Cathodic reaction kinetics and its implication on flow-assisted corrosion of aluminum alloy in aqueous ethylene glycol solution

Three types of corrosion inhibitors consisting of sodium diphosphate (Na2H2P2O7), sodium benzoate (NaC7H5O2), and sodium tetraborate (Na2B4O7) were evaluated to analyze their effectiveness to inhibit the aluminum alloy 3303 (UNS A93303) against corrosion, in water-ethylene glycol (C2H6O2) mixture. Potentiodynamic polarization tests were carried out to study the effect of each chemical. The temperature of solutions was 88°C and the aluminum samples were coupled with five other metals consisting of mild steel, stainless steel, brass, copper, and solder to include the effect of galvanic corrosion. The results showed that sodium diphosphate can effectively protect the aluminum alloy 3303 in comparison with two other chemicals. The effect of thermal shocking on the corrosivity of water-ethylene glycol solution was also investigated. It was indicated that the corrosivity of water-ethylene glycol solution increases because of thermal shocking, which oxidizes the aqueous ethylene glycol. The corrosion rate of aluminum alloy 3303 coupled with the five metals in thermal shocked water-ethylene glycol solution is 142 mpy, while it is 94 mpy in fresh water-ethylene glycol solution.

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Solubilities of carbon dioxide, oxygen, and nitrogen in aqueous ethylene glycol solution under low pressures

Fluid Phase Equilibria ◽

10.1016/j.fluid.2018.11.035 ◽

2019 ◽

Vol 485 ◽

pp. 16-22 ◽

Cited By ~ 2

Author(s):

Tao Jia ◽

Shengshan Bi ◽

Jiangtao Wu

Keyword(s):

Carbon Dioxide ◽

Ethylene Glycol ◽

Aqueous Ethylene Glycol ◽

Glycol Solution ◽

Low Pressures

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Studies on Corrosion of Mg-Al-Zn Alloy in 30% Aqueous Ethylene Glycol

Materials Science Forum ◽

10.4028/www.scientific.net/msf.830-831.679 ◽

2015 ◽

Vol 830-831 ◽

pp. 679-682

Author(s):

Harishbhat Medhashree ◽

A.Nityananda Shetty

Keyword(s):

Ethylene Glycol ◽

Electrochemical Impedance ◽

Activation Parameters ◽

Corrosion Studies ◽

Automobile Engines ◽

Different Temperatures ◽

Aqueous Ethylene Glycol ◽

Engine Components ◽

Glycol Solution ◽

Zn Alloy

The Mg-Al-Zn alloy is used in the coolant systems of automobile engines. Corrosion of Mg-Al-Zn engine components by coolants, which consist of 30% aqueous ethylene glycol as a coolant composition, is an important issue in automobile industries. With this preview, in the present study it is intended to study the effect of environmental contaminant sulphate ions on the corrosion behavior of Mg-Al-Zn alloy in 30% (v/v) aqueous ethylene glycol solution. Electrochemical investigations were carried out by potentiodynamic polarization and electrochemical impedance spectroscopy techniques. Scanning electron microscopy (SEM) and energy dispersion X-ray analysis (EDX) were used to study the surface morphology and composition of the alloy. Activation parameters for the corrosion process were calculated by conducting the corrosion studies at different temperatures. It was observed that corrosion rate of the alloy in 30% (v/v) aqueous ethylene glycol increases with the increase in the concentration of sulphate ions and also with the increase in temperature.

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Micellization Behavior of Cationic Gemini Surfactants in Aqueous-Ethylene Glycol Solution

Journal of Surfactants and Detergents ◽

10.1007/s11743-011-1280-5 ◽

2011 ◽

Vol 14 (4) ◽

pp. 555-562 ◽

Cited By ~ 17

Author(s):

Deepti Tikariha ◽

Birendra Kumar ◽

Namrata Singh ◽

Kallol K. Ghosh ◽

Pierluigi Quagliotto

Keyword(s):

Ethylene Glycol ◽

Gemini Surfactants ◽

Cationic Gemini Surfactants ◽

Aqueous Ethylene Glycol ◽

Glycol Solution ◽

Micellization Behavior

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A pulse radiolysis study of trapped electrons in aqueous ethylene glycol glasses

Canadian Journal of Chemistry ◽

10.1139/v83-033 ◽

1983 ◽

Vol 61 (1) ◽

pp. 189-193 ◽

Cited By ~ 3

Author(s):

Zhennan Wu ◽

Norman V. Klassen ◽

Hugh A. Gillis ◽

George G. Teather

Keyword(s):

Ethylene Glycol ◽

Reaction Kinetics ◽

Pulse Radiolysis ◽

Trapped Electrons ◽

Aqueous Ethylene Glycol ◽

The Stability ◽

Kinetics Of

The yield and reaction kinetics of trapped electrons, [Formula: see text] and [Formula: see text], in several ethylene glycol/D2O glasses have been studied from 6–72 K by pulse radiolysis. An increased D2O concentration is believed to increase the concentration of IR-traps thereby leading to a greater [Formula: see text] and to decrease the concentration of VIS-traps thereby increasing the stability of [Formula: see text]. The yield and stability of [Formula: see text] are also increased by lowering the temperature. A redetermination of [Formula: see text] (1.3 × 104 M−1 cm−1 at 1800 nm) confirms earlier values.

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