Corrosion Behaviour of Type 316L Stainless Steel in Hot Caustic Aqueous Environments

Davalos-Monteiro, Raul; Wetering, Jan van de; Krawczyk, Benjamin; Engelberg, Dirk

doi:10.1007/s12540-019-00403-2

Cited by 27 publications

(13 citation statements)

References 33 publications

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“…The formation of the hydroxide layer is believed to be the result of the continuous diffusion of metallic cations from the bulk toward the film surface. The depassivation peak observed in the PD measurements (Figure b and Table ) at around 0.1 V vs Ag/AgCl corresponds to the potential region where Cr 2 O 3 is further oxidized to CrO 4 2– . , This implies that the passive film is first dissolved in the electrolyte and then reformed. For low Fe-containing films, this depassivation occurs at higher potentials and a small second peak can be observed at around 0.4 V just before the transpassive region.…”

Section: Discussionmentioning

confidence: 94%

“…One way to tackle this issue is to add an electrocatalyst for water recombination. However, alkaline batteries are considered harsh and corrosive environments because of their high hydroxide concentration and caustic properties, , thus the batteries rely on corrosion-resistant materials for their durability. The corrosion resistance of metals is often achieved by their protective oxide on their surfaces, also known as the passive layer …”

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Linder

Rao

Boyd

et al. 2022

ACS Appl. Energy Mater.

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Corrosion resistance and catalytic activity toward the oxygen reduction reaction (ORR) in an alkaline environment are two key properties for water recombination applications. In this work, CoCrFe x Ni (0 ≤ x ≤ 0.7) thin films were deposited by magnetron sputtering on polished steel substrates. The native passive layer was 2–4 nm thick and coherent to the columnar grains determined by transmission electron microscopy. The effect of Fe on the corrosion properties in 0.1 M NaCl and 1 M KOH and the catalytic activity of the films toward ORR were investigated. Electrochemical impedance spectroscopy and potentiodynamic polarization measurements indicate that CoCrFe0.7Ni and CoCrFe0.3Ni have the highest corrosion resistance of the studied films in NaCl and KOH, respectively. The high corrosion resistance of the CoCrFe0.7Ni film in NaCl was attributed to the smaller overall grain size, which leads to a more homogeneous film with a stronger passive layer. For CoCrFe0.3Ni in KOH, it was attributed to a lower Fe dissolution into the electrolyte and the build-up of a thick and protective hydroxide layer. Scanning Kelvin probe force microscopy showed no potential differences globally in any of the films, but locally, a potential gradient between the top of the columns and grain boundaries was observed. Corrosion of the films was likely initiated at the top of the columns where the potential was lowest. It was concluded that Fe is essential for the electrochemical activation of the surfaces and the catalytic activity toward ORR in an alkaline medium. The highest catalytic activity was recorded for high Fe-content films (x ≥ 0.5) and was attributed to the formation of platelet-like oxide particles on the film surface upon anodization. The study showed that the combination of corrosion resistance and catalytic activity toward ORR is possible for CoCrFe x Ni, making this material system a suitable candidate for water recombination in an alkaline environment.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Linder

Rao

Boyd

et al. 2022

ACS Appl. Energy Mater.

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“…The nature of the semiconductor of the film layer formed on DSS influenced its corrosion resistance 38 , and the type of semiconductor and the carrier density of the film layer affected the rupture of the film layer and pitting of DSS 39 , 40 , where the capacitance C and potential E of the film layer met the M-S relationship, the semiconductor space charge was calculated 41 as follows:…”

Section: Resultsmentioning

confidence: 99%

Electrochemical behavior of 2205 duplex stainless steel in simulated solution containing high concentration Cl− and saturated CO2 at different temperatures

Zhu

Xian

et al. 2022

Sci Rep

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Abstract2205 duplex stainless steel (DSS) has good corrosion resistance due to its typical duplex organization, but the increasingly harsh CO2-containing oil and gas environment leads to different degrees of corrosion, especially pitting corrosion, which seriously threatens the safety and reliability of oil and gas development. In this paper, the effect of temperature on the corrosion behavior of 2205 DSS in a simulated solution containing 100 g/L Cl− and saturated CO2 was investigated with immersion tests and electrochemical tests and combined with characterization techniques such as laser confocal microscopy and X-ray photoelectron spectroscopy. The results show that the average critical pitting temperature of 2205 DSS was 66.9 °C. When the temperature was higher than 66.9 °C, the pitting breakdown potential, passivation interval, and self-corrosion potential decreased, while the dimensional passivation current density increased, and the pitting sensitivity was enhanced. With a further increase in temperature, the capacitive arc radius of 2205 DSS decreased, the film resistance and charge transfer resistance gradually decreased, the carrier density of the donor and acceptor in the product film layer with n + p bipolar characteristics also increased and the inner layer of the film with Cr oxide content decreased, while the outer layer with Fe oxide content increased, the dissolution of the film layer increased, the stability decreased, and the number and pore size of pits increased.

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“…This result fully agrees with corrosion rates obtained by the potentiodynamic polarization tests described in the following section. [37,38]. It seems that the K5 sample has a wider passive region than other samples.…”

Section: Open Circuit Potential (Ocp)mentioning

confidence: 91%

Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application

Basori

Mohamad

Mansor

et al. 2023

J. Electrochem. Sci. Eng.

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Hydrogen production could be enhanced by increasing the potassium hydroxide (KOH) concentration, but higher KOH concentrations result in higher corrosion rates. Therefore, a deep investigation of the electrochemical behavior of stainless steel (SS 316L) in the KOH solution is needed. This study investigates the influence of KOH concentrations on the electrochemical behavior, surface morphology, structure, and sample phases of SS 316L. The investigations were conducted by some electrochemical techniques, UV-vis, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD). The corrosion rate was found to increase, and solution resistance to decrease with increasing KOH concentration. Samples tested in 5, 30, and 50 g l-1 of KOH showed corrosion rates of 0.457, 2.362, and 5.613 µm year-1, respectively. A wide passive region and the noblest pitting potential were noticed for the sample with 5 g l-1 of KOH. Moreover, Mott-Schottky plots and characteristic wavelengths of UV-Vis suggest the formation of iron and chromium oxides by the passivation of samples. The SEM analysis showed a dynamic change of surface morphology from the lowest to the highest concentration with the intergranular corrosion found at the grain boundaries area. In conclusion, concentrations < 50 g l-1 KOH could be recommended since they would support the optimum remaining life of SS 316 L plates in HHO generators.

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Corrosion Behaviour of Type 316L Stainless Steel in Hot Caustic Aqueous Environments

Cited by 27 publications

References 33 publications

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Electrochemical behavior of 2205 duplex stainless steel in simulated solution containing high concentration Cl− and saturated CO2 at different temperatures

Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application

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Corrosion Behaviour of Type 316L Stainless Steel in Hot Caustic Aqueous Environments

Cited by 27 publications

References 33 publications

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFexNi (0 ≤ x ≤ 0.7) Thin Films

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFexNi (0 ≤ x ≤ 0.7) Thin Films

Electrochemical behavior of 2205 duplex stainless steel in simulated solution containing high concentration Cl− and saturated CO2 at different temperatures

Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application

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Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films