Electrochemical and SVET Studies on the Typical Polarity Reversal of Cu–304 Stainless Steel Galvanic Couple in Cl−-Containing Solution with Different pH

Ni, Qingzhao; Xia, Xiaojian; Zhang, Junxi; Dai, Nianwei; Fan, Yadong

doi:10.1016/j.electacta.2017.07.020

Cited by 22 publications

(10 citation statements)

References 38 publications

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“…The i g of Ti60‐H62 galvanic coupling shows a periodical fluctuation from positive to negative during the whole measurement time, but the amplitude gradually decreases and the baselines move from positive to zero. The fluctuation of i g is related to the change of the electrode surface state . The i g value indicates that the galvanic corrosion of Ti60‐H62 galvanic coupling is negligible.…”

Section: Resultsmentioning

confidence: 99%

Effect of passive film on the galvanic corrosion of titanium alloy Ti60 coupled to copper alloy H62

Zhao

Song

Dong

et al. 2019

Materials & Corrosion

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Ti alloys exhibit high potential because of the compact passive film. However, the effect of passive film on galvanic corrosion is not clear. On the one hand, the great potential difference can accelerate the galvanic corrosion of other metals with low potential. On the other hand, the passive film can hinder the electrochemical reactions, inhibiting the galvanic corrosion. To clarify this question, the galvanic corrosion of titanium alloy Ti60 coupled to copper alloy H62 was studied using zero-resistance ammeter, scanning vibrating electrode technique, scanning electron microscopy, and potentiodynamic polarization measurements. The chemical composition and electrical properties of the passive film on Ti60 were detected using X-ray photoelectron spectroscopy and Mott-Schottky plots. The results indicate the galvanic corrosion of Ti60-H62 coupling is ignorable in spite of the great galvanic potential difference between them. It can be attributed to the low electron donor density of passive film, which inhibits the electron charge transfer process at the film/solution interface, causing the slow cathodic reaction rate on Ti60.

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Section: Resultsmentioning

confidence: 99%

Effect of passive film on the galvanic corrosion of titanium alloy Ti60 coupled to copper alloy H62

Zhao

Song

Dong

et al. 2019

Materials & Corrosion

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“…In the SG + CaCl 2 solution (Figure 1a), the curves are very similar, characterized as active dissolution control in both the anodic and cathodic areas. The anodic polarization curves appear in the active dissolution region, but are without occurrence in the passivation region [26,27]. Both the SG and CaCl 2 solutions contain active Cl − , which easily destroys the protective oxide film formed on the iron surface and triggers the dissolution of the iron, further accelerating the electrochemical corrosion activity.…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

Effects of Different Ions and Temperature on Corrosion Behavior of Pure Iron in Anoxic Simulated Groundwater

Huang

Feng

et al. 2020

Materials

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As a typical material of the insert in high-level radioactive waste (HLW) geological disposal canisters, iron-based materials will directly contact with groundwater after the failure of a metallic canister, acting as a chemical barrier to prevent HLW leaking into groundwater. In this paper, anoxic groundwater was simulated by mixing 10 mM NaCl and 2 mM NaHCO3 purged by Ar gas (containing 0.3% CO2) with different added ions (Ca2+, CO32− and SiO32−) and operation temperatures (25, 40 and 60 °C). An electrochemical measurement, immersion tests and surface characterization were carried out to study the corrosion behavior of pure iron in the simulated groundwater. The effects of Ca2+ on the corrosion behavior of iron is negligible, however, Cl− plays an important role in accelerating the corrosion activity with the increased concentration and temperature. With increased concentrations of CO32− and SiO32−, the corrosion resistance of iron is largely improved, which is attributed to the formation of a uniform passivation film. The independent effects of temperature on the corrosion behavior of iron are resulted from the repeated passivation–dissolution processes in the formation of the passivation film, resulting from the synergistic effects of CO32−/SiO32− and Cl−. The formation of ferric silicate is dominant in the passivation film with the addition of SiO32−, which effectively protects the iron surface from corrosion.

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“…SVET is an effective method and is widely used to monitor the localized corrosion of the surface of carbon steel; it not only provides a map of the ion currency generated by corrosion, but also illustrates the progress of corrosion with time. 39,40 A variation of ion currency indicates a change in the corrosion reaction process; therefore, conversely, the corrosion process can be characterized by ion currency. Fig.…”

Section: Svet Analysismentioning

confidence: 99%

Molecule adsorption and corrosion mechanism of steel under protection of inhibitor in a simulated concrete solution with 3.5% NaCl

et al. 2018

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Electrochemical and SVET Studies on the Typical Polarity Reversal of Cu–304 Stainless Steel Galvanic Couple in Cl−-Containing Solution with Different pH

Cited by 22 publications

References 38 publications

Effect of passive film on the galvanic corrosion of titanium alloy Ti60 coupled to copper alloy H62

Effect of passive film on the galvanic corrosion of titanium alloy Ti60 coupled to copper alloy H62

Effects of Different Ions and Temperature on Corrosion Behavior of Pure Iron in Anoxic Simulated Groundwater

Molecule adsorption and corrosion mechanism of steel under protection of inhibitor in a simulated concrete solution with 3.5% NaCl

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