Corrosion behavior of shape memory stainless steel in acid media

Rovere, Carlos Alberto Della; Alano, José Henrique; Otubo, Jorge; Kuri, S.E.

doi:10.1016/j.jallcom.2011.02.051

Cited by 34 publications

(14 citation statements)

References 20 publications

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“…However, in chloride-containing media, these alloys have localized pitting corrosion. Sulfur-like inclusions and Mn-containing oxides act as active sites for nucleation of corrosion by pits [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes

Dias¹,

Nakamatsu

Rovere

et al. 2019

Metals

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The microstructural characterization and corrosion resistance behavior of Fe-Mn-Si-Cr-Ni alloy with shape memory effect was studied under different mechanical processing conditions and heat treatments, which were produced using conventional casting and routing methods to reduce costs and make production viable. Microstructural characterization was performed with electron microscopy and x-ray diffraction techniques, electrochemical tests with polarization, and thermogravimetry techniques. The cast condition presented a dendritic structure and the presence of the secondary phases: ferrite-δ and Chi-X phase. The heat treatment eliminated phases, reincorporated elements in the matrix, and increased the austenitic grain. After the hot rolling process, the alloy exhibited a refined microstructure with recrystallized austenitic grains. The heat-treated condition presented better oxidation resistance than the other conditions, while the hot-rolled condition showed repassivation of the pits, raising them to higher levels. All conditions presented low corrosion resistance in environments containing chloride ions.

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Section: Introductionmentioning

confidence: 99%

Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes

Dias¹,

Nakamatsu

Rovere

et al. 2019

Metals

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show abstract

“…FeMnSiCrNi alloys are known by their shape memory effect 6 . However, some studies were dedicated to evaluating the corrosion resistance of these alloys 5,7 . The presence of Cr and Si helps the formation of passive films in oxidizing environments 8 .…”

Section: Introductionmentioning

confidence: 99%

Kinetics Oxidation and Characterization of Cyclically Oxidized Layers at High Temperatures for FeMnSiCrNiCe and FeSiCrNi Alloys

et al. 2017

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Conventional stainless steels are used in cyclic oxidation, but the high amount of Cr and mainly Ni increase the price of these alloys. The objective of the present study was to assess the cyclic oxidation resistance of FeSiCrNi and FeMnSiCrNiCe alloys in comparison to AISI 304 and AISI 310 stainless steels by evaluating the oxidation kinetics and using characterization techniques to determine the oxides formed. The alloys were melted in induction furnaces and cast in sand molds. Cyclic oxidation tests were carried out in an automated oven in cycles of one hour for heating and maintenance at high temperature (850, 950 or 1050 ºC) and 10 minutes for cooling. To characterize the oxidized layers, X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS) analysis were performed. The oxidation kinetics were determined. The results showed that the studied alloys presented better results than AISI 304 at 850 ºC, but at 1050 ºC, AISI 310 presented the best results. At 950 ºC, the FeSiCrNi alloy presented layer detachment and FeMnSiCrNiCe presented a higher rate of mass variation than AISI 310, both without oxide detachment. For both alloys, formation of chromium and manganese oxides with parabolic rate of mass gain occurred.

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“…Up to date, corrosion resistance of carbon steel armors has yet to be improved. The conventional way to improve corrosion resistance is to add alloying elements such as Cr and Ni into steels and thereby changing the microstructure or coating of the steel surface [4,5]. But these methods increase the production costs while reducing corrosion loss and require many heat treatments.…”

Section: Introductionmentioning

confidence: 99%

Modification of Corrosion Resistance of the Plain Carbon Steels by Pulsed Electric Current

Gao

Liu

Zhou

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The fracture of pipelines caused by corrosion cracks and the resulting oil and gas leakage can lead to great environmental pollution and economic losses. These negative effects are due to serious corrosion of the plain carbon steels used for armor of flexible pipe in oil and gas transmission medium. However, corrosion resistance of carbon steel armors has yet to be improved. In this study, the relationship between corrosion resistance and pearlite fraction in the plain carbon steels has been investigated through the application of pulsed electric current. Based on immersion test and electrochemical measurement, pulsed electric current increases the corrosion resistance of the plain carbon steels by reducing the fraction of pearlite phase. Pitting corrosion, which tends to initiate by galvanic corrosion of ferrite and cementite, is therefore inhibited due to the decrease in pearlite fraction (mixture of ferrite and cementite) under electropulsing.

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Corrosion behavior of shape memory stainless steel in acid media

Cited by 34 publications

References 20 publications

Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes

Characterization and Corrosion Resistance Behavior of Shape Memory Stainless Steel Developed by Alternate Routes

Kinetics Oxidation and Characterization of Cyclically Oxidized Layers at High Temperatures for FeMnSiCrNiCe and FeSiCrNi Alloys

Modification of Corrosion Resistance of the Plain Carbon Steels by Pulsed Electric Current

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