Quantitative In Situ Analysis of Initial Atmospheric Corrosion of Copper Induced by Acetic Acid

Gil, Harveth; Leygraf, Christofer

doi:10.1149/1.2715315

Cited by 47 publications

(49 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…31 This observation is consistent with a detailed quantitative study of the initial atmospheric corrosion of copper exposed to humid air and formic acid by Gil and Leygraf. 26 Using the same quantification of IRAS absorbances as in, 2 where the IRAS intensity was correlated to the mass observed by the quartz crystal microbalance (QCM), the intensity of the Cu 2 O peak shown in Figure 1 corresponds to around 15 nm of Cu 2 O. The difference in wavenumber between the antisymmetric and symmetric stretching vibrations of the formate is in agreement with data reported by Gomes et al based on the DFT calculations and suggests that the formate binds to the copper on bridging sites.…”

Section: Resultsmentioning

confidence: 99%

Alkanethiols as Inhibitors for the Atmospheric Corrosion of Copper Induced by Formic Acid: Effect of Chain Length

Hosseinpour

Johnson

Leygraf

2013

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Self assembled monolayers (SAMs) of n-alkanethiols of different chain length (4,6,8,12, and 18 carbons in the chain) have been explored as corrosion inhibitors for copper exposed to humidified air containing formic acid, an environment used to mimic accelerated indoor atmospheric corrosion. Near-surface sensitive in-situ infrared reflection/absorption spectroscopy combined with interface sensitive vibrational sum frequency spectroscopy revealed unique molecular information on the role of each SAM during ongoing corrosion. All SAMs protect copper against corrosion, and this ability increases continuously with chain length. Their structural order is high prior to exposure, but an increased disorder is observed as a result of the corrosion process. The protection ability of the SAMs is attributed to a selective hindrance of the corrosion stimulators water, oxygen gas, and formic acid to reach the copper-SAM interface through each SAM, which results in different corrosion mechanisms on SAM protected copper and unprotected copper. This significantly retards the formation of the corrosion products copper hydroxide and copper formate, and results in essentially no formation of cuprite.

show abstract

Section: Resultsmentioning

confidence: 99%

Alkanethiols as Inhibitors for the Atmospheric Corrosion of Copper Induced by Formic Acid: Effect of Chain Length

Hosseinpour

Johnson

Leygraf

2013

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is in agreement with experimental results where the hydrated form of the carboxylate was considered more likely to be formed in a low pollutant atmosphere (120 ppb). 10,11 The constants for surface dissolution reactions were chosen to have the same value as in previous estimations for copper in SO 2 environment. 9 But both parameters were varied in order to investigate their influence in the corrosion process.…”

Section: Methodsmentioning

confidence: 99%

GILDES Model Simulations of the Atmospheric Corrosion of Copper Induced by Low Concentrations of Carboxylic Acids

Gil

Leygraf

Tidblad

2011

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

A computer simulation with a GILDES-based model using the COMSOL multiphysics software was performed for copper exposed to low concentrations of carboxylic acids in humidified air at room temperature. GILDES is a six-regime computer model (Gas, the Interface between gas and liquid, the Liquid, the Deposition layer, the Electrodic region near the surface and the Solid). The simulations were compared to previously published in-situ results for copper at the same conditions analysed by a quartz crystal microbalance (QCM) and infrared reflection absorption spectroscopy (IRAS). Experimental and calculated results agree with each other with respect to the effect of corrosion, showing formic acid as the most aggressive followed by acetic and propionic acid. This is supported by a higher ligand-and proton-promoted dissolution found in formic acid exposures, followed by acetic and propionic exposures. Atmospheric corrosion models are an important tool for the society. By aiding in proper material selection they can improve the functionality and safety of the different structures as well as electronic devices exposed to the atmosphere at different climatic conditions. Models of corrosion have traditionally been developed based on statistical analyses of field data by applying simple physical/chemical arguments, for example by separating the effect of dry and wet deposition into individual additive terms.1 The corrosion rate is usually correlated to measured environmental factors. These classification schemes have a limited accuracy, one reason being the effect of micro-climate, which means that corrosion rates can vary dramatically between locations that are only meters apart.2 However, examples of models based on first principles are starting to emerge. Spence and Haynie 3 and Lyon et al. 4 studied the processes of oxide dissolution and formation, and the electrochemical processes within a droplet on a metal surface. Cole et al.5 evaluated the deposition of gases and aerosols both inside and outside museums and the resulting effects on corrosion of cultural objects using a holistic model. The study shows the relative importance of different deposition mechanisms within a building, such as gravity, vortex shedding and, in the case of significant air flows, momentumdominated impact. Díaz and López 6 developed a deterministic model for the damage function of carbon steel expressed in terms of corrosion penetration as a function of environmental variables using an Artificial Neural Network (ANN) to fit the data. Cole et al.7 describe a multiscale (from global to micron) model for the prediction of atmospheric corrosion of zinc. The model is able to predict corrosion rates of metal components to enable appropriate material selection and to determine how microstructure and oxide development influence corrosion rates. Farrow et al. 8 in 1996, applied the mentioned GILDES model to perform the first theoretical mechanistic study of the atmospheric corrosion of zinc in a controlled environment. The results show that, under such co...

