Analysis of Passive Films on Stainless Steel by Cyclic Voltammetry and Auger Spectroscopy

1985 ◽  
Vol 132 (4) ◽  
pp. 793-798 ◽  
Author(s):  
N. Ramasubramanian ◽  
N. Preocanin ◽  
R. D. Davidson
Keyword(s):  
Stainless Steel ◽  
Cyclic Voltammetry ◽  
Auger Spectroscopy ◽  
Passive Films

scholarly journals Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

2011 ◽  
Vol 77 (15) ◽  
pp. 5394-5401 ◽  
Author(s):  
Emilie Lyautey ◽  
Amandine Cournet ◽  
Soizic Morin ◽  
Stéphanie Boulêtreau ◽  
Luc Etcheverry ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Cyclic Voltammetry ◽  
Oxygen Reduction ◽  
Saturated Calomel Electrode ◽  
Bacterial Strains ◽  
Phenotypic Properties ◽  
Content Type ◽  
Population Scale ◽  
River Biofilm ◽  
Biofilm Development

ABSTRACTElectroactivity is a property of microorganisms assembled in biofilms that has been highlighted in a variety of environments. This characteristic was assessed for phototrophic river biofilms at the community scale and at the bacterial population scale. At the community scale, electroactivity was evaluated on stainless steel and copper alloy coupons used both as biofilm colonization supports and as working electrodes. At the population scale, the ability of environmental bacterial strains to catalyze oxygen reduction was assessed by cyclic voltammetry. Our data demonstrate that phototrophic river biofilm development on the electrodes, measured by dry mass and chlorophyllacontent, resulted in significant increases of the recorded potentials, with potentials of up to +120 mV/saturated calomel electrode (SCE) on stainless steel electrodes and +60 mV/SCE on copper electrodes. Thirty-two bacterial strains isolated from natural phototrophic river biofilms were tested by cyclic voltammetry. Twenty-five were able to catalyze oxygen reduction, with shifts of potential ranging from 0.06 to 0.23 V, cathodic peak potentials ranging from −0.36 to −0.76 V/SCE, and peak amplitudes ranging from −9.5 to −19.4 μA. These isolates were diversified phylogenetically (Actinobacteria,Firmicutes,Bacteroidetes, andAlpha-,Beta-, andGammaproteobacteria) and exhibited various phenotypic properties (Gram stain, oxidase, and catalase characteristics). These data suggest that phototrophic river biofilm communities and/or most of their constitutive bacterial populations present the ability to promote electronic exchange with a metallic electrode, supporting the following possibilities: (i) development of electrochemistry-based sensors allowingin situphototrophic river biofilm detection and (ii) production of microbial fuel cell inocula under oligotrophic conditions.

scholarly journals Effect of Mechanical Surface Treatments on the Surface State and Passive Behavior of 304L Stainless Steel

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 135
Author(s):  
Kathleen Jaffré ◽  
Benoît Ter-Ovanessian ◽  
Hiroshi Abe ◽  
Nicolas Mary ◽  
Bernard Normand ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Surface State ◽  
Electrochemical Impedance ◽  
Passive Films ◽  
Surface Finishing ◽  
Ultrafine Grain ◽  
304L Stainless Steel ◽  
Passive Behavior

The effect of dry grinding on 304L stainless steel’s passive behavior is compared to two other surface finishing (mechanical polishing down to 2400 with SiC emery paper and 1 µm with diamond paste, respectively). The characterization of the surface state was performed using scanning electron microscopy, transmission electron microscopy, 3D optical profilometer, and X-ray diffraction. Results indicate that each surface treatment leads to different surface states. The ground specimens present an ultrafine grain layer and a strong plastic deformation underneath the surface, while an ultrafine grain layer characterizes the subsurface of the polished specimens. Grinding induces high residual compressive stresses and high roughness compared to polishing. The characterization of the passive films was performed by electrochemical impedance spectroscopy and Mott–Schottky analysis. The study shows that the semiconductor properties and the thickness of the passive films are dependent on the surface state of the 304L stainless steel.

ChemInform Abstract: Adsorbed Thiophenol (I) and Related Compounds (II)-(VI) Studied at Pt(111) Electrodes by EELS, Auger Spectroscopy, and Cyclic Voltammetry.

ChemInform ◽  
1988 ◽  
Vol 19 (46) ◽  
Author(s):  
D. A. STERN ◽  
E. WELLNER ◽  
G. N. SALAITA ◽  
L. LAGUREN-DAVIDSON ◽  
F. LU ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Auger Spectroscopy ◽  
Related Compounds

Oxide Films on Stainless Steels★

CORROSION ◽  
1956 ◽  
Vol 12 (3) ◽  
pp. 41-53 ◽  
Author(s):  
THOR N. RHODIN
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Oxide Films ◽  
Film Structure ◽  
Passive Films ◽  
Film Properties ◽  
Film Composition ◽  
Corrosion Resistant ◽  
Compositional Properties

Abstract Oxide films on stainless steels have been classified into three types according to film thickness, film structure, film composition, and influence of the film on resistance to corrosion. Compositional properties of oxide films isolated from surfaces of stainless steels were studied using specially developed microanalytical techniques. Properties of passive films on stainless steel were evaluated and the effects of alloy composition and surface treatment on other types of films on Types 304, 316, and 347 stainless steels were studied. The influence of corrosion in various media was correlated with film compositional properties. Composition of films after immersion in acids was found to be related to film composition prior to immersion. The effect of immersion depended on the nature and intensity of corrosion and was reflected most sensitively by the iron and silicon contents of the films. The conclusion was made that film properties indicate strongly the capacity of austenitic stainless alloys to develop corrosion-resistant surfaces in certain environments.

RETRACTED: The Study of Composition and Morphology of Pd-Ag Alloy Powders by Electrodeposition

2017 ◽  
Vol 732 ◽  
pp. 81-85
Author(s):  
Chin Ming Chu ◽  
Shi Wen Yang ◽  
Shen Li Tsai ◽  
Wen Bing Yang
Keyword(s):  
Stainless Steel ◽  
Cyclic Voltammetry ◽  
Reduction Potential

Pd-Ag alloy powders were prepared on the stainless steel by DC electrodeposition. Cyclic voltammetry found the reduction potential of Pd, Ag and Pd-Ag. The composition and morphology of Pd-Ag were investigated by means of SEM, EDS.

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