Corrosion behaviour of non-ferrous metals embedded in mortar

Duffó, G.S.; Farina, S.B.; Rodrìguez, Fernando

doi:10.1016/j.conbuildmat.2019.03.208

Cited by 17 publications

(6 citation statements)

References 14 publications

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“…Numerous researchers have determined corrosion rates from weight loss measurements up to 15 times higher than those obtained by electrochemical techniques [58][59][60][61][62][63]. These significant differences might be due to (a) the increase in the hydrogen evolution rate observed during anodic polarization (often termed the negative difference effect or NDE); (b) the partial disintegration of specimens into fine metallic particles; (c) participation of reaction intermediates during anodic dissolution; and (d) a significant difference in the instantaneous corrosion rate determined by the electrochemical techniques compared with the average corrosion rate provided by weight loss [19,[64][65][66][67][68]. Moreover, further analysis of the results shows that if B values in Table 5 are used instead of B for i corr determination using R p in the Stern-Geary equation, the real corrosion rate (as determined by weight loss) is underestimated by between one and two orders of magnitude.…”

Section: Determination Of Apparent Stern-geary Coefficient (B ) For T...mentioning

confidence: 99%

Experimental Apparent Stern–Geary Coefficients for AZ31B Mg Alloy in Physiological Body Fluids for Accurate Corrosion Rate Determination

García-Galván

Fajardo

Barranco

et al. 2021

Metals

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The corrosion behavior of AZ31B Mg alloy exposed to Ringer’s, phosphate-buffered saline (PBS), Hank’s, and simulated body fluid (SBF) solutions for 4 days was investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, weight loss, and surface characterization. Changes in corrosion rates with immersion time determined by weight loss measurements were compared with EIS data to determine the possibility of obtaining quantitative electrochemical information. In addition, changes in the protective properties of the corrosion product layer calculated from the EIS parameters were evaluated as a function of their surface chemical composition as determined by X-ray photoelectron spectroscopy (XPS) and visual observations of the corroded specimen’s surface. Apparent Stern–Geary coefficients for the AZ31B Mg alloy in each test solution were calculated using the relationship between icorr from weight loss measurements and the EIS data (both Rp and Rt). This provided experimental reference B′ values that may be used as a useful tool in independent investigations to improve the accuracy of corrosion rates of AZ31B Mg alloy in simulated body solutions.

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Section: Determination Of Apparent Stern-geary Coefficient (B ) For T...mentioning

confidence: 99%

Experimental Apparent Stern–Geary Coefficients for AZ31B Mg Alloy in Physiological Body Fluids for Accurate Corrosion Rate Determination

García-Galván

Fajardo

Barranco

et al. 2021

Metals

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“…Effect of cation type of chloride salts on corrosion behaviour of steel by potentio-dynamic polarization test in concrete powder electrolyte solution in presence of corrosion inhibitors [13]. Al, Cu and Pb may be get into communicate with the cement materials and may be corrode, by loss of weight check of these materials in parts of their corrosion resistance in luting [14]. Fumaria officinalis was used, as a natural inhibitor [15], Nutmeg oil [16], Tannin used as natural corrosion inhibitor for aluminum alloys [17], green tea extract (GT) was used as inhibitor for the corrosion [18], The pectin from tomato peel waste (TPP) was employed as tin corrosion inhibitor [19], tobacco rob extract (TRE) used for Q235 corrosion inhibitor in artificial seawater [20], olive (Olea europaea L) leaf extract, used as corrosion inhibitors for steel in brine solution [21], Silybum marianum leaves extract as a 304 stainless steel corrosion inhibitor [22], purple rice bran, extract, used as corrosion inhibitor [23], natural honey with black radish juice, used as corrosion inhibitor of tin [24], and Lupine seeds extract used for steel corrosion inhibitor [25].…”

Section: -Introductionmentioning

confidence: 99%

Study The Effect of Extract berry and mango leaves as a corrosion inhibitor of Cu, Carbon steel and Oil Pipelines.

Matter,

Ayad

2022

JOPAS

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For the corrosion of iron, copper and carbon steel in 1.0 M HCl and 1.0 M of HNO3 solution. The materials extracted from the berry and mango leaves when added in different concentrations to solutions of 1 molar of hydrochloric acid and nitric acid have shown remarkable and effective resistance to corrosion of iron, copper and carbon steel, as well as to the samples that we brought from the oil companies in Galo to study the extent of resistance of these materials to their corrosion and the use of these natural and extracted products of berry leaves and mango leaves for use as corrosion inhibitors for oil pipelines These natural products, which are available in the environment, have shown a great deal of effective resistance to corrosion of oil pipelines. The effect of both the temperature and the concentration of these substances on the corrosion of these minerals has been studied and the study has shown that they inhibit corrosion even at low concentrations of reach to 50 ppm.

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“…According to Halstead's report [3], copper pipes are used in concrete when there is no contamination with ammonia. The use of copper in the construction field is fully spread in residential electrical wiring and the transport of water, heating, natural gas and refrigeration [4]. On the other hand, it is also used in gutters and downspouts, suspended gutters, vertical walls, the crowning of walls, expansion joints for buildings, and in wall covering [5].…”

Section: Introductionmentioning

confidence: 99%

“…There are few studies on the corrosion susceptibility of copper exposed to concrete environments, and most of these do not employ electrochemical techniques, even though they have the advantage of being practical and fast [2,4,7,8,11].…”

Section: Introductionmentioning

confidence: 99%

Copper Corrosion Behavior in Simulated Concrete-Pore Solutions

Bacelis

Véleva

Alpuche-Avilés

2020

Metals

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The copper corrosion was studied for 30 days in two alkaline electrolytes: saturated Ca(OH)2 and cement extract, employed to simulate concrete-pore environments. Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry were carried out at the open circuit potential (OCP), and potentiodynamic polarization (PDP) curves were performed for comparative purposes. Electrochemical current fluctuations, considered as electrochemical noise (EN), were employed as non-destructive methods. The tests revealed that sat. Ca(OH)2 is the less aggressive to the Cu surface, mainly because of the lower in one order pH. In consequence, the OCP values of Cu were more positive, the polarization resistance values were higher by one order of magnitude, and the anodic currents of Cu were lower than those in the cement extract. The analyzed EN indicated that the initial corrosion attacks on the Cu surface are quasi-uniform, resulting from the stationary persistent corrosion process occurring in both model solutions. XPS analysis and X-ray diffraction (XRD) patterns revealed that in sat. Ca(OH)2, a Cu2O/CuO corrosion layer was formed, which effectively protects the metallic Cu-surface. We present evidence for the sequential oxidation of Cu to the (+1) and (+2) species, its impact on the corrosion layer, and also its protective properties.

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Corrosion behaviour of non-ferrous metals embedded in mortar

Cited by 17 publications

References 14 publications

Experimental Apparent Stern–Geary Coefficients for AZ31B Mg Alloy in Physiological Body Fluids for Accurate Corrosion Rate Determination

Experimental Apparent Stern–Geary Coefficients for AZ31B Mg Alloy in Physiological Body Fluids for Accurate Corrosion Rate Determination

Study The Effect of Extract berry and mango leaves as a corrosion inhibitor of Cu, Carbon steel and Oil Pipelines.

Copper Corrosion Behavior in Simulated Concrete-Pore Solutions

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