scholarly journals Mott‐Schottky Plot of the Passive Film Formed on Iron in Neutral Borate and Phosphate Solutions

1987 ◽  
Vol 134 (6) ◽  
pp. 1352-1357 ◽  
Author(s):  
Kazuhisa Azumi ◽  
Toshiaki Ohtsuka ◽  
Norio Sato
Keyword(s):  
Passive Film ◽  
Schottky Plot ◽  
Phosphate Solutions

The kinetics of growth of the passive film on tungsten in acidic phosphate solutions

1998 ◽  
Vol 43 (19-20) ◽  
pp. 2851-2861 ◽  
Author(s):  
Digby D. Macdonald ◽  
Elzbieta Sikora ◽  
Janusz Sikora
Keyword(s):  
Passive Film ◽  
Kinetics Of ◽  
Phosphate Solutions

SURFACE PASSIVE FILM CHARACTERISTIC OF Q235 CARBON STEEL IN PURE MOLYBDATE SOLUTION

2019 ◽  
Vol 27 (05) ◽  
pp. 1950179 ◽  
Author(s):  
PEI ZHANG ◽  
YIJIANG CHEN ◽  
HUIJU HUANG ◽  
YONG ZHOU ◽  
FUAN YAN ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Passive Film ◽  
Electrochemical Impedance ◽  
X Ray ◽  
Dense Microstructure ◽  
Schottky Plot ◽  
Q235 Carbon Steel ◽  
Film Characteristics ◽  
Scanning Electron ◽  
Defect Microstructure

In pure Na2MoO4 solutions with different concentrations of MoO[Formula: see text] (0.01, 0.04, 0.06, 0.08 and 0.10 mmol/L), a passive film was formed on the surface of Q235 carbon steel spontaneously, and the influences of MoO[Formula: see text] concentrations on the passive film characteristics were investigated. The electrochemical and microstructural techniques of electrochemical impedance spectroscopy (EIS), Mott–Schottky plot (MSP), scanning electron microscope (SEM) and X-ray photoelectron spectroscope (XPS) were applied to characterize the passive film characteristics, including resistance, defect, microstructure and composition. The resistance and defect of passive film respectively increased and decreased with increased MoO[Formula: see text] concentration up to 0.08[Formula: see text]mmol/L, which was the critical MoO[Formula: see text] concentration of complete passivation for the Q235 surface. The passive film formed in the 0.08[Formula: see text]mmol/L Na2MoO4 solution showed a dense microstructure and was composed of Fe2(MoO[Formula: see text] mainly. Further, in this work, the relation between characteristic and anti-corrosion of passive film was also discussed.

Effect of Milling Parameters on the Stability of the Passive Film of AISI 304 Stainless Steel

2021 ◽  
Author(s):  
Rafael dos Santos Pereira ◽  
Roosevelt Droppa ◽  
Mara Cristina Lopes de Oliveira ◽  
Renato Altobelli Antunes
Keyword(s):  
Stainless Steel ◽  
Passive Film ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Milling Parameters ◽  
The Stability

scholarly journals Investigation of the Structural Heterogeneity and Corrosion Performance of the Annealed Fe-Based Metallic Glasses

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 929
Author(s):  
Dandan Liang ◽  
Jo-Chi Tseng ◽  
Xiaodi Liu ◽  
Yuanfei Cai ◽  
Gang Xu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Passive Film ◽  
Metallic Glasses ◽  
Function Analysis ◽  
Supercooled Liquid ◽  
Structural Heterogeneity ◽  
Coordination Shell ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Corrosion Performance

This study investigated the structural heterogeneity, mechanical property, electrochemical behavior, and passive film characteristics of Fe–Cr–Mo–W–C–B–Y metallic glasses (MGs), which were modified through annealing at different temperatures. Results showed that annealing MGs below the glass transition temperature enhanced corrosion resistance in HCl solution owing to a highly protective passive film formed, originating from the decreased free volume and the shrinkage of the first coordination shell, which was found by pair distribution function analysis. In contrast, the enlarged first coordination shell and nanoscale crystal-like clusters were identified for MGs annealed in the supercooled liquid region, which led to a destabilized passive film and thereby deteriorated corrosion resistance. This finding reveals the crucial role of structural heterogeneity in tuning the corrosion performance of MGs.

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