Nanostructures and Oxygen Evolution Overpotentials of Surface Catalyst Layers Synthesized on Various Austenitic Stainless Steel Electrodes

The adsorption of different compounds containing the allylic group on 304 austenitic stainless steel (304SS) in H2SO4 solutions was investigated under different conditions. These include the effect of H2SO4 (1–12 M), temperature (5–45°C), inhibitor concentration [inhibitor] (10−610−1 M) and the effect of Cl− on the inhibition efficiency (%Ef). The dependence of the open circuit potential (OCP) on time as well as on the above-mentioned conditions was also investigated. The current densities (cds) for the cathodic and anodic reactions were reported under the specified conditions. Such additives were found to greatly reduce the rate of reaction and for the weak inhibitors the extent of adsorption is enhanced in the presence of Cl−. In addition, the kinetic parameters and thermodynamic functions were evaluated using appropriate equations.

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Some features of the overoxidation of polypyrrole synthesized on austenitic stainless steel electrodes in aqueous nitrate solutions

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2004.03.024 ◽

2005 ◽

Vol 191 (1) ◽

pp. 134-139 ◽

Cited By ~ 29

Author(s):

I. Fernández ◽

M. Trueba ◽

C.A. Núñez ◽

J. Rieumont

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Steel Electrodes ◽

Nitrate Solutions

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Some aspects of the defect structure in an austenitic stainless steel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100108714 ◽

1978 ◽

Vol 36 (1) ◽

pp. 314-315

Author(s):

R. Gonzalez ◽

L. Bru

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Cellular Structures ◽

Total Strain Amplitude ◽

Total Deformation ◽

Density Of Dislocations ◽

Planar Arrays ◽

Stacking Fault Tetrahedra ◽

Distribution Of Dislocations ◽

Very High

The analysis of stacking fault tetrahedra (SFT) in fatigued metals (1,2) is somewhat complicated, due partly to their relatively low density, but principally to the presence of a very high density of dislocations which hides them. In order to overcome this second difficulty, we have used in this work an austenitic stainless steel that deforms in a planar mode and, as expected, examination of the substructure revealed planar arrays of dislocation dipoles rather than the cellular structures which appear both in single and polycrystals of cyclically deformed copper and silver. This more uniform distribution of dislocations allows a better identification of the SFT.The samples were fatigue deformed at the constant total strain amplitude Δε = 0.025 for 5 cycles at three temperatures: 85, 293 and 773 K. One of the samples was tensile strained with a total deformation of 3.5%.

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A TEM microscopical investigation of the magnetic domain structure of a metastable austenitic stainless steel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100171213 ◽

1994 ◽

Vol 52 ◽

pp. 696-697

Author(s):

G. Fourlaris ◽

T. Gladman

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Austenitic Stainless Steel ◽

Cold Rolling ◽

Solution Treatment ◽

Magnetic Domain ◽

High Strength ◽

Medium Carbon Steel ◽

Magnetic Characteristics ◽

Metastable Austenitic Stainless Steel

Stainless steels have widespread applications due to their good corrosion resistance, but for certain types of large naval constructions, other requirements are imposed such as high strength and toughness , and modified magnetic characteristics.The magnetic characteristics of a 302 type metastable austenitic stainless steel has been assessed after various cold rolling treatments designed to increase strength by strain inducement of martensite. A grade 817M40 low alloy medium carbon steel was used as a reference material.The metastable austenitic stainless steel after solution treatment possesses a fully austenitic microstructure. However its tensile strength , in the solution treated condition , is low.Cold rolling results in the strain induced transformation to α’- martensite in austenitic matrix and enhances the tensile strength. However , α’-martensite is ferromagnetic , and its introduction to an otherwise fully paramagnetic matrix alters the magnetic response of the material. An example of the mixed martensitic-retained austenitic microstructure obtained after the cold rolling experiment is provided in the SEM micrograph of Figure 1.

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