reoxidation typical of unprotected copper, to a surface exhibiting insulating characteristics when the metal was covered by a surface film containing the inhibitor. This supports that SECM is a practical technique in the investigation of corrosion inhibitor performance. However, a consistent tendency for the characterization of inhibitor film formation using SECM measurements in the positive feedback mode for the copper-benzotriazole system was only found if the experiments were conducted when the inhibitor molecule was not present in the test solution. That is, inhibitor molecules were found to interact not only with the copper surface during the monitoring process, but with the SECM tip as well, this effect being significantly enhanced when chloride ions were present in the electrolyte. Finally, a procedure to image the chemical activity of copper surfaces partially covered with the inhibitor film with SECM is proposed.

show abstract

“…[46][47][48] The only antecedents for such studies employing microelectrochemical scanning techniques are the SECM-based investigations of benzotriazole films using zapproach curves on polarised copper by Mansikkamäki et al, [29][30][31] and on non-polarised copper samples using both z-approach curves and 3D topographic maps of the surface by Izquierdo et al [32] In those studies, however, ferrocene/ methanol had to be added to the test electrolyte to serve as freely diffusing redox mediator, though it might influence the corrosion process on the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Application of AC‐SECM in Corrosion Science: Local Visualisation of Inhibitor Films on Active Metals for Corrosion Protection

Pähler

Santana

Schuhmann

2010

Chemistry A European J

View full text Add to dashboard Cite

The suitability of frequency-dependent alternating-current scanning electrochemical microscopy (4D AC-SECM) for investigation of thin passivating layers covering the surface of corrosion-inhibited metals has been demonstrated. Inhibition of copper corrosion by benzotriazole (BTAH) and methylbenzotriazole (MBTAH), which are effective inhibitors for this metal under many environmental conditions, was investigated. Strong dependencies were found for the AC z-approach curves with both the duration of the inhibitor treatment and the frequency of the AC excitation signal applied in AC-SECM. Both negative and positive feedback behaviours were observed in the AC approach curves for untreated copper and for Cu/BTAH and Cu/MBTAH samples. Negative feedback behaviour occurred in the low-frequency range, whereas a positive feedback effect was observed at higher frequencies. A threshold frequency related to the passage from negative to positive regimes could be determined in each case. The threshold frequency for inhibitor-modified samples was found always to be significantly higher than for the untreated metal, because the inhibitor film provides electrical insulation for the surface. Moreover, the threshold frequency increased with increasing surface coverage by the inhibitor. 4D AC-SECM was successfully applied to visualizing spatially resolved differences in local electrochemical activity between inhibitor-free and inhibitor-covered areas of the sample.

show abstract

Adsorption of Benzotriazole on the Surface of Copper Alloys Studied by SECM and XPS

Cited by 64 publications

References 43 publications

Metal–metal bonding using silver/copper nanoparticles

Metal–metal bonding using silver/copper nanoparticles

Uses of scanning electrochemical microscopy for the characterization of thin inhibitor films on reactive metals: The protection of copper surfaces by benzotriazole

Application of AC‐SECM in Corrosion Science: Local Visualisation of Inhibitor Films on Active Metals for Corrosion Protection

Contact Info

Product

Resources

About