Atmospheric Corrosion of Copper Exposed in a Simulated Coastal-Industrial Atmosphere

Pan, Chen; Lv, Wangyan; Wang, Zhenyao; Wei, Su; Wang, Chuan; Liu, Shinian

doi:10.1016/j.jmst.2016.03.024

Cited by 59 publications

(14 citation statements)

References 30 publications

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“…Whilst notable peaks for copper, 44, 50 and 74 • 2θ, are consistent, the less intense peaks at lower 2θ values are of specific interest. The small peaks at 36 and 38 • may indicate that Cu 2 (OH) 3 Cl or Cu 2 O is formed on the surface [20], consistent with the previous elemental analysis. Additionally, changes to the nature of the copper crystallinity are suggested as a function of changing peak ratios amongst the three most prominent peaks.…”

Section: Investigation Of the Corrosion Mechanismsupporting

confidence: 89%

A 13.56 MHz Inductive Power Transfer System Operating with Corroded Coils

Skountzos

Arteaga

Hadjittofis

et al. 2019

2019 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW)

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This paper describes experiments which investigate the effects resulting from corrosion of air-core coils for high frequency inductive power transfer (HF-IPT). A group of coils were treated by exposing them to corrosive conditions for thirty days. Afterwards, the coils were measured with an impedance analyser and the coil with the lowest Q-factor was selected for further experiments. The treated coil was tested at the transmit side of a HF-IPT system, where the system DC-to-DC efficiency was measured and compared against an equivalent system using an untreated transmit coil. The total losses measured increased when the system was operating with the treated coil across a broad loading range, and thermal images were used to establish the additional losses on the treated coil. Analysis of the treated coil identified widespread damage to the surface of the coil. However, it was specific aggressive corrosion only found locally which was able to significantly reduce the Q-factor of the treated coil by 20%.

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Section: Investigation Of the Corrosion Mechanismsupporting

confidence: 89%

A 13.56 MHz Inductive Power Transfer System Operating with Corroded Coils

Skountzos

Arteaga

Hadjittofis

et al. 2019

2019 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW)

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“…The Nyquist plots related to the green and black surfaces before cleaning and after cleaning without protective coating are characterised by the presence of one open depressed semicircle (Fig. 8c), in accordance with the data already reported for bronze surfaces with stable and compact patinas, and without any protective coating with relevant effectiveness [30,36,37]. The Nyquist plot recorded on the same areas after the application of the protective coating is instead clearly characterised by the presence of two capacitive semicircles (Fig.…”

Section: Type Of Cloth or Sponge For Lpr And Eis Measurementssupporting

confidence: 88%

Optimisation of the setup of LPR and EIS measurements for the onsite, non-invasive study of metallic artefacts

Petiti

Gulotta

Mariani³

et al. 2020

J Solid State Electrochem

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Electrochemical techniques have been successfully applied in the past as non-destructive techniques to the cultural heritage field. In particular, linear polarisation resistance (LPR) and electrochemical impedance spectroscopy (EIS) have been employed for the onsite monitoring of corrosion on metallic works of art, providing valuable results. Such techniques have been successfully adapted from the industrial field for this particular kind of application, but a systematic evaluation of the influence of all experimental settings on the obtained results is still lacking: several factors and parameters can affect the results, and it is important to properly consider their influence for a reliable interpretation of data. Therefore, in this work, the influence of a series of experimental parameters was evaluated in order to obtain a reliable and time-effective setup by performing a series of tests on a bronze artefact. Several variables were considered, with particular attention to those affecting the reproducibility and reliability of the measurements, as well as the duration of each single acquisition. It was demonstrated, in fact, that an optimised experimental setup from the point of view of the duration could improve also reproducibility and reliability of the measurements. The optimised protocol was then adopted in the framework of a diagnostic campaign of the Monumento ai Caduti (War Memorial) of Lecco (IT)

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“…It was confirmed that the chloride ions act in the formation of cuprous oxide and they were responsible for the localized attack. Moreover, Pan et al [71] demonstrated that double-layered corrosion product was formed in chloride solutions comprising inner cuprous oxide and outer layer composed of more chloride. Accordingly, it is observed from the EDX spectra as a point scan from SEM studies (Fig.…”

Section: Interfacial Ion Transport Process and Delamination Kineticsmentioning

confidence: 99%

Exploring water and ion transport process at silicone/copper interfaces using in-situ electrochemical and Kelvin probe approaches

Munirathinam

Dam

Herrmann

et al. 2021

Journal of Materials Science & Technology

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In general, packaging materials which encapsulate light emitting diodes (LEDs) and microelectronic devices offer barrier protection against several environmental hazards such as water and ionic contaminants. However, these encapsulants may provide pathways for water and ionic contaminants to reach the metal/polymer interfaces and provoke local corrosion of electronics, which is a major reliability concern for polymer encapsulated LEDs and microelectronics. As the water and corrosive constituents play a crucial role in their reliability, water uptake kinetics, interfacial ion transport and delamination behaviour of silicone coated copper model system, mimicking a typical microelectronics packaging system, is explored in the present work. Electrochemical impedance spectroscopy (EIS) integrated with attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy studies revealed that water diffusion inside the silicone network is Fickian in nature and the evolution of the observed time constants are related to the diffusion and interfacial reactions. A decrease of impedance magnitude with time was observed in EIS measurements concurrently with water absorption bands shifting towards lower wavenumber in ATR-FTIR measurements, implying the growth of strong hydrogen bonding between water molecules and the silicone network. The estimated diffusion constant of water using the capacitance method was in the order of 7 × 10 -12 m 2 s −1 and the water absorption volume fraction was in the range of 0% to 0.30%. Scanning Kelvin probe studies elucidated the ion transport process occurring at the silicone/copper interface in a humid atmosphere. The interfacial ion transport process is controlled by the interfacial electrochemical reactions at the cathodic delamination front and the estimated average delamination rate is 0.43 mm h -1/2 . This work demonstrates that exploring ion and water transport in the silicone coating and along the silicone/copper interface is of pivotal importance as part of a detailed reliability assessment of the polymer encapsulated LEDs and microelectronics.

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Atmospheric Corrosion of Copper Exposed in a Simulated Coastal-Industrial Atmosphere

Cited by 59 publications

References 30 publications

A 13.56 MHz Inductive Power Transfer System Operating with Corroded Coils

A 13.56 MHz Inductive Power Transfer System Operating with Corroded Coils

Optimisation of the setup of LPR and EIS measurements for the onsite, non-invasive study of metallic artefacts

Exploring water and ion transport process at silicone/copper interfaces using in-situ electrochemical and Kelvin probe approaches

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