Comparison of the corrosion of bulk amorphous steel with conventional steel

Gostin, Petre Flaviu; Gebert, A.; Schultz, L.

doi:10.1016/j.corsci.2009.09.016

Cited by 85 publications

(25 citation statements)

References 18 publications

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“…Farmer et al [4] 2.5 and show that the corrosion resistance of these alloys can outperform that of wrought alloy 22 in seawater at temperatures up to 90ºC. Gostin et al [5] have shown that the corrosion resistance of the amorphous form of (Fe 44 98.55 Y 1.5 is superior to that of the crystalline form in chloride solutions and in acid, though a pH dependence is noted with the amorphous structure being of no benefit in highly alkaline solutions.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Bakare

Voisey

Chokethawai

et al. 2012

Journal of Alloys and Compounds

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The corrosion behaviour of both crystalline and largely amorphous forms of the Fe-based glass forming alloy, Fe 43 Cr 16 Mo 16 C 15 B 10 alloy was investigated. Two different methods were used to induce transformation to the amorphous form of the alloy: laser melting and HVOF spraying. Both methods produced largely amorphous material, however the high brittleness of the alloy makes it susceptible to cracking during laser treatment, hence this technique is not suitable for largescale application. Potentiodynamic scanning showed that in 0.5M H 2 SO 4 and 3.5% NaCl electrolytes both amorphous forms of the alloy had better corrosion resistance (lower current densities for -200 to +1000mV SCE) compared to the crystalline material. The laser treated material and HVOF coating performed similarly in 3.5% NaCl. In 0.5M H 2 SO 4 the HVOF coating had a lower current density than the laser melted material for almost all of the potential range -300 to +1000mV SCE. The improved corrosion behaviour of the largely amorphous material is attributed to its homogeneity, and particularly to the elimination of the Mo-rich phase that underwent preferential corrosion in the crystalline form of the material.

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Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Bakare

Voisey

Chokethawai

et al. 2012

Journal of Alloys and Compounds

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“…Metallic glasses are in general acknowledged by their high mechanical strength and toughness [1][2][3][4][5] coupled to high corrosion resistance for some alloy compositions [6,7]. These unique properties provided by the amorphous structure and metallic bonding attracted increasing attention of researchers, material scientists and industries due to their great potential for basic science research and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and crystallization path of a Fe-based metallic glass alloy

et al. 2017

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The thermal stability and the quantification of the different transformation processes involved in the overall crystallization of the Fe50Cr15Mo14C15B6 amorphous alloy were investigated by several characterization techniques. Formation of various metastable and stable phases during the devitrification process in the sequence α-Fe, χ-Cr6Fe18Mo5, M23(C,B)6, M7C3, η-Fe3Mo3C and FeMo2B2 (with M=Fe, Cr, Mo), was observed by in-situ synchrotron high energy X-ray diffraction and in-situ transmission electron microscopy. By combining these techniques with differential scanning calorimetry data, the crystallization states and their temperature range of stability under continuous heating were related with the evolution of the crystallized fraction and the phase sequence as a function of temperature, revealing structural and chemical details of the different transformation mechanisms.

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“…For instance, the ability to sustain plastic strain is negligible for Cr contents above 10 at.% [4]. However, all the corrosion studies of this system have been performed with compositions with a relatively large amount of Cr (from 15 at% in [6][7][8] and from 7.5 at% in [9]). …”

Section: Introductionmentioning

confidence: 99%

“…In particular, the Fe-Cr-Mo-C-B system is widely studied due to its high glass-forming ability (GFA) and corrosion resistance in aggressive solutions [6][7][8]. The addition of Cr to amorphous steels benefits its corrosion resistance but it also affects the GFA and the mechanical response [9].…”

Section: Introductionmentioning

confidence: 99%

Glass-formation and corrosion properties of Fe–Cr–Mo–C–B glassy ribbons with low Cr content

Madinehei

Bruna

Duarte

et al. 2014

Journal of Alloys and Compounds

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The effect of low amounts of Cr on glass forming ability and corrosion behavior of Fe (65-x) Cr x Mo 14 C 15 B 6 (x=0, 2, 4, 6, 8, 10 at.%) ribbons have been studied. It was found that the reduced glass transition temperature (T rg ) do not change significantly with Cr content. The glass forming ability (GFA) of this system is evaluated by the  m ,  and  parameters and the alloys containing 4 and 6 at.% were found to be the best glass formers in this system. The temperature interval of the supercooled liquid region (∆T x ) changed with Cr and was enlarged from 35 K at x=0 to 50 K at x=4. Corrosion rates measured by immersion tests in H 2 SO 4 decreased with an increase of chromium content in the alloys. The electrochemical measurements indicate that the alloys containing more than 4 at.% of Cr are spontaneously passivated with low current densities in 0.1 N H 2 SO 4 whereas the alloys with Cr content < 4 at.% showed active behavior. In view of these results, the optimal amount of Cr addition in Fe-Mo-C-B amorphous steels is discussed.

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Comparison of the corrosion of bulk amorphous steel with conventional steel

Cited by 85 publications

References 18 publications

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Kinetics and crystallization path of a Fe-based metallic glass alloy

Glass-formation and corrosion properties of Fe–Cr–Mo–C–B glassy ribbons with low Cr content

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