Early stages of copper corrosion behaviour in a Tunisian soil

Souissi, Nabil; Triki, E.

doi:10.1002/maco.200905383

Cited by 9 publications

(10 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the first interval, the corrosion rate was not affected by temperature increase. The non‐Arrhenius behavior was also observed for pure copper in a Tunisian soil and in sodium bromide containing solution . The authors have attributed such observations to an increase of anion aggressiveness, which was counterbalanced by the growth of a thick oxide layer at elevated temperature .…”

Section: Resultsmentioning

confidence: 77%

Early stages of tin bronze corrosion in neutral aqueous chloride media: Electrochemical and FTIR investigations

Aouadi

Souissi

2016

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

The corrosion behavior of tin bronze alloy equivalent to a Punic one was investigated in aqueous 0.5 M chloride electrolyte using potentiodynamic measurements. The electrochemical results showed selective dissolution of the major alloy component reflecting a decuprification process. FTIR characterization of the patina anodic layers showed the presence of various dehydrated and hydrated tin compounds with a few copper species suggesting the patina type I formation on the Cu10Sn bronze alloy. A kinetic model for the Cu10Sn bronze alloy dissolution in the chloride solution was developed. The reaction order with respect to chloride content was determined for the Cl− halide concentration domains. The low order value (about 0.22) was attributed to the Cl− adsorption intermediate step. The high reaction order value (about 2) reflected two determining steps of cuprous chloride complex formation. Two behaviors for the material were evidenced when varying the temperature. The values of the activation energy Ea, activation enthalpy ΔH* and activation entropy ΔS* were calculated and discussed.

show abstract

Section: Resultsmentioning

confidence: 77%

Early stages of tin bronze corrosion in neutral aqueous chloride media: Electrochemical and FTIR investigations

Aouadi

Souissi

2016

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

show abstract

“…Conceivably, under these conditions tin is covered with a precipitate. Consequently, larger values of b a can result from the mixed kinetic control (coupling of the charge transfer with the diffusion of electroactive species through the surface layer of corrosion products) 36 and this performance is usually termed as apparent 37 or partial 38 Tafel behavior. In fact, quite similar values of anodic as well as cathodic Tafel slopes were reported for tin 24, 39 and for Cu–Sn alloys (bronzes) containing IMC phases 23, 30 in open to air NaCl solutions.…”

Section: Resultsmentioning

confidence: 99%

The corrosion characteristics and solderability of immersion tin coatings on copper

Araźna

Królikowski

Kozioł

et al. 2012

Materials & Corrosion

View full text Add to dashboard Cite

Immersion tin is widely used as a lead free surface finish in the printed circuit board technology. Tin prevents the underlying copper from corrosion and preserves its solderability during a long storage and lead-free assembly processes. Investigated immersion tin coatings were deposited on copper foil from thiourea-type baths with hydrochloric acid addition (SnHCl coatings) or methanesulfonic acid addition (SnMSA coatings). Obtained coatings were investigated in the as deposited state and after aging (4 h at 155 8C, in air). The scanning electron microscopy studies revealed differences in structure of tin samples deposited from different baths. Results of polarization and impedance investigations indicated that as deposited SnHCl coatings had better corrosion resistance in 0.5 M NaCl solution than SnMSA coatings. The aging resulted in the improvement of the corrosion resistance of thinner coatings (0.2 and 0.5 mm thick SnHCl and 0.3 mm thick SnMSA), which were thoroughly converted into Sn-Cu intermetallic (IMC) phases. In contrary, thicker coatings exhibited some worsening of the corrosion resistance upon aging. The solderability of all as-deposited tin coatings was acceptable, but decreased after aging, especially for thinner coatings, showing the through conversion into Sn-Cu IMC phases.

