Application of the modified electrochemical potentiodynamic reactivation method to detect susceptibility to intergranular corrosion of a newly developed lean duplex stainless steel LDX2101

Deng, Bo; Jiang, Yiming; Xu, Jingkai; Sun, Tao; Gao, Juan; Zhang, Lihua; Zhang, Wei; Li, Jin

doi:10.1016/j.corsci.2009.11.020

Cited by 96 publications

(48 citation statements)

References 38 publications

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“…In addition to austenite and ferrite, other phases may occur depending on the thermal history of the steel, when DSS is exposed to a temperature range of 300 to 1000 • C [65][66][67][68]. Examples of such phases are chromium nitrides, carbides, or carbonitride, as well as gamma-phase, chi-phase, R-phase, alpha-prime precipitation, [69][70][71][72], alpha precipitation, copper precipitates, and martensite in gamma phase. Generally, the formation of secondary phases influences the corrosion resistance and mechanical properties [73].…”

Section: Precipitation Of Other Phasesmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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Section: Precipitation Of Other Phasesmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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“…These authors considered the material susceptible to intergranular corrosion when the degree of sensitization (DOS=I r /I a ) was greater than 0.05 12,13 . However, other researches 14,15 were performed using different concentrations of HCl, taking into account the temperature effect. For instance, Amadou et al 14 , evaluated the sensitization of UNS S31250 duplex stainless steels ; secondly, to determine a correlation of deleterious phases precipitation by DL-EPR testing and optical microscopy analysis in specimens that were isothermally heat treated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Deleterious Phases Precipitation in the Corrosion Resistance Measured by Double Loop Electrochemical Polarization Reactivation Test in Superduplex Stainless Steel

et al. 2015

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This work investigates the influence of deleterious phases precipitation on the corrosion resistance of two wrought superduplex stainless steels UNS S32750 with similar composition, but different grain sizes. Isothermal treatments were carried out to introduce different amounts of deleterious phases, such as chi (χ), sigma (σ) and secondary austenite (γ 2 ). The specimens were tested by double loop electrochemical potentiodynamic reactivation test (DL-EPR). The kinetics of precipitation in the two steels was different due to the difference of the grain sizes. The results show a correlation between the sensitization degrees, measured by DL-EPR, with the amount of deleterious phases precipitated.

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“…5. The numerous, descriptive literature presents corrosion problems solved based on potentiostatic studies [34][35][36][37]. This approach to the problem facilitates its analysis and documentation of the process, but requires adaptation before applying the results in industrial practice.…”

Section: Resultsmentioning

confidence: 99%

Corrosion of 1.4110 stainless steel at nitrate acid at 323 K

Kruszewski

Lipiński

2018

Engineering for Rural Development

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Abstract. Corrosion is a common process of destroying construction materials. The material during these processes loses its properties, it causes deterioration of functions, loses its usefulness, applicability. One of the important aggressive environments in the agricultural industry is nitrogen, from which nitric acid may be formed. Due to high hardness and also a good resistance to abrasion and corrosion the 1.4110 steel is commonly used in industry as knife blades, machining tools, measuring tools, pump construction, valves. Stainless steel is steel with good resistance to homogeneous or local environmental attack. The aim of the research was to determine the corrosive wear of 1.4110 steel (X55Cr), corrosion resistance with martensitic microstructure using the Huey test. The tested steel contains 0.52 % C, 13.4 % Cr and 0.65 % Mo. The samples were weighed before start of the corrosion processes and after them. Samples were kept in nitric acid 65 % at temperature 323K. The holding times of the samples in nitric acid were 48, 96, 144, 192, 240, 288, 336, 384 hours. The percentage of mass losses was determined by the weight method. Each sample was examined metallographically using an optical microscope and the surface roughness test using a profilometer. The test results were analyzed in order to determine the corrosion rate of steel in mm/year and g/m2 as well as percentage mass loss and determine the corrosion resistance in this environment. After corrosion of the steel, the roughness has increased. Mass loss and corrosion velocity were presented by a linear function, but greater accuracy is obtained by using the 3rd degree polynomial. Then it was confirmed that as the holding time in boiling nitric acid increases, corrosive wear increases. Generally, the tested steel 1.4110 has a good corrosion resistance in the nitricacid environment.Keywords: steel, stainless steel, corrosion, corrosion rate, roughness. IntroductionIn technics corrosion mainly concerns metal materials and within them also iron alloys. Stainless steel is steel with good resistance to homogeneous or local environmental attack. Corrosion-resistant steels created have resistance only in specific conditions [1][2][3][4][5][6][7]. Their corrosion resistance depends i.a. on the chemical ingredients, microstructure, surface condition. Corrosion-resistant steels have at least 10.5 % chromium and a maximum of 1.2 % carbon, elements that conduce to forming of the surface layer (passive), with dense structure and consistent with the base, causing a jump of the chemical potential, it has a tendency to self-rebuilding and provides corrosion resistance. Along with the increasing content of the chromium, nickel, molybdenum the corrosion resistance is gaining. Corrosion is a phenomenon of material damage as a result of the chemical and electrochemical environment influence [8][9][10][11][12].In alloys and metals changes occur as a result of interaction with the surrounding environment. The corrosion process begins at the point of contact with the environme...

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Application of the modified electrochemical potentiodynamic reactivation method to detect susceptibility to intergranular corrosion of a newly developed lean duplex stainless steel LDX2101

Cited by 96 publications

References 38 publications

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Influence of Deleterious Phases Precipitation in the Corrosion Resistance Measured by Double Loop Electrochemical Polarization Reactivation Test in Superduplex Stainless Steel

Corrosion of 1.4110 stainless steel at nitrate acid at 323 K

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