Electrochemical corrosion study of Mg–Al–Zn–Mn alloy in aqueous ethylene glycol containing chloride ions

Medhashree, Harish; Shetty, A. Nityananda

doi:10.1016/j.jmrt.2016.04.003

Cited by 35 publications

(9 citation statements)

References 53 publications

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“…All coupons were prepared properly, for which, they were sanded dry with 800-grit abrasive paper, degreased using acetone, then washed using bidistilled water, then dried in a laboratory oven. Finally, they were weighed using a precision analytical balance and installed immediately in the aforementioned units [48,49,50].…”

Section: Corrosion Testsmentioning

confidence: 99%

“…For reproducibility, each test was performed in duplicate [51]. To minimise changes in the coupon composition, the coupons were suspended with nylon thread in the channel after filtration and in the storage tank [49]. After each trial period, the coupons were removed in accordance with the ASTM Standard G1-03 [41] for the cleaning and evaluation of corrosion coupons.…”

Section: Implementation Of Corrosion Controls In the Treatment Plantmentioning

confidence: 99%

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Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

García-Ávila¹,

Pino²,

Bonifaz-Barba³

et al. 2019

JESTR

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Copper pipes corrosion that transport potable water can deteriorate water quality within a distribution system, releasing high copper amounts, exceeding the maximum concentration copper for potable water standards. This study examines the influence of free chlorine on the leaching of copper in the pipes used for the distribution of drinking water. A series of tests was carried out using corrosion test coupons extractable constructed of copper material. The coupons were installed in units containing filtered water (without chlorine, 0 mg/L) and water treated with an average residual chlorine concentration of 0.85 mg/L in the water treatment plant in Azogues city, Ecuador. A corrosion test rack was also installed in a house with an average residual chlorine concentration of 0.37 mg/L. Coupons in these sites were exposed in duplicate for one, two, three and six months. The corrosion coupons were then extracted and weighed to establish the corrosion rate by gravimetric technique. Additional tests were performed in static immersion laboratory tests using drinking water with chlorine concentrations ranging from 0.25 to 5 mg/L for one month. The weight loss tests indicated that an increase in free chlorine concentration, the greater release of copper and therefore a higher corrosion rate.

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Section: Corrosion Testsmentioning

confidence: 99%

Section: Implementation Of Corrosion Controls In the Treatment Plantmentioning

confidence: 99%

Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

García-Ávila¹,

Pino²,

Bonifaz-Barba³

et al. 2019

JESTR

View full text Add to dashboard Cite

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“…In aggressive solutions, impedance diagrams of Mg alloys normally contain one or two capacitance loops at high and medium frequencies and one inductive loop at low frequencies [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Further studies have indicated that the capacitance loops represent the charge transfer process across the capacitive double layer and the accumulated corrosion products, and the inductive loops represent the relaxation process of intermediate species (mainly

) [ 22 , 23 , 24 , 25 , 26 , 27 ]. In this case, the corrosion behavior of Mg alloys can be characterized by the shape of EIS diagrams and the values of the fitting parameters.…”

Section: Introductionmentioning

confidence: 99%

Influence of Long-Period Stacked Ordered Phases on Inductive Impedance of Mg-Gd-Y-Zn-Zr-Ag Alloys

Liu

Gao

et al. 2023

Materials

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In this paper, the influence of long-period stacked ordered (LPSO) phases on the electrochemical impedance spectroscopy (EIS) of a Mg-Gd-Y-Zn-Zr-Ag alloy in 0.9 wt.% NaCl was investigated. The Mg-6Gd-3Y-1Zn-0.5Zr-0.3Ag (wt.%) alloy samples with and without LPSO phases in the grain interior (HOMO and LPSO, respectively) were prepared using different heat treatments. The EIS results showed that both the HOMO and LPSO samples’ Nyquist diagrams contained two inductive loops. However, in the Nyquist plots of the LPSO samples, the inductive loops at 1.71–0.67 Hz appeared in the first quadrant rather than the fourth quadrant. Analysis of the fitting parameters illustrated that the abnormal shape of the inductive loops is related to greater values of the surface film capacitance Cf and double layer capacitance Cdl in the LPSO samples. Further investigations through corrosion morphology observation indicated that the greater values of Cf and Cdl in the LPSO samples resulted from the existence of intragranular LPSO phases that created more film-free areas. The above results show that a better understanding of the relationship between the inductive impedance and corrosion morphology of a Mg-6Gd-3Y-1Zn-0.5Zr-0.3Ag alloy in 0.9 wt.% NaCl solution was attained.

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“…Ethylene glycol (EG), a colourless, odourless, and sweet tasting syrup is the second member of this family and is deemed most essential [7] because of its moderate toxicity compared to others. One of its uses is as a coolant in engines [9,10]. It is known that engine coolants are often contaminated by chlorides and as effect induce the corrosion of metals used in the coolant system [9].…”

Section: Introductionmentioning

confidence: 99%

“…One of its uses is as a coolant in engines [9,10]. It is known that engine coolants are often contaminated by chlorides and as effect induce the corrosion of metals used in the coolant system [9]. The dissolution of metals in EG-water solution have been studied.…”

Section: Introductionmentioning

confidence: 99%