Aqueous corrosion performance of nanostructured bainitic steel

Kazum, Oluwole; Kannan, M. Bobby; Beladi, Hossein; Timokhina, Ilana; Hodgson, Peter; Khoddam, Shahin

doi:10.1016/j.matdes.2013.08.015

Cited by 37 publications

(23 citation statements)

References 17 publications

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“…The table shows that the polarization resistance of the FSP composite is higher than that of the as-cast NAB. A higher value of R p shows that the specimen has a higher value of corrosion resistance [ 61 , 62 ]. Additionally, in the case of the FSPed composite, the value of corrosion potential is higher and the corrosion current density is lower, indicating better electrochemical corrosion resistance.…”

Section: Resultsmentioning

confidence: 99%

A Study of Erosion–Corrosion Behaviour of Friction Stir-Processed Chromium-Reinforced NiAl Bronze Composite

et al. 2022

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Corrosion is frequently viewed as a catastrophic and unavoidable disaster in marine applications. Every year, a huge cost is incurred on the maintenance and repair of corrosion-affected equipment and machinery. In the marine environment, as-cast nickel–aluminium bronze (NAB) is susceptible to selective phase corrosion. To solve this problem, chromium-reinforced nickel–aluminium bronze was fabricated using the friction stir process (FSP) with improved microstructures and surface properties. A slurry erosion–corrosion test on as-cast and FSPed composites demonstrated that the developed surfaced composite has lower erosion and corrosion rates than the as-cast NAB alloy. The erosion–corrosion rate increased with a decrease in the impact angle from 90° to 30° for both as-cast NAB and prepared composites, exhibiting a shear mode of erosion. The specimens at impact angle 30° experienced more pitting action and higher mass loss compared with those at impact angle 90°. Due to increases in the mechanical properties, the FS-processed composite showed higher erosion resistance than the as-cast NAB alloy. Furthermore, corrosion behaviour was also studied via the static immersion corrosion test and electrochemical measurements under 3.5 wt.% NaCl solution. In a static immersion corrosion test, the FSPed composite outperformed the as-cast NAB composite by a wide margin. The FSPed composite also demonstrated a reduced electrochemical corrosion rate, as revealed by the polarization curve and electrochemical impedance spectroscopic (EIS) data. This reduced rate is attributed to the formation of a Cr oxide film over its surface in the corrosive environment.

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Section: Resultsmentioning

confidence: 99%

A Study of Erosion–Corrosion Behaviour of Friction Stir-Processed Chromium-Reinforced NiAl Bronze Composite

et al. 2022

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“…Östenit fazı üzerinde tane sınırlarının değişmesi sonucu meydana gelen ince östenit polarizasyon akım yoğunluğunu arttırarak korozyonu hızlandırmaktadır [22]. Kalıntı östenitte meydana gelen mikrogalvanik korozyonun seçici çözünmeye neden olmakta [23] ve çeliklerde sıcaklığa bağlı olarak oluşan kalıntı östenit fazının hacmine ve boyutuna bağlı olarak korozyon hızı değişmektedir [24]. Kriyojenik işlem uygulanan N3, N4 ve N5 numunelerinin; EIS yöntemi ile elde edilen Q ve yüzey pürüzlüğü değerleri (n) de R ct değerleri ile aynı oranda değişmektedir.…”

Section: ) Elektrokimyasal Empedans Spektroskopisi (Eis)unclassified

Investigation of the Effect of Deep Cryogenic Treatment with Different Holding Time on the Corrosion Behavior of Cementation Steel

GÜNEY

Kam

Gerengi

et al. 2022

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada sementasyon çeliğinin %3,5 NaCl ortamındaki korozyon davranışına, uygulanan gaz sementasyon, temperleme ve farklı bekletme süreli derin kriyojenik işlemin (-196 °C’de 24, 36, 48 saat) etkisi araştırılmıştır. Beş farklı grupta sınıflandırılan numunelerin korozyon testleri; Elektrokimyasal Empedans Spektroskopisi (EIS) yöntemiyle incelenmiş ve Taramalı Elektron Mikroskobu (SEM) ile metal yüzeyinin ne kadar bozulduğu görsel olarak bakılmış ve Enerji Dağılımlı X-ışını Spektroskopisi (EDS) ile analiz edilmiştir. Bulgular, sementasyon, temperleme ve kriyojenik işlem uygulamalarının sementasyon çeliğinin korozyon hızını azalttığını göstermektedir. Semantasyon işlemi sonrasında 24 saat bekletme süreli derin kriyojenik işlem yapılan N3 numunesinin diğer numunelere göre %3,5 NaCl ortamında çok daha az korozyona uğradığı yapılan elektrokimyasal ve yüzey görüntüleme yöntemleriyle ortaya konulmuştur.

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“…With the increased concentration, the resistance of pure iron at low frequency decreased from about 3000 to 2000 Ω•cm 2 . A time constant is evident at low frequency, probably assigned to a charge transfer process [28]. The equivalent circuit used for modeling the Nyquist plots consisted of electrolyte resistance (R s ), charge-transfer resistance (R ct ) and double layer capacitance (C dl ) ( Figure 5a).…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Effects of Different Ions and Temperature on Corrosion Behavior of Pure Iron in Anoxic Simulated Groundwater

Huang

Feng

et al. 2020

Materials

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As a typical material of the insert in high-level radioactive waste (HLW) geological disposal canisters, iron-based materials will directly contact with groundwater after the failure of a metallic canister, acting as a chemical barrier to prevent HLW leaking into groundwater. In this paper, anoxic groundwater was simulated by mixing 10 mM NaCl and 2 mM NaHCO3 purged by Ar gas (containing 0.3% CO2) with different added ions (Ca2+, CO32− and SiO32−) and operation temperatures (25, 40 and 60 °C). An electrochemical measurement, immersion tests and surface characterization were carried out to study the corrosion behavior of pure iron in the simulated groundwater. The effects of Ca2+ on the corrosion behavior of iron is negligible, however, Cl− plays an important role in accelerating the corrosion activity with the increased concentration and temperature. With increased concentrations of CO32− and SiO32−, the corrosion resistance of iron is largely improved, which is attributed to the formation of a uniform passivation film. The independent effects of temperature on the corrosion behavior of iron are resulted from the repeated passivation–dissolution processes in the formation of the passivation film, resulting from the synergistic effects of CO32−/SiO32− and Cl−. The formation of ferric silicate is dominant in the passivation film with the addition of SiO32−, which effectively protects the iron surface from corrosion.

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Aqueous corrosion performance of nanostructured bainitic steel

Cited by 37 publications

References 17 publications

A Study of Erosion–Corrosion Behaviour of Friction Stir-Processed Chromium-Reinforced NiAl Bronze Composite

A Study of Erosion–Corrosion Behaviour of Friction Stir-Processed Chromium-Reinforced NiAl Bronze Composite

Investigation of the Effect of Deep Cryogenic Treatment with Different Holding Time on the Corrosion Behavior of Cementation Steel

Effects of Different Ions and Temperature on Corrosion Behavior of Pure Iron in Anoxic Simulated Groundwater

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