show abstract

“…Copper is a widely used material in large infrastructure applications (grounding, While studies concerning copper corrosion in atmospheric or aqueous environments are abundant in the literature [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], the corrosion of copper or copper−based alloys in soils is scarce [26][27][28][29][30][31][32]. Despite this there is great importance in many industrial applications, as well as in archaeological studies of metal artifacts [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Thus understanding the corrosion of copper−based alloys buried in soil is a great challenge to provide valuable inputs concerning the mechanisms of alterations in cultural heritage artifacts. Soussi and Triki [32] have also studied the early stages of copper corrosion behavior in a Tunisian soil 4 The compaction of soil will affect the air permeability and therefore the diffusion of oxygen, through water saturated soil, is slow. Copper samples exposed to different soil environments, containing chloride, sulfide and ammonium salts as well as the damaging effects of chloride ions and the role of sulfides have been examined by Srivastava and Balasubramaniam [26], among few others.…”

Section: Introductionmentioning

confidence: 99%

Validation of the Steinrath Index Predictions for the Degree of Soil Aggressiveness Toward Copper Corrosion in Soils Contaminated with Chlorides

Fonseca¹,

Niculita²,

Ornelas³

et al. 2015

CORROSION

View full text Add to dashboard Cite

The main goal of this study is to validate the Steinhrath index predictions towards copper corrosion in two different soils (loamy and sandy) non−modified and modified with chlorides, reaching the typical levels of seawater and Steinrath indexes varying between (-3) and (-8). Average corrosion rates between 4.5±0.3 and 124.5±0.5 µm y -1 showed to be in good agreement with the predictions of the Steinrath index.The copper surfaces, covered with corrosion products, were analyzed by visual observation, scanning electron microscopy coupled to energy dispersive spectroscopy (SEM/EDS), powder X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy. Cuprite (Cu 2 O) has been identified, by XRD, as the main constituent on all the surfaces, with traces of atacamite (Cu 2 (OH) 3 Cl) on top of the Cu 2 O layer. FTIR spectra suggest that, sulfate, silicate and/or hydroxyls are likely to be present. and concluded that, for short time exposures, the mass loss decreases as the amount of water increases.Bech-Nielsen et al. [19] have studied the behavior of copper in moderately acid medium (pH 5.0) and non−deareated chloride aqueous solutions (3% NaCl). Using Auger spectroscopy, the authors identified the presence of a Cu 2 O layer on the surface of copper samples. The layer thickness was found to increase with the exposure time.Soil corrosivity is not a directly measurable parameter and corrosion is largely a random phenomenon, hence no explicit relationship exists between soil properties and soil corrosivity. The soil texture is a parameter that can influence its aggressiveness since the drainage and aeration are texture dependent. Gerwin and Baumhauer [31] have concluded that corrosion of buried iron objects decreased in loamy soils due to oxygen deficiency. On the other hand, a sandy soil results in comparatively good drainage and aeration.Correlation between the corrosion rate of pipeline made of steel and soil parameters has been investigated under both controlled laboratory and natural outdoor conditions by Murray and Moran [33]. They have found a good correlation between corrosion rates of laboratory and outdoor samples. In general, the moisture level appears to control the corrosion rate following a semilog law with water concentration ranging between low (typically 6 wt%) and near saturation (typically 20 to 25 wt%) concentrations. Wang et al. [34] have concluded that the decrease of dissolved oxygen contributes to decrease gradually the corrosion rate of X80 steel in acidic soil solution. In addition, Gardiner and Melchers [35] concluded that oxygen and proton ion (H+) as the most common cathodic depolarizers, both playing its role in the corrosion process of steel in soils.

show abstract

Early stages of copper corrosion behaviour in a Tunisian soil

Cited by 9 publications

References 54 publications

Early stages of tin bronze corrosion in neutral aqueous chloride media: Electrochemical and FTIR investigations

Early stages of tin bronze corrosion in neutral aqueous chloride media: Electrochemical and FTIR investigations

The corrosion characteristics and solderability of immersion tin coatings on copper

Validation of the Steinrath Index Predictions for the Degree of Soil Aggressiveness Toward Copper Corrosion in Soils Contaminated with Chlorides

Contact Info

Product

Resources

About