Influence of Mechanical Stress on the Potential Distribution on a 301 LN Stainless Steel Surface

Fuertes, Nuria; Назаров, А. Д.; Vucko, Flavien; Pettersson, Rachel; Thierry, Dominique

doi:10.1149/2.0511509jes

Cited by 25 publications

(44 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The sample was unloaded and the potential distribution was measured in 24 h after unloading ( Figure 6, curve 2). The potential in the area of notch was decreased by the plastic strain compared with areas outside the notch, and it is in agreement with the potential variations for 301 LN stainless steel 20 and ewf for duplex stainless steel. 34 Visual observation and AFM topography show the plastic strain, and slip bands, in the area of the residual stress (Figures 7a, 7b).…”

Section: Resultssupporting

confidence: 84%

“…34 Visual observation and AFM topography show the plastic strain, and slip bands, in the area of the residual stress (Figures 7a, 7b). The thickness of the oxide film on 301 LN influences the potential; 20 the thinner the oxide layer, the more negative the potential. In addition, the composition and oxidation state can also influence the potential drop across the oxide film.…”

Section: Resultsmentioning

confidence: 99%

“…The 301 LN was investigated in the tempered and rolled condition meaning that substantial work hardening and straininduced martensitic phase were present. 20 The mechanical properties were determined by tensile testing on a flat specimen with a testing speed of 0.0067 s −1 (see Table II). Unless otherwise specified, the steel surface for SKP and LEIS measurements was grinded using silicon carbide paper down to SiC #1000, degreased in ethanol, rinsed in deionized water and stored in dry air.…”

Section: Methodsmentioning

confidence: 99%

“…For measurements in situ under load, a constant load cell with fixed tensile sample was inserted in the SKP chamber. 20 The experiments were performed in laboratory air at ambient temperature 22…”

mentioning

confidence: 99%

See 3 more Smart Citations

Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Назаров

Vivier

Thierry

et al. 2017

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

The influence of mechanical stress on the electrochemical properties of ferritic steel SAE 1008 and austenitic stainless steel 301LN was studied using Scanning Kelvin Probe and Localized Electrochemical Impedance Spectroscopy (LEIS) techniques. The probeworking electrode Volta potential difference was mapped in situ under load. It was found that the influence of elastic deformation on the potential was small. Plastic deformation decreased the potential of steel by 150-300 mV, whereas the relaxation of the load from the plastic domain increased the Volta potential. However, some locations, which can contain residual stress, remained at low potential. The pre-strained surfaces were characterized by X-ray Photo Electronic Spectroscopy and by Atomic Force Microscopy. Distribution of the capacitance across strained and strain-free surfaces was studied by LEIS in boric/borate electrolyte. The plastic stress increases the capacitance and decreases the ability of the steels to passivate the surface indicating that emerging of pile-ups of dislocations create defective oxide films. Stress corrosion cracking (SCC) is a well-known complex corrosion process caused by the combination of stress and corrosion, which can lead to wear, cracking or fatigue failures. In many cases, the residual stress from plastic deformation or wear accelerates the corrosion rate.1 In the classic film rupture model, tensile stress breaks the passive film creating anodic locations at the bottom of the crack, 2,3 which propagates through an activation/passivation process. This model was developed to the "slip dissolution-film rupture model" pointing out the importance of formation of dislocations and metal dissolution through dislocation slip lines.3,4 The slip dissolution-film rupture model of crack advance was discussed in details previously. 5 This model can predict the crack growth rate for the stainless steels, nickel alloys, and low-alloy steels in high temperature water. 6 The effect of the yielding on the rate of dissolution of many metals was found to be much pronounced in comparison with the influence of elastic deformation. 7 The dissolution rate showed a marked rise at the beginning of the plastic region that is asymptotic with increasing strain. Similar effects of plastic deformation on the anodic current during dissolution were also found for stainless steels.8 To explain this mechanical-electrochemical effect, both the increase of dissolution rate at slip edges and dislocations, and the increase of surface roughness from plastic deformation were pointed out.8 On the other hand, the selective slip dissolution can be ascribed to the local excess of Gibbs potential, 7,8 thus contradicting earlier works. Hoar 9 has shown that both enthalpy and entropy of activation were not significantly altered by cold work, which meant that the free energy of activation for anodic reaction should remain almost constant. A calorimetric study 10 showed that residual energy from cold work was less than 7 calories per gram without any significant impact on ...

show abstract

Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Назаров

Vivier

Thierry

et al. 2017

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Измерители контактной разности потенциа-лов (КРП) находят широкое применение как при решении научно-исследовательских задач [1][2][3], так и в промышленности при оценке состояния поверхности материалов различной физической природы [4][5][6], качества очистки их поверхностей [7,8], защитных и эксплуатационных свойств тонких пленок и покрытий [9,10] и др. [11], в том числе для изделий микро-и нанотехнологии [12].…”

Section: Introductionunclassified

Design of the Contact Potentials Difference Probes

Пантелеев¹,

Микитевич²,

Жарин³

2016

Prib. metody izmer.

View full text Add to dashboard Cite

Investigation of the passivation process of plastically deformed 316L stainless steel using the high frequency capacitance obtained by EIS

Boudinar¹,

Belmokre²,

Touzet

et al. 2018

Materials & Corrosion

View full text Add to dashboard Cite

This paper was devoted to the study of changes of electrochemical processes (dissolution, passivation) induced by the plastic strain of a 316L austenitic stainless steel in a chloride acid solution (H2SO4 2 M + NaCl 0.5 M). For this purpose, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods have been used for various plastic strain values. In order to only assess the effect of internal stresses created by various dislocation configurations on the dissolution and passivation processes without considering the surface roughness impact, electrochemical experiments have been carried out after polishing the specimen surface. The obtained results show that the electrochemical parameters (corrosion current, activation current peak, high frequency capacitance) change with the increase of plastic strain with the same behavior as the work hardening phases of the material in relation to dislocation pattern.

show abstract

Influence of Mechanical Stress on the Potential Distribution on a 301 LN Stainless Steel Surface

Cited by 25 publications

References 37 publications

Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Design of the Contact Potentials Difference Probes

Investigation of the passivation process of plastically deformed 316L stainless steel using the high frequency capacitance obtained by EIS

Contact Info

Product

Resources

About