Effect of Dissolved Oxygen on the Corrosion Rate of Stainless Steel in a Sodium Chloride Solution

Рыбалка, К. В.; Бекетаева, Л. А.; Давыдов, А. Д.

doi:10.1134/s1023193518130384

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…Moreover, aerated test solution resulted in a reduced separation between the E corr in the forward (F) loop and the repassivation potential in the reverse loop (B), which suggests a decreased protectiveness of the passive film in the presence of dissolved oxygen. This is consistent with the previous observation of decreased corrosion resistance in the presence of dissolved oxygen [33]. Therefore, it is of vital importance that PWRs operate below a well-defined dissolved oxygen level to maximize the service life of the components.…”

Section: Cyclic Polarizationsupporting

confidence: 92%

Effect of thermal aging on corrosion behavior of duplex stainless steels

et al. 2022

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Despite their exceptional mechanical and corrosion properties, duplex stainless steels (DSS) have not found widespread use in high-temperature applications due to concerns over thermal aging and embrittlement at elevated operational temperatures (> 300 °C). The present study investigated the effect of thermal aging time on the electrochemical properties of lean and standard grade DSS that are exposed to a range of pressurized water reactors containing LiOH and H3BO3. The results indicated that the electrolyte chemistry plays a significant role in the corrosion behavior of the DSS alloys. Corrosion resistance decreased with thermal aging time for all DSS alloys; however, standard grade DSS (2205 and 2209-w) alloys showed better corrosion resistance than lean grades (2003, 2101, 2101-w). The presence of dissolved oxygen in the electrolytes resulted in a significant increase in corrosion rate for the DSS alloys, but it did not affect the general trend of corrosion rates with aging time. All DSS alloys became vulnerable to pitting corrosion due to chloride addition, but the pitting resistance decreased with increasing thermal aging time. Increased boron B content resulted in degradation of corrosion resistance of the DSS alloys, while minor changes in pH did not show a significant change in corrosion resistance. Mechanical and metallurgical characterization coupled with electrochemical characterization of the DSS alloys gave a comprehensive insight into the effects of thermal aging on the electrochemical response of the DSS. Graphical abstract

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Section: Cyclic Polarizationsupporting

confidence: 92%

Effect of thermal aging on corrosion behavior of duplex stainless steels

et al. 2022

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“…The corrosion rate of carbon steel pipe was affected significantly by dissolved oxygen in the solution. It was even reported that internal corrosion of water pipes can be prevented by reducing DO concentrations [26] and others reported that DO greatly affects the corrosion rate [28][29][30][31]. Liquid corrosivity is not only a function of dissolved oxygen but also influenced by other factors.…”

Section: Fig 2 Corrosion Rate Versus Exposure Timementioning

confidence: 99%

Corrosion rate and corrosion behaviour analysis of carbon steel pipe at constant condensed fluid

Royani¹,

Prifiharni²,

Priyotomo³

et al. 2021

Metall Mater Eng

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This study investigates the corrosion rate and corrosion behavior of carbon steel pipe at constant condensed fluid from a geothermal power plant. The corrosion rate of the steel was determined by weight loss analysis, whereas the corrosivity of the condensate fluids was measured by a multimeter Hach HQ40d. The morphology of the corrosion products formed was characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and x-ray diffraction (XRD) analysis. Results showed that the corrosion rate in the liquid part of the condensate fluids is constant during the immersion period when water quality parameters are constant. Meanwhile, the corrosion rate of low carbon steel pipe decreases though with the longer exposure period in the condensate fluid. The decrease of metal corrodibility identical to the lower corrosion rate at a longer exposure time due to the protective corrosion layer formed. The corrosion products during immersion tests identified in the corrosion test were uniform with iron oxide in the form of FeO(OH) and Fe2O3*H2O.

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