Investigation of the effect of solution annealing temperature on critical pitting temperature of 2205 duplex stainless steel by measuring pit solution chemistry

Naghizadeh, Masoumeh; Moayed, Mohammad Hadi

doi:10.1016/j.corsci.2015.01.051

Cited by 48 publications

(33 citation statements)

References 65 publications

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“…To ensure the accuracy of the measurement results, all the corrosion tests were performed three times, and the results suggested that the reproducibility was satisfactory. The magnitudes of the corrosion potential ( E corr ) and corrosion current density ( I corr ) values of the 2205DSS CL are consistent with the results obtained from the electrochemical test of 2205DSS, indicating the feasibility of the method proposed in this work. Figure shows the PDP curves of the CLs and the substrate.…”

Section: Resultssupporting

confidence: 85%

Microstructure and Electrochemical Corrosion Behaviors of Laser‐Cladded 2205 Duplex Stainless Steel

Liu

Huang

Bao

et al. 2020

steel research int.

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Herein, single-pass laser-cladded 2205 duplex stainless steel is fabricated on the surface of Q235 carbon steel at different laser powers in the range of 1.7À2.7 kW. The relationships between laser powers and geometrical characteristics, microstructure, microhardness, and corrosion resistance of the cladded layers (CLs) are analyzed. The results show that with the increase in laser power, the width and height of the bead increase, and the dilution rate and depth of the molten pool also significantly increase. Furthermore, the shape of ferrite gradually transforms from coarse to slender and eventually turns into a discontinuous vermicular shape. It is found that the CL obtained at a laser power of 2.3 kW has higher average microhardness and exhibits better corrosion resistance than the other samples (%20 times better than that of the carbon steel substrate), with its corrosion potential and corrosion current density of À0.146 V and 0.13 μA cm À2 , respectively.

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Section: Resultssupporting

confidence: 85%

Microstructure and Electrochemical Corrosion Behaviors of Laser‐Cladded 2205 Duplex Stainless Steel

Liu

Huang

Bao

et al. 2020

steel research int.

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“…Previous studies reported the CPT of 2205 DSS in NaCl solution at a temperature range of 45-60°C. 12,29,31,35,36 Addition of 0.0005 M Na 2 MoO 4 increases the range of CPT by about 5°C. It might be misinterpreted that the dramatic decline in E b happened at 60°C, however, in this case, the CPT is considered at 50°C due to large error bar which indicates both pitting and transpassivity processes.…”

Section: Resultsmentioning

confidence: 97%

“…However, at temperatures above the CPT, the salt film can precipitate on the pit's surface, which stabilizes pit growth. This model has been successfully used to study the mechanism by which various parameters such as inhibitors (nitrate, 8 dichromate, 9 thiosulfate), 10 surface roughness, 11 and solution annealing temperature 12 can affect the CPT. However, the model cannot predict the exact value of the CPT which is usually measured using flat electrodes.…”

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confidence: 99%

Mechanistic Investigation on the Effect of Molybdate on the Critical Pitting Temperature of 2205 Duplex Stainless Steel

Tavassolian

Moayed

Taji

2019

J. Electrochem. Soc.

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In this research, a mechanistic approach was used to investigate the effect of molybdate ion on the critical pitting temperature (CPT) of 2205 duplex stainless steel. Firstly, the CPT of 2205 DSS was measured using potentiodynamic and potentiostatic polarization. It was found that with addition of 0.0005, 0.005 and 0.05 M Na 2 MoO 4 to 0.5 M NaCl solution, the CPT increases approximately 4, 9, and 14°C, respectively. Using the lead-in pencil electrode technique, the mechanism by which molybdate ion influences the CPT was interpreted using the CPT model proposed by Salinas-Bravo and Newman. The results showed that molybdate has a negligible effect on the pit solution chemistry, resulting in a slight change in the diffusion-limited current density. However, it reduces the rate of alloy dissolution within the simulated pit solution, which was found as a reduced maximum current density.

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“…The effects of microstructural modifications of 2205 DSS on their mechanical and corrosion resistance were intensively investigated in the past. Few works highlighted the changes in corrosion resistance performances that are caused by the phase proportions of austenite and ferrite [7,8]. Several researchers discussed the passive film properties of the 2205 DSS during electrochemical corrosion [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior Difference in Initial Period for Hot-Rolled and Cold-Rolled 2205 Duplex Stainless Steels

Gao

Wang

Sun

et al. 2018

Metals

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Precipitate phases often play an important role on the corrosion resistance of 2205 Duplex stainless steels (DSS). In the present paper, the microstructure and the corrosion resistance of the hot-rolled and cold-rolled 2205 steels aged for different times at 850 • C was investigated through XRD, SEM, and potentiodynamic polarization. It was discovered that the Chi(χ) phase and Sigm(σ) phase were precipitated in turn following the aging treatment of the hot-rolled and cold-rolled steels, but the precipitate amount in the cold-rolled samples was significantly higher when compared to the hot-rolled samples. The corrosion resistance of the solution-annealed cold-rolled samples was similar to the hot-rolled samples, but the corrosion resistance of the cold-rolled sample with precipitate was weaker when compared to the hot-rolled sample following aging treatment. Pitting preferentially initiates in the Cr-depleted region from the σ phase in the aged hot-rolled 2205, becoming increasingly severe during aging for a long lime. Adversely, the initiation of pitting corrosion might occur at the phase boundary, defects, and martensite in the aged cold-rolled 2205. The σ phase was further selectively dissolved through the electrochemical method to investigate the difference in microstructure and corrosion behavior of the hot-rolled and cold-rolled 2205 duplex stainless steels.

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Investigation of the effect of solution annealing temperature on critical pitting temperature of 2205 duplex stainless steel by measuring pit solution chemistry

Cited by 48 publications

References 65 publications

Microstructure and Electrochemical Corrosion Behaviors of Laser‐Cladded 2205 Duplex Stainless Steel

Microstructure and Electrochemical Corrosion Behaviors of Laser‐Cladded 2205 Duplex Stainless Steel

Mechanistic Investigation on the Effect of Molybdate on the Critical Pitting Temperature of 2205 Duplex Stainless Steel

Corrosion Behavior Difference in Initial Period for Hot-Rolled and Cold-Rolled 2205 Duplex Stainless Steels

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