NITRIC ACID RESISTANCE OF NEW TYPE Fe-Mn-Al STAINLESS STEELS

Hamada, Atef; Karjalainen, L.P.

doi:10.1179/cmq.2006.45.1.41

Cited by 16 publications

(19 citation statements)

References 23 publications

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“…For the samples exposed to the chloride environment shown in Figure 4 , the most active alloy was the TWIP1 due to the severe pitting corrosion exhibited. This can be explained by the lower contents of Mo and Si that this alloy contains; Si imparts passivity by the formation of intermetallic materials, such as Fe 3 Al-Si, and increases the E pit , as well as extending the passive region [ 21 , 22 ]. In addition, molybdenum alloying modifies the polarity of passive film by generating molybdates and also creates a bipolar interface that promotes repassivation by the deactivation of pit growth.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the content of Al and Si alloying elements affects pitting corrosion; pitting is hindered as the content of these elements increases. The presence of Al imparts better corrosion protection, developing a stable and compact passive oxide layer (Al 2 O 3 ) that hinders the electrode reaction [ 21 , 22 ]. The presence of Si alloying element (2.8 wt.%) promotes the formation of a passive layer containing fine grains, decreasing the corrosion rate as the Si content increases (up to 3%).…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions

et al. 2021

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The corrosion behavior of austenitic Fe–Mn–Al–Cr–C twinning-induced plasticity (TWIP) and microband-induced plasticity (MBIP) steels with different alloying elements ranging from 22.6–30 wt.% Mn, 5.2–8.5 wt.% Al, 3.1–5.1 wt.% Cr, to 0.68–1.0 wt.% C was studied in 3.5 wt.% NaCl (pH 7) and 10 wt.% NaOH (pH 14) solutions. The results obtained using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, alongside optical microscopy analysis, revealed pitting as the dominant corrosion mechanism in high-Mn TWIP steels. An X-ray diffraction analysis of the surface revealed that the main corrosion products were hematite (Fe2O3), braunite (Mn2O3), and hausmannite (Mn3O4), and binary oxide spinels were also identified, such as galaxite (MnAl2O4) and jacobsite (MnFe2O4). This is due to the higher dissolution rate of Fe and Mn, which present a more active redox potential. In addition, a protective Al2O3 passive film was also revealed, showing enhanced corrosion protection. The highest corrosion susceptibility in both electrolytes was exhibited by the MBIP steel (30 wt.% Mn). Pitting corrosion was observed in both chloride and alkaline solutions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions

et al. 2021

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“…New generations of high manganese (15∼30 wt% Mn) austenitic steels (HMS) show a desired combination of high strength and ductility and therefore are interesting for the automotive industry 1–8. The preferred properties can be achieved by two different deformation mechanisms: Transformation Induced Plasticity (TRIP) und Twinning Induced Plasticity (TWIP).…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature, Strain rate, Manganese and Carbon Content on flow Behavior of three Ternary Fe‐Mn‐C (Fe‐Mn23‐C0.3, Fe‐Mn23‐C0.6, Fe‐Mn28‐C0.3) High‐Manganese Steels

Wietbrock

Xiong

Bambach�

et al. 2010

steel research int.

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In this work compression tests were performed to characterize the flow behavior of three different high manganese austenitic steels (HMS) in dependence of temperature (300–1200 °C) and strain rate (0.1‐10 s−1). True stress‐true strain curves were calculated from the experimental data. Temperature compensation was applied to remove the effects of adiabatic heating. At 300 °C the influence of strain rate is small but rapidly increases with temperature. DRX can be observed above 1100 °C for all HMS with 23 wt% Mn starting from the smaller strain rates. Higher Mn contents seem to promote DRX which occurs first for a 28 wt% Mn steel at 1000°C. While an increasing Mn content decreases the maximum flow stress at smaller temperatures, the opposite is found at temperatures above 700 °C. Carbon influences the stress‐strain curves mainly at temperatures below 700 °C as it raises the maximum stress levels. At temperatures above 1100 °C all three investigated HMS show similar flow curves. By increasing the temperature from 300 °C to 1200 °C the initial flow stresses are reduced by a factor of ten. The maximum flow stress levels are decreased by a factor of eight (Fe‐Mn28‐C0.3), ten (Fe‐Mn23C0.3) and eleven (Fe‐Mn23C0.6).

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“…Despite that some of the Fe-Mn-Al-C steels showed a close response as SS. With this concern, during the last years, several researches have been using coatings, thermal treatments, and alloy additions to increase corrosion resistance of the Fe-Mn-Al-C steels [250,[288][289][290][291][292][293][294][295][296][297][298], or apply anodic passivation currents to promote thick, protective and stable passive films [299]. These new strategies have been shown promising results.…”

Section: Electrochemical Corrosiónmentioning

confidence: 99%

A general perspective of Fe–Mn–Al–C steels

Zambrano

2018

J Mater Sci

175

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During the last years, the scientific and industrial community have focused on the astonishing properties of Fe-Mn-Al-C steels. These high advanced steels allow high-density reductions about ~18% lighter than conventional steels, high corrosion resistance, high strength (ultimate tensile strength (UTS) ~1 Gpa) and at the same time ductility above 60%.The increase of the tensile or yield strength and the ductility at the same time is almost a special feature of this kind of new steels, which makes them so interesting for many applications such as in the automotive, armor and mining industry. The control of these properties depends on a complex relationship between the chemical composition of the steel, the test temperature, the external loads and the processing parameters of the steel. This review has been conceived to tried to elucidate these complex relations and gather the most important aspects of Fe-Mn-Al-C steels developed so far.

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NITRIC ACID RESISTANCE OF NEW TYPE Fe-Mn-Al STAINLESS STEELS

Cited by 16 publications

References 23 publications

Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions

Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions

Effect of Temperature, Strain rate, Manganese and Carbon Content on flow Behavior of three Ternary Fe‐Mn‐C (Fe‐Mn23‐C0.3, Fe‐Mn23‐C0.6, Fe‐Mn28‐C0.3) High‐Manganese Steels

A general perspective of Fe–Mn–Al–C steels

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