Effect of austenite stability on the pitting corrosion resistance of cold worked stainless steels

Peguet, Lionel; Malki, B.; Baroux, B.

doi:10.1016/j.corsci.2008.12.026

Cited by 71 publications

(22 citation statements)

References 65 publications

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“…While in the case of CN1.03Mo2.5 40% of plastic deformation leaves the break‐down potential nearly unaffected compared to solution annealed state (both black curves superpose each other), the same experiment with CN1.02Mo2.5Ni1.5 leads to a lower U D for the prestrained sample (1159 vs. 1130 mV). These findings are consistent with literature data, where many studies, as mentioned in Section 1, found a detrimental effect, while others reported of unaffected or even increasing pitting potentials for prestraining of different types of austenitic stainless steels. Decrease of corrosion resistance by cold working has been attributed to strain‐induced martensitic phase transformation, accumulation of defects by high dislocation density, or changes in passive film stability.…”

Section: Resultssupporting

confidence: 93%

“…[3,31] Cold working is widely used to increase hardness and strength, as well as fatigue life of high interstitial austenites, [2] but is held responsible for lowering of corrosion resistance of austenitic stainless steels in many studies. [32][33][34][35][36] Within this study, different grades of high interstitial austenitic stainless steels were investigated by means of corrosion and CE testing, taking into account the influences of altering alloying elements as well as prestraining.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Cold Work on Pitting Corrosion and Cavitation Erosion of High Interstitial FeCrMnCN Austenites

Niederhofer

Siebert

Huth

et al. 2015

steel research int.

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High interstitial steels (HIS) are based on the joint addition of carbon and nitrogen, which resulted in an austenitic FeCrMn steel grade. In contrast to high nitrogen steels (HNS), they can be produced by conventional metallurgy and offer a unique combination of mechanical properties and corrosion resistance. This makes them promising candidates for the use in environments featuring corrosive or wear attack or even both. Corrosion resistance can be improved by the addition of molybdenum, particularly in the case of media containing chloride ions. In this study, different FeCrMnCN alloys were investigated by means of pitting corrosion testing in sodium chloride solution, as well as cavitation erosion resistance. These properties were examined depending on prestraining, since the latter is used to strengthen this kind of alloys.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Influence of Cold Work on Pitting Corrosion and Cavitation Erosion of High Interstitial FeCrMnCN Austenites

Niederhofer

Siebert

Huth

et al. 2015

steel research int.

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“…The experimental evidence shows that the applied tensile stress can result in a low pitting potential [46] and increase the surface reactivity [41] of stainless steels in chloride-containing aqueous solutions. The detrimental impact of plastic deformation on pitting resistance of stainless steels has been also observed by different researchers [47][48][49].…”

Section: Effect Of Microstructural Heterogeneitymentioning

confidence: 83%

Pitting susceptibility of induction-quenched pipeline with microstructural heterogeneity

Luo

et al. 2012

J Mater Sci

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Pitting corrosion was found to be the immature failure mechanism for a slurry pipe that has an internal surface hardened with induction-quenching technique. The metallographic examination shows that the microstructure of surface layer is a banded mixture of martensite, ferrite, and pearlite. The pits initiate preferably in the ferrite bands. Electrochemical measurements are conducted to evaluate the pitting susceptibility of each constituent. When the small amount of chloride is present, the breakdown potential of ferrite is lower than those of martensite and pearlite. The high likelihood of metastable pit initiation in ferrite is also demonstrated by the electrochemical noise records. The development of pits in ferrite in the mixed microstructure is further promoted by the galvanic effect when ferrite is coupled with pearlite or martensite. The passive film of steel is an n-type semiconductor. The Mott-Schottky measurements indicate that the passive film formed on the ferrite specimen contains more oxygen vacancies, suggesting that the lower breakdown resistance is likely due to a highly defective film structure. The high-to-low pitting susceptibility is ferrite [ martensite [ pearlite. The experimental observations of this study imply that a practical approach to improve the performance of tailing pipes is to eliminate the microstructural heterogeneity in the surface layer by modifying the induction-heating process.

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“…The results suggest that the electrical equiva- lent circuit should include two electrical capacitances [10][11][12], which are connected with the structure of the interface of electrode and solution. The bi-layer character of the passive layer was postulated by many researchers [12][13][14]. One of the two electrical capacitances is the capacitance of the electric double layer, and the other is the capacitance of the passive film.…”

Section: Resultsmentioning

confidence: 98%

“…According to the impedance/potential curve of the passive film, it also easily divides the pitting corrosion into two stages: metastable and stable stages. The shapes of the relationship between electric parameters and potential are expected and simple to elucidate on the basis of a film-breaking model [13][14][15]. The fluctuations of the electrical parameters constituting the electrical equivalent circuit may be explained by the stochastic balance between the generation and repassivation of metastable pits.…”

Section: Resultsmentioning

confidence: 99%

Study on pitting process of 316L stainless steel by means of staircase potential electrochemical impedance spectroscopy

Jia

et al. 2011

Int J Miner Metall Mater

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Pitting corrosion of 316L stainless steel in NaCl solution was investigated by means of staircase potential electrochemical impedance spectroscopy (SPEIS). The investigation focused on the transition of stainless steel from the passive state to pitting corrosion. Based on the evolution of electrical parameters of the equivalent electrical circuit, it is suggested that the most probable mechanism of pit creation is the film breaking model. The result demonstrates that staircase potential electrochemical impedance spectroscopy is an effective method for the investigation of pitting corrosion.

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Effect of austenite stability on the pitting corrosion resistance of cold worked stainless steels

Cited by 71 publications

References 65 publications

Influence of Cold Work on Pitting Corrosion and Cavitation Erosion of High Interstitial FeCrMnCN Austenites

Influence of Cold Work on Pitting Corrosion and Cavitation Erosion of High Interstitial FeCrMnCN Austenites

Pitting susceptibility of induction-quenched pipeline with microstructural heterogeneity

Study on pitting process of 316L stainless steel by means of staircase potential electrochemical impedance spectroscopy

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