Effect of TiO2 nanoparticles and SDBS on corrosion behavior of 3003 aluminum alloy in aqueous ethylene glycol containing chloride ions at high temperature

Purpose This paper aims to study the effect of chloride ions concentration on the corrosion behavior of carbon steel in methyldiethanolamine (MDEA) aqueous solution in the sight of different process parameters of purification plant. Design/methodology/approach Due to the decrease of filtration efficiency and separation efficiency, the chloride ion in the desulfurization solution is enriched. The corrosion behavior of carbon steel under chloride ion enrichment environment was studied by weight-loss method, electrochemical impedance spectroscopy, cyclic polarization curve, X-ray photoelectron spectroscopy and scanning electron microscopy. Findings The results show that temperature and hydrogen sulfide loads are the main factors of corrosion in CO2-MDEA-H2O-H2S environment. The enrichment of chloride ions reduces the corrosion rate at low temperature but promotes the corrosion rate at high temperature. The chloride concentration should be controlled below 3000 mg/L, and no pitting corrosion was found under the experimental conditions. Originality/value The effect of chloride ion enrichment on MDEA solution corrosion shows that at low temperature, the increase of chloride ion will reduce the acid gas load and increase the density of corrosion products, so as to reduce the corrosion; on the contrary, at high temperature, the density of corrosion products will decrease and the corrosion will be intensified as well. It is believed that the chloride ion should be controlled below 3000 mg/L according to the results of the tests.

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Electrochemical investigation on the effects of sulfate ion concentration, temperature and medium pH on the corrosion behavior of Mg–Al–Zn–Mn alloy in aqueous ethylene glycol

Journal of Magnesium and Alloys ◽

10.1016/j.jma.2016.12.003 ◽

2017 ◽

Vol 5 (1) ◽

pp. 64-73 ◽

Cited By ~ 3

Author(s):

H. Medhashree ◽

A. Nityananda Shetty

Keyword(s):

Ethylene Glycol ◽

Corrosion Behavior ◽

Ion Concentration ◽

Electrochemical Investigation ◽

Sulfate Ion ◽

Medium Ph ◽

Aqueous Ethylene Glycol

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Corrosion Behavior of 3A21 Aluminum Alloy in Water- Ethylene Glycol Coolant under Simulated Engine Working ConditionsCorrosion Behavior of 3A21 Aluminum Alloy in Water- Ethylene Glycol Coolant under Simulated Engine Working Conditions

International Journal of Electrochemical Science ◽

10.20964/2021.06.05 ◽

2021 ◽

pp. ArticleID:21062

Author(s):

Hanyang Zuo ◽

Keyword(s):

Aluminum Alloy ◽

Ethylene Glycol ◽

Corrosion Behavior ◽

Working Conditions

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Corrosion Study of Aluminum Alloy 3303 in Water-Ethylene Glycol Mixture: Effect of Inhibitors and Thermal Shocking

International Journal of Corrosion ◽

10.1155/2019/9020489 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6 ◽

Cited By ~ 4

Author(s):

Mohammad Asadikiya ◽

Yu Zhong ◽

Mohammad Ghorbani

Keyword(s):

Stainless Steel ◽

Aluminum Alloy ◽

Corrosion Rate ◽

Ethylene Glycol ◽

Mild Steel ◽

Corrosion Inhibitors ◽

Galvanic Corrosion ◽

Aqueous Ethylene Glycol ◽

Glycol Solution ◽

Effect Of Inhibitors

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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