Effect of hydrogen on pitting corrosion of 2205 duplex stainless steel under alternating dry/wet marine environment

Li, Gengxin; Du, Min; Wang, Jing; Huang, Guosheng; Li, Ma

doi:10.1016/j.ijhydene.2023.01.210

Cited by 14 publications

(3 citation statements)

References 60 publications

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“…Figure 6 shows the EIS test results of 2205 DSS welded joints in 3.5% NaCl solution under different hydrogen charging conditions. The equivalent circuit diagrams used are shown in Figure 6(c) and (d), where Figure 6(c) is the equivalent circuit diagram for the hydrogen uncharged condition and Figure 6(d) is the equivalent circuit diagram for the hydrogen-charged condition, 8,38 and the results of fitting are shown in Table 5. It can be seen from the results that the Nyquist plots of both hydrogen-charged and uncharged samples show the characteristics of capacitive reactance, indicating that the corrosion is mainly controlled by the charge transfer process.…”

Section: Resultsmentioning

confidence: 99%

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Zheng,

Zhang,

Wang

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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The effect of hydrogen on the pitting susceptibility of 2205 duplex stainless steel welded joints was investigated using metallographic characterisation, electrochemical techniques and immersion experiments. The results show that the diffusible hydrogen content in the welded joints is approximately twice that of base material (BM). Hydrogen significantly decreases the pitting potential (Epit) of the welded joints, while increasing the carrier density in the passive film, suggesting that hydrogen weakens the protective properties of the passive film and increases the pitting susceptibility of the welded joints. According to immersion experiments, the pitting susceptibility of the welded joint from high to low is heat-affected zone (HAZ), BM and weld metal (WM), the HAZ tends to be more prone to the formation of larger and more stable pits, and the number of inclusions at the HAZ is significantly greater than that at the BM and WM. For BM under hydrogen charging, austenite phase is usually corroded first, because hydrogen tends to be enriched in the austenitic phase of BM. However, in some regions of WM, ferrite phase corroded first, which is related to the enrichment of hydrogen in the ferrite in the weld area.

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Section: Resultsmentioning

confidence: 99%

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Zheng,

Zhang,

Wang

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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show abstract

“…During the heat exchange process, a portion of hydrogen atoms will inevitably enter the heat exchanger tubes driven by the concentration gradient, and the absorbed hydrogen atoms increase the pitting corrosion susceptibility of stainless steels and Incoloy alloy (Li et al, 2023a(Li et al, , 2023b. It is well known that pitting corrosion is one of the more destructive and hidden corrosion forms and is a frequently encountered problem in chemical production and marine business (Salah-Rousset et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…To ensure the adequacy of the hydrocracking process, the amount of hydrogen added to the process often exceeds the actual demand. It has been shown in the literature that excessive and prolonged hydrogen is one of the main causes of failure in heat exchanger materials in oil production, such as duplex stainless steels (Li et al, 2023a(Li et al, , 2023b and austenitic stainless steels (Kadoi et al, 2023). The high-temperature Incoloy 825 is also frequently used in the manufacture of hydrogenation heat exchangers because of its excellent corrosion resistance and mechanical properties (Liu et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogen on the pitting corrosion behavior of Incoloy 825

Li,

Yao,

Guan

et al. 2024

ACMM

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Purpose In this paper, the authors aim to study the effect of hydrogen on the pitting corrosion behavior of Incoloy 825, a commonly used material for heat exchanger tubes in hydrogenated heat exchangers. Design/methodology/approach The pitting initiation and propagation behaviors were investigated by electrochemical and chemical immersion experiments and observed and analyzed by scanning electron microscope and energy dispersive spectrometer methods. Findings The results show that hydrogen significantly affects the electrochemical behavior of Incoloy 825; the self-corrosion potential decreased from −197 mV before hydrogen charging to −263 mV, −270 mV and −657 mV after hydrogen charging, and the corrosion current density increased from 0.049 µA/cm2 before hydrogen charging to 2.490 µA/cm2, 2.560 µA/cm2 and 2.780 µA/cm2 after hydrogen charging. The pitting susceptibility of the material increases. Originality/value Hydrogen is enriched on the precipitate, and the pitting corrosion also initiates at that location. The synergistic effect of hydrogen and precipitate destroys the passive film on the metal surface and promotes pitting initiation.

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Investigation into the Mitigation of Crevice Corrosion of Aluminum–Copper Contacts in Seawater by Regulating the Contact Surface Roughness

Chen,

Yin,

Wang

et al. 2024

Adv Eng Mater

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Crevice corrosion for dissimilar metal contacts is a key problem in engineering applications. This work has attempted to prevent the ingress of corrosive media into the crevice between aluminum alloy and copper by controlling the roughness (machining accuracy) of the contact surfaces. Both electrochemical and alternating dry/wet immersion tests were used to investigate the corrosion resistance of aluminum alloy–copper contacts with different contact surface roughness. Considering the relationship between the contact surface roughness and the liquid–solid contact angle and the crevice width, a finite element model based on fluid dynamics theory is established to analyze the effect of the contact surface roughness on the seawater infiltration depth in the contact crevice. The distribution of corrosion products on the aluminum alloy and copper surfaces is observed by optical microscope and scanning electron microscope. The phase composition of the corrosion products is analyzed by X‐ray diffraction technique. The results show that the corrosion resistance of the contact improves as the roughness of the contact surface decreases. This is attributed to the fact that the infiltration of seawater is retarded due to the decrease in the crevice width and increase in the contact angle with the decrease in the contact surface roughness.

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Effect of hydrogen on pitting corrosion of 2205 duplex stainless steel under alternating dry/wet marine environment

Cited by 14 publications

References 60 publications

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Effect of hydrogen on the pitting corrosion behavior of Incoloy 825

Investigation into the Mitigation of Crevice Corrosion of Aluminum–Copper Contacts in Seawater by Regulating the Contact Surface Roughness

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