Effect of hydrostatic pressure on the thermodynamic and kinetic behavior of metal electrode reactions

Ma, Renzhi; Shen, Yufeng; Wang, Changgang; Jian, Dong; Ke, Wei

doi:10.1016/j.electacta.2022.140617

Cited by 6 publications

(6 citation statements)

References 48 publications

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“…In aqueous solution, the increase of temperature will not only increase the diffusion rate of ions, but also accelerate the corrosion reactions at the solution/AMC interfaces, so the pore resistance and charge transfer resistance will decrease when the temperature increases. In terms of hydrostatic pressure, the chemical activities of ions and metal elements at the solution/AMC interfaces increase with the increase of pressure, leading to the promotion of corrosion reactions [ 44 ]. Thus, similar to temperature, the charge transfer resistance of the solution/AMC interfaces also decreases when the pressure increases to 80 atm.…”

Section: Resultsmentioning

confidence: 99%

Effects of Temperature and Pressure on Corrosion Behavior of HVOF-Sprayed Fe-Based Amorphous Coating on the Mg-RE Alloy for Dissolvable Plugging Tools

Sun

Yang²,

Zhang

2023

Materials

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To retard the degradation of the magnesium alloys for dissolvable ball seats, Fe-based amorphous coatings were deposited on dissolvable Mg-RE alloy substrates using high velocity oxygen-fuel spraying technology. The results show that the Fe-based amorphous coatings possess low porosity (0.82%) and high amorphous contents (91.4%) and their corrosion resistance decreases with the increase of temperature or pressure. However, with the help of Fe-based amorphous coatings, the degradation time of dissolvable Mg-RE alloy has been significantly prolonged. In particular, the service life of coated Mg-RE alloy exceeds 360 h at temperatures below 50 °C and reaches 87 h at 120 °C and 80 atm. Under high temperature and high pressure, the compactness of passive films decreases and the chemical activities of ions and metal elements increase, leading to the degradation of corrosion resistance of Fe-based amorphous coatings. In long-term corrosion, the crystallized splats are prone to corrosion because of the multiphase structures. The corroded crystallized splats are connected to the inevitable pores by the corroded intersplat regions, resulting in the formation of corrosion channels and the corrosion failure of coatings. This study provides a useful guidance for the corrosion protection of dissolvable plugging tools made of magnesium alloys.

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Section: Resultsmentioning

confidence: 99%

Effects of Temperature and Pressure on Corrosion Behavior of HVOF-Sprayed Fe-Based Amorphous Coating on the Mg-RE Alloy for Dissolvable Plugging Tools

Sun

Yang²,

Zhang

2023

Materials

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“…Under high pressure conditions, the reduction reaction rate of oxygen may be accelerated, contributing to the higher exchange current density of the cathodic reduction of dissolved oxygen. [ 20 ]…”

Section: Resultsmentioning

confidence: 99%

“…[17][18][19] High hydrostatic pressure has only a small effect on cathodic behavior, but this accelerates anodic dissolution, and hence, the corrosion of the alloy. [18,[20][21][22][23] Ma et al investigated the effect of hydrostatic pressure on the thermodynamic and kinetic behaviors of metal electrode reactions. [20] The research revealed that hydrostatic pressure can change the partial molar volume and activity of metal and environmental components.…”

Section: Introductionmentioning

confidence: 99%

“…[18,[20][21][22][23] Ma et al investigated the effect of hydrostatic pressure on the thermodynamic and kinetic behaviors of metal electrode reactions. [20] The research revealed that hydrostatic pressure can change the partial molar volume and activity of metal and environmental components. Consequently, the equilibrium potential and exchange current density of each electrode reaction in the corrosion process are also influenced.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the equilibrium potential and exchange current density of each electrode reaction in the corrosion process are also influenced. [ 20 ] The effect of dissolved oxygen on corrosion behavior is complex. An increase in dissolved oxygen can promote the corrosion of B10 alloy, but this can also accelerate the formation of dense corrosion products, inhibiting further corrosion.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the corrosion behavior of B30 alloy in a deep‐sea environment by using the response surface methodology

Yin,

Meng,

Zhao

et al. 2023

Materials & Corrosion

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The corrosion behavior of B30 copper‐nickel alloy in a deep‐sea environment was investigated by using the self‐built loop apparatus based on the response surface methodology. The results indicated that all the environmental factors accelerate the corrosion of alloys. The degree of effect of the individual factors decreased in the following order—dissolved oxygen > temperature > flow rate > pressure. Moreover, there exist interaction effects between any two of the environmental factors, of which the one between temperature and pressure is the most significant. A mathematical relationship between these factors and the corrosion behavior for B30 alloy was established. The accuracy of the corrosion model was verified by immersion and electrochemical testing.

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Stress corrosion cracking of the titanium alloys under hydrostatic pressure resulting from the degradation of passive films

et al. 2023

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Effect of hydrostatic pressure on the thermodynamic and kinetic behavior of metal electrode reactions

Cited by 6 publications

References 48 publications

Effects of Temperature and Pressure on Corrosion Behavior of HVOF-Sprayed Fe-Based Amorphous Coating on the Mg-RE Alloy for Dissolvable Plugging Tools

Effects of Temperature and Pressure on Corrosion Behavior of HVOF-Sprayed Fe-Based Amorphous Coating on the Mg-RE Alloy for Dissolvable Plugging Tools

Modeling of the corrosion behavior of B30 alloy in a deep‐sea environment by using the response surface methodology

Stress corrosion cracking of the titanium alloys under hydrostatic pressure resulting from the degradation of passive films

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