Corrosion resistance study of Fe–Mn–Al–C alloys using immersion and potentiostatic tests

Lins, Vanessa de Freitas Cunha; Freitas, Marta Afonso; Silva, Evando M Paula e

doi:10.1016/j.apsusc.2004.12.040

Cited by 24 publications

(14 citation statements)

References 12 publications

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“…11). It is in good accordance with the data reported by other authors (Ref 7,8), which identified corrosion pits in different high-manganese steels after polarization tests in chloride solution. The density of corrosion pits and corrosion products at the surface after the corrosion test in the chloride medium is lower when compared to the acid solution.…”

Section: Corrosion Damagesupporting

confidence: 93%

Microstructure and Corrosion Behavior of Hot-Deformed and Cold-Strained High-Mn Steels

Grajcar

Kciuk

Topolska

et al. 2016

J. of Materi Eng and Perform

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The electrochemical corrosion properties of 26Mn-3Si-3Al and 27Mn-4Si-2Al austenitic steels in two different states were studied in 0.1 M H 2 SO 4 and 3.5% NaCl using potentiodynamic polarization tests. The effect of cold deformation on the microstructure and corrosion behavior of steels was analyzed. In acid solution, both steels exhibited lower corrosion resistance than in chloride solution independently on the steel state (hot-rolled, cold-worked). Cold deformation decreases the corrosion resistance, though this effect is smaller than the effect of chemical composition related to the combined Al + Si addition. All steels showed the evidence of pitting corrosion. The intensive dissolution of Fe and Mn takes place in the acid medium.

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Section: Corrosion Damagesupporting

confidence: 93%

Microstructure and Corrosion Behavior of Hot-Deformed and Cold-Strained High-Mn Steels

Grajcar

Kciuk

Topolska

et al. 2016

J. of Materi Eng and Perform

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“…It was found that additions of Al and Cr improve the corrosion resistance of high-Mn steels. [1][2][3] This is due to the passive-filmforming tendency of the steel surface. It is reported that a silicon addition to steel decreases its corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermomechanical treatment on the corrosion behaviour of Si-and Al-containing high-Mn austenitic steel with Nb and Ti micro-additions

Grajcar¹,

Płachcińska²,

Topolska³

2015

Mater. Tehnol.

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The corrosion behavior of the 27Mn-4Si-2Al type austenitic steel micro-alloyed with Nb and Ti was evaluated in acidic 0.1 M H2SO4 and chloride 3.5 % NaCl environments using potentiodynamic polarization tests. The corrosion properties of solution-treated specimens were compared to thermomechanically processed specimens. In the acidic solution, the steel exhibited a lower corrosion resistance than in the chloride solution, independently of the heat treatment applied. SEM and light micrographs confirmed that the corrosion attack in the acidic solution was higher when compared to the chloride solution. The steel showed evidence of pitting and uniform corrosion in both the acidic and chloride solutions. The corrosion resistance of supersaturated specimens in both 0.1 M H2SO4 and 3.5 % NaCl media was lower when compared to the thermomechanically treated specimens. It was found that the corrosion behavior of the examined high-Mn steel depends on the passivation tendency of the alloying elements (Mn, Al) and the grain size. Keywords: high-Mn steel, austenitic steel, corrosion resistance, passivity, thermomechanical treatment, potentiodynamic polarization test Korozijsko vedenje avstenitnega jekla 27Mn-4Si-2Al, mikrolegiranega z Nb in Ti je bilo ocenjeno v kislem 0,1 M H2SO4 in v kloridnem okolju 3,5 % NaCl, s potenciodinami~nim polarizacijskim preizkusom. Korozijske lastnosti raztopno`arjenih vzorcev so bile primerjane s termomehansko izdelanimi vzorci. V kisli raztopini so bili vzorci manj korozijsko odporni kot v kloridni raztopini, neodvisno od uporabljene toplotne obdelave. SEM in svetlobni posnetki so potrdili, da je bil napad korozije v primerjavi s kloridno raztopino izrazitej{i v kisli raztopini. Na jeklu so bili dokazi za jami~asto in splo{no korozijo v obeh raztopinah, kisli in bazi~ni. Korozijska odpornost prenasi~enih vzorcev v 0,1 M H2SO4 in v 3,5 % NaCl je bila manj{a v primerjavi s termomehansko obdelanimi vzorci. Ugotovljeno je, da je korozijsko vedenje preiskovanega visokomanganskega jekla odvisno od nagnjenosti k pasivaciji legirnih elementov (Mn, Al) in od velikosti zrn.

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“…It was reported that high-Mn steels show the lowest corrosion resistance in solutions of pH about 1 [14][15][16]. These steels are less sensitive to corrosion attack in solutions of pH about 14.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Kozłowska

Grajcar

2016

Archives of Materials Science and Engineering

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Purpose: The aim of the paper is to compare the corrosion properties of two high-Mn austenitic steels with various Al and Si additions in 0.1M NaOH solution using a potentiodynamic method. Design/methodology/approach: The steels used for the investigation were thermomechanically rolled in 3 passes. The final thickness of about 2 mm was obtained at a temperature of 850°C. Three groups of samples were prepared: thermomechanically rolled, thermomechanically rolled and additionally annealed at 900°C for 20 min, thermomechanically rolled and additionally cold deformed in static tensile test to total elongation of 36%. Corrosion resistance of investigated steels was examined using the potentiodynamic method. The metallographic inspection of corrosion damage included scanning electron microscope observations. The chemical analyses of the corrosion pits were carried out using EDS techniques. Findings: It was found that X4MnSiAlNbTi27-4-2 and X6MnSiAlNbTi26-3-3 steels were characterized by relatively high corrosion resistance in 0.1M NaOH solution independently of their state. EDS analysis revealed that corrosion pits nucleated preferentially at nonmetallic inclusions such as MnS and AlN. Results of potentiodynamic tests showed that cold deformation had the highest influence on decreasing the corrosion resistance of investigated steels. Thermomechanically treated and supersaturated specimens showed lower values of corrosion current density and consequently less amount of corrosion damage. Research limitations/implications: To investigate in more detail the corrosion behaviour of high-manganese austenitic steels, the impedance spectroscopy investigations will be carried out. Practical implications: The knowledge of the corrosion resistance of high-Mn steels has a significant effect on their industrial application in the automotive industry. Originality/value: The corrosion resistance of two high-manganese austenitic steels with different initial microstructures was compared in alkaline solution.

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Corrosion resistance study of Fe–Mn–Al–C alloys using immersion and potentiostatic tests

Cited by 24 publications

References 12 publications

Microstructure and Corrosion Behavior of Hot-Deformed and Cold-Strained High-Mn Steels

Microstructure and Corrosion Behavior of Hot-Deformed and Cold-Strained High-Mn Steels

Effect of thermomechanical treatment on the corrosion behaviour of Si-and Al-containing high-Mn austenitic steel with Nb and Ti micro-additions

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