show abstract

“…The corrosion of copper in organic acids has a complex reaction mechanism which has been studied mainly in atmospheric conditions. 80,81 Figure 11 exhibits the main reactions that could take part in the corrosion of copper exposed to carboxyl acids.…”

Section: Metallic Corrosion Mechanisms and The Formation Of Corrosionmentioning

confidence: 99%

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

141

View full text Add to dashboard Cite

O objetivo deste artigo é analisar as principais questões com relação às estabilidades oxidativa e de armazenamento de biodiesel e como elas afetam diferentes materiais metálicos e poliméricos presentes em peças de automóvel e em estruturas de armazenamento de biodiesel. Adicionalmente, este trabalho apresenta uma revisão das técnicas para a medição da estabilidade oxidativa e para avaliação da degradação de materiais metálicos e poliméricos. Quando biodiesel é oxidado, ocorre uma série de mudanças nas suas propriedades, tais mudanças afetam não só a qualidade do biodiesel, mas também as propriedades dos materiais que estão em contato com o biodiesel. Com a oxidação, propriedades do biodiesel como o índice de acidez, índice de peróxidos e viscosidade aumentam, entretanto os índices de iodo e teor de ésteres metílicos diminuem. As alterações das propriedades químicas e físicas do biodiesel podem afetar a integridade e a estabilidade dos materiais que estão em contato com o combustível. A atual situação relacionada com a estabilidade dos materiais revistos neste artigo poderia limitar o uso extensivo de biodiesel, como tem sido proposto em vários países, e deveria ser considerada como um fenômeno de grande importância na tecnologia de biodiesel.The purpose of this paper is to analyze the main issues concerned with the oxidative and storage stabilities of biodiesel and how they affect different metallic and polymeric materials present in automotive parts and in biodiesel storage structures. In addition, this work presents a review of the techniques used for measuring the oxidative stability and for evaluating the degradation of metallic and polymeric materials. When biodiesel is oxidized, a series of changes in its properties occurs. These changes not only affect biodiesel quality, but also the properties of the materials that are in contact with it. Upon oxidation, biodiesel properties like the acid value, peroxide value and viscosity increase, while the iodine value and the content of methyl esters decrease. The changes in the chemical and physical properties of biodiesel can affect the integrity and stability of the material. The situation reviewed in this paper, which talks about the stability of materials, could limit the extensive use of biodiesel. Such measures have been proposed in several countries, and it is a topic of great importance for biodiesel technology.

show abstract

Quantitative In Situ Analysis of Initial Atmospheric Corrosion of Copper Induced by Acetic Acid

Cited by 47 publications

References 22 publications

Alkanethiols as Inhibitors for the Atmospheric Corrosion of Copper Induced by Formic Acid: Effect of Chain Length

Alkanethiols as Inhibitors for the Atmospheric Corrosion of Copper Induced by Formic Acid: Effect of Chain Length

GILDES Model Simulations of the Atmospheric Corrosion of Copper Induced by Low Concentrations of Carboxylic Acids

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Contact Info

Product

Resources

About