Study on the Microstructure and Alternating Current Corrosion Behavior of SAF2507 Super-Duplex Stainless Steel in 3.5%NaCl Solution

Zhu, Min; Zhang, Q.; Yuan, Yongfeng; Guo, S.Y.; Chen, Y. B.

doi:10.1007/s11665-020-04624-0

Cited by 9 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The alternating current can decrease the passivation property and damage the passivation film formed on the sample surface. The corrosion rate and pitting sensitivity also increase with the increasing alternating current density [10].…”

Section: Introductionmentioning

confidence: 94%

Role of Cl/F Ions Concentration, pH and Temperature on Pitting Corrosion Behavior of 2507 Duplex Stainless Steel

Liu,

Zhu,

Liu

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In the chemical industry, 2507 duplex stainless steel is usually used for the pipes of absorption tower. The residual F− and Cl− in the tail gas could aggregate in the clean solution of ammonium hydroxide, which causes the risk of pitting corrosion. In this study, the role of Cl/F ions concentration, pH and temperature on the pitting corrosion of 2507 stainless steel is investigated by exposing to actual industrial ammonia desulfurization solution. The experimental results reveal that the 2507 stainless steel exposed the serious corrosion solution appears pitting corrosion problem. However, the 2507 stainless steel is free of pitting corrosion at the tested condition of pH value 3.59/5, temperature 80 °C/100 °C, and ion concentration 46375 ppm/80000 ppm. This study provides a fundamental data for the safety service of stainless steel used in chemical industry.

show abstract

Section: Introductionmentioning

confidence: 94%

Role of Cl/F Ions Concentration, pH and Temperature on Pitting Corrosion Behavior of 2507 Duplex Stainless Steel

Liu,

Zhu,

Liu

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…To further estimate the electrochemical properties between passive film and electrolyte during passivation, Mott-Schottky curves were recorded in Figure 8a. It is presumed that the double-layer capacitance C is functional to the external potential E of n-type semiconductors as revealed in the following equation [40][41][42]: 3. The donor density Nd value dramatically decreases from 5.04 × 10 21 cm −3 at 600 s to 8.07 × 10 20 cm −3 at 7200 s, indicating that the oxides and hydroxides that make up the passive film gradually transform from a loose structure into a more compact structure.…”

Section: Electrochemical Impedance Spectramentioning

confidence: 99%

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Wang

Zhou

et al. 2023

Coatings

View full text Add to dashboard Cite

The relationship between passive film growth behavior and passivation time for plasma-sprayed Fe48Cr15Mo14C15B6Y2 amorphous coating in borate buffer solution has been thoroughly studied. The morphological characteristic and structural feature of as-spayed amorphous coating were estimated by scanning electron spectroscopy (SEM), X-ray diffraction (XRD) and transmission electron spectroscopy (TEM). The influence of passivation time on the film evolution properties was measured by electrochemical impedance spectra (EIS), Mott–Schottky curves, atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS). The results revealed that both corrosion resistance and self-repairing capacity of passive film greatly increased with time based on high electric field assumption. Reductions in donor density and flat band potential were accountable for a lower conductivity of passive film. An increment in Cr2O3 oxide as the inner barrier layer derived from the dehydration reaction of Cr(OH)3 contributed to the gradually densified structure of passive film. The extracted passive film thickness d increment with passivation time t conformed to the logarithm law on the basis of effective capacitance hypothesis: d=0.43lnt+52.06−2.18 (nm). Passivation mechanism within 600 s was ascribed to the adsorption of mechanical mixtures between metal ions and electrolytes, possibly leading to mechanical stress and rupture of passive film in the later growth procedure. The cation vacancy condensation process at the interface of coating/film was propitious in stabilizing the growth rate of passive film.

show abstract

Effects of Cl− and AC on the Corrosion Behavior of 2507 Super Duplex Stainless Steel in a Simulated Concrete Pore Solution

Zhu

Zhang

Yuan

et al. 2020

J. of Materi Eng and Perform

View full text Add to dashboard Cite

Study on the Microstructure and Alternating Current Corrosion Behavior of SAF2507 Super-Duplex Stainless Steel in 3.5%NaCl Solution

Cited by 9 publications

References 45 publications

Role of Cl/F Ions Concentration, pH and Temperature on Pitting Corrosion Behavior of 2507 Duplex Stainless Steel

Role of Cl/F Ions Concentration, pH and Temperature on Pitting Corrosion Behavior of 2507 Duplex Stainless Steel

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Effects of Cl− and AC on the Corrosion Behavior of 2507 Super Duplex Stainless Steel in a Simulated Concrete Pore Solution

Contact Info

Product

Resources

About