Role of environmental particulate matters on corrosion of copper

Saha, D.; Pandya, Achal; Singh, Jitendra Kumar; Paswan, Sharma; Singh, D. K.

doi:10.1016/j.apr.2016.06.007

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…This was proven during the study of over 300-year-old roof tiles from Queen Anne's Summer Palace in Prague and of the surface of a bronze monument to Francis Garnier, Paris [10,11]. In the beginning of an exposure, the layer of cuprous oxide (Cu 2 O), called cuprite, appears on a surface of the copper object [12]. A thin layer forms, even under dry conditions, by direct oxidation [13].…”

Section: Of 18mentioning

confidence: 97%

“…This layer changes the colour of copper to brown and dark brown. The thickness of this layer is 5-10 µm [1,8,[12][13][14]. The mechanism of the formation of cuprite is according to Equations (1) and (2).…”

Section: Of 18mentioning

confidence: 99%

“…Posnjakite, strangbergite and langite are precursors and they can transform to the more stable phases brochantite and antlerite. Copper ions with chlorides can form nantokite (CuCl) instead of cuprite and subsequently form atacamite (Cu 2 Cl(OH) 3 ) [12][13][14][16][17][18]. The main components of outdoor patinas are cuprite, brochantite, antlerite, posnjakite and atacamite [4,13,18].…”

Section: Of 18mentioning

confidence: 99%

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Artificial Patination of Copper and Copper Alloys in Wet Atmosphere with Increased Content of SO2

et al. 2019

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Natural copper patina is usually formed over several decades. This work investigates the possibility of obtaining a stable artificial patina based on brochantite in a more reasonable time. The patination process was based on patina formation from a humid atmosphere containing sulphur dioxide. The studied parameters were humidity (condensation and condensation/drying), sulphur dioxide concentration (4.4–44.3 g·m−3) and surface pre-treatments (grinding, pre-oxidation and pre-patination) prior to the patination process. Samples were evaluated by mass change, digital image analysis, spectrophotometry, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). A resistometric method was employed in order to observe the patina formation continuously during the exposure. Conditions inside the chamber were monitored during the exposure (pH of water and concentration of SO2 in gaseous phase). According to XRD, it was possible to deliberately grow a brochantite patina of reasonable thickness (approx. 30 µm), even within a couple of days of exposure. The drying phase of the condensation cycle increased the homogeneity of the deposited patina. Formation kinetics were the fastest under a condensation/drying cycle, starting with 17.7 g·m−3 sulphur dioxide and decreasing dosing in the cycle, with an electrolyte pH close to 3. The higher sulphur dioxide content above 17.7 g·m−3 forms too aggressive a surface electrolyte, which led to the dissolution of the brochantite. The pre-oxidation of copper surface resulted in a significant improvement of patina homogeneity on the surface.

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Section: Of 18mentioning

confidence: 97%

Section: Of 18mentioning

confidence: 99%

Section: Of 18mentioning

confidence: 99%

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Artificial Patination of Copper and Copper Alloys in Wet Atmosphere with Increased Content of SO2

et al. 2019

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“…1 However, copper suffers from corrosion damage due to chlorides, sulphides, particulates and microorganisms in its environment. [2][3][4][5] Coating copper with another kind of metal can improve its conductivity and welding properties. Coating copper with tin by using hot air solder levelling, as was performed in this study, is widely applied in the fabrication of commercial electronic devices because of the low cost, good solderability, and reliability of tin.…”

Section: Introductionmentioning

confidence: 99%

The influence of Bacillus subtilis on tin-coated copper in an aqueous environment

et al. 2018

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“…Lin [7] and Hodgkiess [8] studied the corrosion behavior of copper material in seawater environments. Saha [9] studied the corrosion mechanism of copper material exposed in the atmosphere, and Sun [10] studied the stress corrosion of pipelines in seawater environments. Ossai [11] and Velazquez [12] studied the process of pipeline failure under corrosion environments.…”

Section: Introductionmentioning

confidence: 99%

A Time-Variant Reliability Model for Copper Bending Pipe under Seawater-Active Corrosion Based on the Stochastic Degradation Process

Sun

Liao

et al. 2018

Materials

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In the degradation process, the randomness and multiplicity of variables are difficult to describe by mathematical models. However, they are common in engineering and cannot be neglected, so it is necessary to study this issue in depth. In this paper, the copper bending pipe in seawater piping systems is taken as the analysis object, and the time-variant reliability is calculated by solving the interference of limit strength and maximum stress. We did degradation experiments and tensile experiments on copper material, and obtained the limit strength at each time. In addition, degradation experiments on copper bending pipe were done and the thickness at each time has been obtained, then the response of maximum stress was calculated by simulation. Further, with the help of one kind of Monte Carlo method we propose, the time-variant reliability of copper bending pipe was calculated based on the stochastic degradation process and interference theory. Compared with traditional methods and verified by maintenance records, the results show that the time-variant reliability model based on the stochastic degradation process proposed in this paper has better applicability in the reliability analysis, and it can be more convenient and accurate to predict the replacement cycle of copper bending pipe under seawater-active corrosion.

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Role of environmental particulate matters on corrosion of copper

Cited by 12 publications

References 14 publications

Artificial Patination of Copper and Copper Alloys in Wet Atmosphere with Increased Content of SO2

Artificial Patination of Copper and Copper Alloys in Wet Atmosphere with Increased Content of SO2

The influence of Bacillus subtilis on tin-coated copper in an aqueous environment

A Time-Variant Reliability Model for Copper Bending Pipe under Seawater-Active Corrosion Based on the Stochastic Degradation Process

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