Critical temperature determination of detectable Cr diffusion enhancement by nanostructure through structural evolution analysis of the oxide films at 25–450 °C on 304 stainless steel

Gui, Yong; Meng, Xianqin; Zheng, Zhaohui; Gao, Yan

doi:10.1016/j.apsusc.2017.04.133

Cited by 24 publications

(7 citation statements)

References 51 publications

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“…Figure 6 depicts Ti and O atomic percentages varying with sputtering depth of each sample. The thickness of the anodic oxide films can be calculated by the XPS depth profiles at the point where the oxygen-atoms concentration dropped to 50% of its maximum value [33,34], in which case the value is calculated to be about 35%. Figure 6a shows that the thickness of anodic oxide film formed on 10 V is about 80 nm.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Potential on Surface Characteristic and Corrosion Resistance of Anodic Oxide Film Formed on Commercial Pure Titanium at the Potentiodynamic-Aging Mode

Zhang¹,

Duan²,

Gao³

et al. 2019

Materials

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Anodic oxidation treatment of commercially pure titanium was carried out at the voltages of 10, 30, 50 V in 0.5 M H2SO4 solution at the potentiodynamic-aging mode so as to obtain the effects of the anodic potential on the surface characteristic and corrosion resistance of the anodic oxide film. The influences of potential on the surface morphology, the roughness, the crystalline behavior, the chemical composition and the corrosion resistance of the anodic oxide films were investigated by using scanning electron microscopy (SEM), atomic force microscope (AFM), Raman spectrum, X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), potentiodynamic polarization curves and electrode impedance spectroscopy (EIS). The results show that increasing anodic potential at the potentiodynamic-aging mode can significantly enhance thickness, flatness, crystallization, chemical stability, and corrosion resistance of anodic oxide film.

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Section: Resultsmentioning

confidence: 99%

The Effect of Potential on Surface Characteristic and Corrosion Resistance of Anodic Oxide Film Formed on Commercial Pure Titanium at the Potentiodynamic-Aging Mode

Zhang¹,

Duan²,

Gao³

et al. 2019

Materials

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“…Furthermore, referring to the Figure 9-Figure 16, a double oxide layer was observed at the corrosion interface. An Inner Cr-rich oxides film acts as protective layer against corrosion because of low diffusion rate of oxygen and metal ions through the film (Gui et al, 2017) and outer Fe-rich layer protect the dissolution of the inner Cr-rich oxide into salt. The diffusion order of metal ions in Cr-oxides is DFe>DNi>DCr (Lobnig et al, 1992).…”

Section: Discussionmentioning

confidence: 99%

The corrosion behaviour of stainless steels and Ni-based alloys in nitrate salts under thermal cycling conditions in concentrated solar power plants

et al. 2022

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“…The corrosion resistance of stainless steels have been widely studied in water under widely varying conditions. Gui, et al studied the temperature dependence of corrosion resistance in SUS304 in a range of temperatures from 25 °C to 450 °C with both coarse grains and nanocrystalline grains [23].…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that above 300 °C the chromium oxide passivation layer becomes comparatively thin due to an enhancement of chromium diffusion along grain boundaries [23]. Several researchers have investigated corrosion properties of SUS304 in supercritical water (SCW) and reported that the SUS304 exhibited no significant susceptibility to corrosion or stress corrosion cracking (SCC) in SCW when the average grain size was small and/or when nanoparticles existed [19,24,25].…”

Section: Introductionmentioning

confidence: 99%

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2018

Int J Metall Met Phys

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A mechanically alloyed austenitic stainless steel (MA304LZ) was produced from pre-alloyed SUS304L powder with a small amount of zirconium addition. Coupon-type specimens of MA304LZ and SUS304L steels were subjected to hot water at 300 °C/25 MPa and supercritical pressurized water (SCW) at 500 °C/25 MPa for 1000 hr. MA304LZ is significantly less susceptible to corrosion weight gain in SCW than SUS304L which follows the parabolic rule between weight gain and elapsing time. The reduction of weight gain in MA304LZ can be attributed to much smaller grains which enhance chromium diffusion through grain boundaries and consequently accelerate the formation of a protective chromium oxide layer. Nickel oxides were observed in SUS304L but not in MA304LZ after the test at 500 °C. It is considered that zirconium addition suppresses nickel diffusion as well as oxygen diffusion because of the strong interaction of zirconium/nickel and zirconium/oxygen. Electrochemical potentiodynamic reactivation (EPR) measurement of the degree of sensitization (DOS) of annealed and non-annealed samples indicates that both steels were resistant to sensitization of grain boundary corrosion. However, the annealing of MA304LZ at 1050 °C diminishes the beneficial grain size effect of MA304LZ.

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Critical temperature determination of detectable Cr diffusion enhancement by nanostructure through structural evolution analysis of the oxide films at 25–450 °C on 304 stainless steel

Cited by 24 publications

References 51 publications

The Effect of Potential on Surface Characteristic and Corrosion Resistance of Anodic Oxide Film Formed on Commercial Pure Titanium at the Potentiodynamic-Aging Mode

The Effect of Potential on Surface Characteristic and Corrosion Resistance of Anodic Oxide Film Formed on Commercial Pure Titanium at the Potentiodynamic-Aging Mode

The corrosion behaviour of stainless steels and Ni-based alloys in nitrate salts under thermal cycling conditions in concentrated solar power plants

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