Corrosion Behavior of the Electrochemical Couple: Hastelloy/Carbon Material in Zirconium Fluoride - Sodium Fluoride Melts

2019 ◽  
Vol 3 (35) ◽  
pp. 543-554
Author(s):  
Anatolii A. Omel'chuk ◽  
Sergei V. Volkov ◽  
Boris M. Voronin ◽  
Nikolai I. Buryak ◽  
Alexander A. Andriiko ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Sodium Fluoride ◽  
Carbon Material ◽  
Zirconium Fluoride ◽  
Fluoride Melts

Ionic Clusters in Aluminium–Sodium Fluoride Melts

1998 ◽  
Vol 12 (23) ◽  
pp. 995-1002 ◽  
Author(s):  
Z. Akdeniz ◽  
Z. Çiçek ◽  
G. Pastore ◽  
M. P. Tosi
Keyword(s):  
Raman Scattering ◽  
Sodium Fluoride ◽  
Theoretical Explanation ◽  
Excess Charge ◽  
Sodium Ions ◽  
Ionic Clusters ◽  
Ionic Model ◽  
Fluoride Melts ◽  
The Stability

From Raman scattering experiments three types of charged AlF n cluster (with n = 4, 5 and 6) have been proposed to coexist in liquid alkali fluoroaluminates such as cryolite ( Na 3 AlF 6). We characterize these isolated clusters by a phenomenological ionic model and employ it to examine how local screening of the excess charge on a cluster may be effected by sodium ions at various compositions in the liquid. We provide the first theoretical explanation for the stability of the AlF 5 cluster at the compositions Na 3 AlF 6 and Na 2 AlF 5.

scholarly journals The effects of NaF concentration on electrochemical and corrosion behavior of AZ31B magnesium alloy in a composite electrolyte

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5880-5887 ◽  
Author(s):  
Jing Xu ◽  
Qiaoling Yang ◽  
Muhammad Sufyan Javed ◽  
Youlai Gong ◽  
Muhammad Kashif Aslam ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Sodium Fluoride ◽  
Composite Electrolyte ◽  
Az31b Magnesium Alloy ◽  
Composite Solution

Electrochemical and corrosion behavior of AZ31B magnesium alloy have been investigated in composite solution of MgSO4–Mg(NO3)2 (0.14 mol L−1 MgSO4, 1.86 mol L−1 Mg(NO3)2) under different sodium fluoride (NaF) concentrations.

Sem Studies of Co-Cr-Mo Surgical Implant Alloy Corrosion Behavior

1982 ◽  
Vol 40 ◽  
pp. 520-521
Author(s):  
Ann Chidester Van Orden ◽  
John L. Chidester ◽  
Anna C. Fraker ◽  
Pei Sung
Keyword(s):  
Electron Microscopy ◽  
Corrosion Behavior ◽  
Anodic Polarization ◽  
Saline Solution ◽  
Saturated Calomel Electrode ◽  
Physiological Saline ◽  
X Ray ◽  
Physiological Saline Solution ◽  
Scanning Electron

The influence of small variations in the composition on the corrosion behavior of Co-Cr-Mo alloys has been studied using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), and electrochemical measurements. SEM and EDX data were correlated with data from in vitro corrosion measurements involving repassivation and also potentiostatic anodic polarization measurements. Specimens studied included the four alloys shown in Table 1. Corrosion tests were conducted in Hanks' physiological saline solution which has a pH of 7.4 and was held at a temperature of 37°C. Specimens were mechanically polished to a surface finish with 0.05 µm A1203, then exposed to the solution and anodically polarized at a rate of 0.006 v/min. All voltages were measured vs. the saturated calomel electrode (s.c.e.).. Specimens had breakdown potentials near 0.47V vs. s.c.e.

Kinetics and mechanism of the reduction of selenium (IV) by iron (II) in presence of sodium fluoride

1973 ◽  
Vol 70 ◽  
pp. 918-922 ◽  
Author(s):  
R. K. Srivastava ◽  
V. K. Srivastava ◽  
M. N. Srivastava ◽  
B. B. L. Saxena
Keyword(s):  
Sodium Fluoride ◽  
Kinetics And Mechanism

CORROSION BEHAVIOR OF AMORPHOUS IRON-BASE ALLOYS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-862-C8-866
Author(s):  
M. Naka ◽  
K. Hashimoto ◽  
K. Asami ◽  
T. Masumoto
Keyword(s):  
Corrosion Behavior ◽  
Amorphous Iron ◽  
Iron Base

18F-sodium fluoride bone deposition quantitation with PET in Mice: Variation with age, sex, and circadian rhythm

2020 ◽  
Vol 59 (06) ◽  
pp. 428-437
Author(s):  
Viktoria Dorau-Rutke ◽  
Kai Huang ◽  
Mathias Lukas ◽  
Marc O. Schulze ◽  
Christian Rosner ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Sodium Fluoride ◽  
Bone Growth ◽  
Bone Volume ◽  
Sleep Phase ◽  
Median Percentage ◽  
Bone Uptake ◽  
Pooled Data ◽  
Uptake Studies ◽  
Bone Deposition

Abstract Aim The aim of this study was to establish a data base for normal 18F-sodium fluoride (18F-NaF) bone uptake as a function of age, sex and circadian rhythm in mice. Methods In 12 female (F) and 12 male (M) C57BL/6N mice PET images were acquired 90 min after intravenous injection of 20 MBq 18F-NaF for 30 minutes. Each mouse was imaged in follow-up studies at 1, 3, 6, 13 and 21 months of age. In order to assess for physiologic changes related to circadian rhythm, animals were imaged during light (sleep phase) as well as during night conditions (awake phase). Bone uptake is described as the median percentage of the injected activity (%IA) and in relation to bone volume (%IA/ml). Results A significant smaller bone volume was found in F (1.79 ml) compared to M (1.99 ml; p < 0.001). In sex-pooled data, highest bone uptake occurred at an age of 1 month (61.1 %IA, 44.5 %IA/ml) with a significant reduction (p < 0.001) at age 3 months (43.6 %IA, 23.6 %IA/ml), followed by an increase between 13 (47.3 %IA, 24.5 %IA/ml) and 21 months (52.2 %IA, 28.1 %IA/ml). F had a significantly higher total uptake (F 48.2 %IA, M 43.8 %IA; p = 0.026) as well as a higher uptake per ml bone tissue (F 27.0 %IA/ml; M 22.4 %IA/ml; p < 0.001). A significant impact of circadian rhythm was only found for F at ages of 3 and 6 months with a higher uptake during the sleep phase. Conclusion Circadian rhythm had a significant impact on uptake only in F of 3 and 6 months. Regarding sex, F showed generally higher uptake rates than M. The highest uptake values were observed during bone growth at age 1 month in both sexes, a second uptake peak occurred in elderly F. Designing future bone uptake studies with M, attention must be paid to age only, while in F circadian rhythm and age must be taken into account.

Sign in / Sign up

Export Citation Format

Share Document