Copper corrosion in soil: influence of chloride contents, aeration and humidity

Afonso, Fernando; Neto, M. M. M.; Mendonça, M.H.; Pimenta, Gervásio; Proença, Luís; Fonseca, I.

doi:10.1007/s10008-009-0868-4

Cited by 20 publications

(19 citation statements)

References 13 publications

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“…Results are also in accordance with those previously reported [28,29]. Results are also in accordance with those previously reported [28,29].…”

Section: Xrd Studiessupporting

confidence: 94%

“…We have also performed several studies using electrochemical tehniques for the evaluation of the corrosion resistance and corrosion characteristics of many corrosion processes of metals and alloys in aqueous solutions [48][49][50][51][52] and also for copper corrosion in soils [28,29].…”

Section: Methodsmentioning

confidence: 99%

“…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%

“…Our group has performed previous studies on the corrosion of copper in soil environments, under various experimental conditions, including the effect of chloride ions [28,29]. Such studies were performed with a soil under alkaline pH and high concentrations of Fe and Mn salts.…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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“…Results are also in accordance with those previously reported [28,29]. Results are also in accordance with those previously reported [28,29].…”

Section: Xrd Studiessupporting

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

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“…Finally, we note that the efficacy of copper barriers might be reduced in the field due to moisture, rain and corrosion (Godin, 1983). The level of corrosion depends on chloride concentration, oxygen availability and acidity of the soil and possibly also on other factors (Afonso et al, 2009). The impact of copper corrosion on the current flow, voltage drop across the barrier electrodes and effectiveness of the barrier as a slug repellent in the field remains to be determined in future studies.…”

Section: Discussionmentioning

confidence: 99%

The effectiveness of electrified fencing using copper electrodes for slug (Airon spp.) control with direct electric current and voltage

Laznik

Križaj

Trdan

1970

Span. j. agric. res.

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Terrestrial slugs of the genus Arion are native to Europe, where they represent an important agricultural pest. This study determined the effectiveness of electrified fencing on barrier crossing by slugs. The fences were placed in glass insectariums. DC (direct current) voltages (2, 4, 6, 8 and 10 V) applied across the fence were tested together with limiting electric current values (0.1, 0.01 and 0.001 mA). Four categories of behavior were identified for slugs in the presence of an electrified fence: the animals (1) were stationary, (2) were moving but avoided the electrodes, (3) touched the electrodes and/or attempted unsuccessfully to cross the electrified fence and (4) succeeded in crossing the electrified fence. The effect of the applied voltages and the limiting current values on slug movement was highly significant. Forty-one percent of slugs crossed the fence at the lowest applied voltage, whereas only 1% of slugs succeeded in crossing at the highest voltage. The lowest limiting current values resulted in the most frequent fence crossings. For larger voltages and limiting currents, the frequency of slug crossings was effectively zero at fence regions positioned on the glass walls of the insectariums. In conclusion, this method of slug prevention may be highly effective, environmentally friendly and may result in deterrence, not death, of terrestrial slugs, a ubiquitous pest responsible for significant economic damage in agriculture.Additional key words: behavioral events; crossing; pests; repellent; terrestrial mollusks. Resumen Efectividad de las vallas electrificadas con electrodos de cobre en el control de las babosas (Arion spp.) bajo corriente continua y voltaje eléctricoLas babosas terrestres del género Arion son nativas de Europa, donde representan una importante plaga agrícola. En este trabajo se determinó la eficacia de usar barreras electrificadas para impedir el paso de las babosas. Se colocaron vallas electrificadas en insectarios de vidrio y se aplicaron voltajes de CC (2, 4, 6, 8 y 10 V), limitados por diferentes valores de corriente eléctrica (0,1, 0,01 y 0,001 mA). Se identificaron cuatro diferentes respuestas de comportamiento de las babosas: (1) se quedaron quietas, (2) se movieron evitando los electrodos, (3) tocaron los electrodos e/o intentaron, sin éxito, cruzar la valla y (4) lograron cruzar la valla electrificada. El efecto de los voltajes aplicados y de los valores de corriente limitantes en el movimiento de las babosas fue muy significativo. El 41% de las babosas cruzó la valla con el menor voltaje aplicado, mientras que sólo el 1% de las babosas logró cruzar con el voltaje más alto. Los valores más bajos de corriente dieron lugar a los cruces más intensos de la valla. Para tensiones y corrientes más altas la frecuencia de los cruces de las babosas fue prácticamente cero en las zonas de la valla colocada en las paredes de vidrio de la insectarios. En conclusión, este método de control de las babosas puede ser muy eficaz, respetuoso con el medio ambiente y producir disua...

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Corrosion behavior of zinc and copper coated structural steels in soil environments

Pålsson

Khamsuk

Sorachot

et al. 2022

Materialwissenschaft Werkst

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Corrosion behavior of structural carbon steels grade SS400 coated with copper and zinc exposed to soil sample extracted from the central part of Thailand is studied using weight loss analyses and electrochemical methods, including open circuit potential monitoring for 3600 seconds, electrochemical impedance spectroscopic analyses and potentiodynamic polarization measurements. Bare carbon steels are also examined as a reference. Open circuit potential and polarization resistance of all samples are measured on (1, 2, 3, 4, 7, 10, 15, 30, 45, 60, 77 and 91) days of exposure. Corrosion potential is monitored only on the first and last days. After 91 days, corrosion rate in millimeter per year is calculated from weight loss and corrosion product is characterized. Effects of coating material, thickness and process on corrosion resistance of carbon steel subjected to soil environment are reported and discussed.

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Copper corrosion in soil: influence of chloride contents, aeration and humidity

Cited by 20 publications

References 13 publications

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

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

The effectiveness of electrified fencing using copper electrodes for slug (Airon spp.) control with direct electric current and voltage

Corrosion behavior of zinc and copper coated structural steels in soil environments

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