Corrosion study of brazing Cu Ag alloy in the presence of benzotriazole inhibitor

Rahmani, Hooman; Meletis, Efstathios I.

doi:10.1016/j.apsusc.2019.143759

Cited by 26 publications

(6 citation statements)

References 44 publications

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“…In order to enhance the protection properties, the addition of a corrosion inhibitor was decided. Although a recent work reported that benzotriazole's protective efficacy on silver surfaces is unsatisfactory [25], at the present BTA it is still the most appreciated inhibitor used to passivate Ag-based alloys, and for this reason it was selected in our study [26]. When dealing with corrosion inhibitors, and in particular benzotriazole, a tricky issue is the environmental and health risk.…”

Section: Resultsmentioning

confidence: 99%

Toward a Green and Sustainable Silver Conservation: Development and Validation of Chitosan-Based Protective Coatings

Boccaccini

Giuliani

Pascucci

et al. 2022

IJMS

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When exposed to air, silver artifacts undergo an unpleasant darkening and shiny loss, commonly known as tarnishing. At the present, the development of protective coatings by using eco-friendly and biocompatible materials, able to ensure high transparency and to hinder the degradation of silver objects, remains a huge challenge. In this study, chitosan was used for the first time to realize sustainable coatings for silver protection. Both pure and benzotriazole-containing chitosan coatings were prepared and applied on sterling silver disks. A commercial product based on acrylic resin was used as a reference. The aesthetic features and protective properties of these coatings were evaluated by performing two different types of aging treatments. In particular, the assessment of the protective efficacy was carried out by reproducing both highly aggressive polluted environments and real-like museums’ storage conditions. In the first case, chitosan-based coatings with benzotriazole performed better, whereas in storage conditions all the chitosan films showed comparable efficacy. Compositional, morphological and structural analyses were used to evaluate the protective properties of the coatings and to detect any physical or chemical modifications after the aging treatments. Our findings reveal that the two different testing methods provide complementary information. Moreover, chitosan coatings can achieve protective efficacy comparable with that of the commercial product but using non-toxic solvents and a renewable biopolymer. Chitosan coatings, designed for cultural heritage conservation, are thus promising for the protection of common sterling silver objects.

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Section: Resultsmentioning

confidence: 99%

Toward a Green and Sustainable Silver Conservation: Development and Validation of Chitosan-Based Protective Coatings

Boccaccini

Giuliani

Pascucci

et al. 2022

IJMS

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“…Moreover, BTA has the ability to form poorly water-soluble complexes with cations of many metals (Ag, Cu, Zn, Ni, and Fe). The complexes hence form a thin protective layer, which can inhibit metal corrosion. ,, …”

Section: Resultsmentioning

confidence: 99%

“…The complexes hence form a thin protective layer, which can inhibit metal corrosion. 65,67,68 After 21 days of immersion, copper coated with C361 was the only one without formation of a layer of corrosion product, while fluorescence emission at the scratched area was preserved. The latter phenomenon was attributed to the fact that the dye was covalently bonded to the SiO 2 NCs so that they did not leach and diffuse to other areas.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Design of Nanostructured Protective Coatings with a Sensing Function

Salaluk

Jiang

Viyanit

et al. 2021

ACS Appl. Mater. Interfaces

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Nanostructured multilayered coatings for metals are prepared to simultaneously provide a function of corrosion mitigation and of corrosion sensing for copper substrates. Silica nanocapsules, embedded in one layer of the coating, are used as a host for a corrosion inhibitor and as a sensor, which detect changes of pH value and release inhibitors via an optical signal. Furthermore, another layer in the coating exists in a nanonetwork loaded with another corrosion inhibitor, which is impregnated with a hydrophobic polymer. We demonstrate that a specific arrangement of layers leads to an optimum anticorrosion and sensing performance while the sensing signal can be prolonged for a long time. It is the first time that the fluorophore detecting corrosion is conjugated to the nanosensor and that nanofibers and nanocapsules are used simultaneously to load and release corrosion inhibitors for anticorrosion applications.

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“…7b. the n1s bond energy of BaTH emerges at 399.3 ev [43]. For sample b, there are two peaks for n 1s signal in high resolution spectrum.…”

Section: Inhibition Mechanism Studymentioning

confidence: 88%

“…7a. The three components of Cu 2p 3/2 for sample "a" indicate the layer obtained from BaTH contains metallic Cu at 932.7 ev [43,44], Cu 2 O at 932.4 ev [16,43], and the Cu-BTa organometallic complex at 933.3 ev [16,29]. The Cu 2p 3/2 spectrum of sample "b" is similar to that of sample "a", indicating QaC Hyamine 1622 can also be adsorbed on the Cu surface and form a layer with Cu.…”

Section: Inhibition Mechanism Studymentioning

confidence: 99%

Copper Corrosion inhibition by a Quaternary Ammonium Salt-assisted Benzotriazole

Wan,

Li,

Xing

2023

Archives of Metallurgy and Materials

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Quaternary ammonium salt (QaS) Hyamine 1622 and benzotriazole (BTaH) were used to form a protective layer on copper surface to resist the corrosion by immersing the copper into the inhibitors-containing solutions. The inhibitor's anticorrosion properties are studied in neutral 3.5 wt.% naCl medium by anodic polarization, Tafel polarization, electrochemical impedance spectroscopy (EiS) and OCP exposure. The surface characterization is analyzed by Contact angle(Ca) measurement, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy(SEM). The electrochemical tests show that they can act as single inhibitor to form a passive layer to resist Cu corrosion, and the anticorrosion properties of Cu can be improved by using binary Hyamine 1622/BTaH inhibitors. XPS results indicate that both BaTH and Hyamine 1622 molecule can be chemisorbed onto the copper surface and make complex films with Cu species. Ca measurement revealed the enhancement of hydrophobicity by combining QSa with BTaH. OCP exposure in neutral medium for 72 h evidently reveals that the passive layer formed by binary inhibitors decreases the pit corrosion. Better hydrophobic nature and more compact passive layer give rise to excellent inhibition properties of binary inhibitors.

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Corrosion study of brazing Cu Ag alloy in the presence of benzotriazole inhibitor

Cited by 26 publications

References 44 publications

Toward a Green and Sustainable Silver Conservation: Development and Validation of Chitosan-Based Protective Coatings

Toward a Green and Sustainable Silver Conservation: Development and Validation of Chitosan-Based Protective Coatings

Design of Nanostructured Protective Coatings with a Sensing Function

Copper Corrosion inhibition by a Quaternary Ammonium Salt-assisted Benzotriazole

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