Operando kinetics of hydrogen evolution and elemental dissolution I: The dissolution of galvanized steel in hydrochloric acid

Dou, Baojie; Li, Xuejie; Han, Junsoo; Ogle, K.

doi:10.1016/j.corsci.2023.111007

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…Based on the above results, the corrosion mechanism diagrams of galvanized steel in a simulated marine environment, under UV irradiation coupling with an alternating wet and dry in a NaCl solution, are proposed and presented in Figure 10. According to our previous study, the galvanization process with a molten 0.1-1 at% Al-Zn bath resulted in an outer layer (Zn-Al coating), and an intermetallic film (20-50 nm) formed between the zinc coating and the steel substrate, presumably in the form of Fe2Al5 Znx (0 < x < 1), which can inhibit the formation of Fe-Zn intermetallic phase or "outbursts" that are detrimental to the mechanical properties of the final coating [30]. As shown in Figure 10a, in a neutral NaCl solution, the Zn-rich phase is more active than the Al-rich phase; consequently, Zn 2+ ions formed in an anodic reaction (in Equation ( 1)), whilst a cathodic reaction (O2 reduction as shown in Equation ( 2)) occurred on the Alrich phase.…”

Section: Corrosion Mechanismmentioning

confidence: 99%

Effect of UV Irradiation on the Alternating Wet and Dry Corrosion Behavior of Galvanized Steel in Sodium Chloride Solution

Pan,

Wang,

Yang

et al. 2023

Crystals

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In this paper, the corrosion performance of galvanized steel was investigated in a simulated marine environment, under UV irradiation coupling with an alternating wet and dry cycle in a NaCl solution. The surface morphology, composition, and corrosion performance of galvanized steel before and after different alternating wet and dry corrosion under UV irradiation were investigated. The results show that the corrosion current density gradually increases and the corrosion resistance decreases as a function of the alternating wet and dry corrosion cycles. Meanwhile, UV irradiation accelerates the increase in the corrosion current density and the decrease in the corrosion resistance. In addition, the corrosion product ZnO shows a semiconductor property, and the photo-induced electrons and holes produced under UV can participate in the corrosion reaction and promote the formation of loose corrosion products Zn(OH)2, Zn5(OH)8Cl2, and Al2Cl3(OH)5·4H2O, thus accelerating the corrosion of galvanized steel in the atmosphere environment.

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Section: Corrosion Mechanismmentioning

confidence: 99%

Effect of UV Irradiation on the Alternating Wet and Dry Corrosion Behavior of Galvanized Steel in Sodium Chloride Solution

Pan,

Wang,

Yang

et al. 2023

Crystals

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“…The gravimetric method was combined with an electrochemical flow cell and the AESEC technique which permits a time resolved masscharge balance of dissolution. 24,25 Hoshi et al 10,26,27 developed a gas chromatography method to detect H 2 evolution rates. Lebouil et al 28 presented a time resolved volumetric method based on visual imaging of the gas bubbles released from an electrochemical flow cell to a microfluidic flow system.…”

Section: Respirometric Approachmentioning

confidence: 99%

“…Validation experiments of the gravimetric method coupled to an electrochemical flowcell by cathodic polarization of Pt showed that the measured H 2 equivalent current was systematically below the applied electric current for cathodic currents below −5 mA. 25 One major factor is the solubility of H 2 into the aqueous electrolyte which has to be considered as a possible source of error. 2 A more sensitive method is required to extend the respirometric monitoring principle to more corrosion resistant materials and to investigate smaller amounts of consumed or evolved H 2 or O 2 .…”

Section: Respirometric Approachmentioning

confidence: 99%

Respirometric in Situ Methods for Real-Time Monitoring of Corrosion Rates: Part III. Deconvolution of Electrochemical Polarization Curves

Strebl

Bruns

Virtanen

2023

J. Electrochem. Soc.

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A highly sensitive respirometric method is presented that allows real-time monitoring of reaction rates involving H2 and O2 during electrochemical polarization. The measurement approach is based on simultaneous monitoring of the changes in the total pressure and the O2 partial pressure inside a closed chamber. Hence, it is possible to quantify the rates resulting from reactions such as H2 evolution reaction (HER), O2 reduction reaction, and O2 evolution reaction as a function of the applied potential. As a result, deconvolution of the net electric current into cathodic and anodic partial reaction rates during electrochemical polarization can be obtained. It was demonstrated that the respirometric monitoring approach can reveal superfluous cathodic reactions from Al during cathodic polarization as well as during anodic polarization of Al and Mg AZ31. Thus, the true metal oxidation rate could be determined from the electric current and the cathodic reaction rates. Furthermore, the rate of the HER during cathodic electrodeposition of Zn was measured. Through respirometric monitoring of Ni and stainless steel at high anodic potentials, the rate of O2 evolution could be distinguished from electrode oxidation processes.

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“…Dou in an HCl solution. Their research reveals the dissolution kinetics of galvanized steel and identifies the presence of an intermetallic layer in the form of Fe 2 Al 5 , with a total thickness of 50 nm [11].…”

Section: Introductionmentioning

confidence: 99%

Roles of Al and Mg on the Microstructure and Corrosion Resistance of Zn-Al-Mg Hot-Dipped Coated Steel

Guo,

Wang,

et al. 2024

Materials

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In this work, a novel zinc–aluminum–magnesium (Zn-Al-Mg, ZM) coated steel was prepared using the hot-dip method. The microstructure and corrosion resistance of the ZM-coated steel were investigated. Compared to the conventional galvanized steel (GI), the ZM coating demonstrated a distinctive phase structure, consisting of Zn phase, binary eutectic (Zn/MgZn2), and ternary eutectic (Zn/Al/MgZn2). The corrosion resistance of the ZM-coated and GI-coated steels was evaluated by neutral salt spray test (NSST), polarization and electrochemical impedance spectroscopy (EIS). The results indicated that ZM-coated steel provided superior long-term corrosion protection in a NaCl environment compared to GI-coated steel. The scanning vibrating electrode technique (SVET) proved to be an effective method for investigating the evolution of the anodic and cathodic on the local coating surface. GI-coated steel exhibited a potential and current density distribution between the cathodic and anodic sites nearly three orders of magnitude higher than that of ZM-coated steel, suggesting a higher corrosion rate for GI-coated steel.

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Operando kinetics of hydrogen evolution and elemental dissolution I: The dissolution of galvanized steel in hydrochloric acid

Cited by 6 publications

References 24 publications

Effect of UV Irradiation on the Alternating Wet and Dry Corrosion Behavior of Galvanized Steel in Sodium Chloride Solution

Effect of UV Irradiation on the Alternating Wet and Dry Corrosion Behavior of Galvanized Steel in Sodium Chloride Solution

Respirometric in Situ Methods for Real-Time Monitoring of Corrosion Rates: Part III. Deconvolution of Electrochemical Polarization Curves

Roles of Al and Mg on the Microstructure and Corrosion Resistance of Zn-Al-Mg Hot-Dipped Coated Steel

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