Corrosion Resistance of High-Alloyed Material UNS N08028 in Sodium Chloride Solution

2014 ◽  
Vol 893 ◽  
pp. 440-443
Author(s):  
Li Na Zhang ◽  
Jerzy A. Szpunar ◽  
Jian Xin Dong ◽  
Mai Cang Zhang
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Corrosion Rate ◽  
Current Density ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Potential ◽  
Ph Value ◽  
Chloride Concentration ◽  
Decreasing Ph

The influence of ions chloride concentration and pH value on the corrosion resistance of high-alloyed material UNS N08028 in the sodium chloride solution is investigated. Results show that the corrosion potential is active cathodically with the increase of chloride concentration. The current density and corrosion rate both increase with increasing chloride concentration and decreasing pH value.

Influence of the Crystallographic Orientation of Grains and Plastic Deformation on the Electrochemical Behavior of Pure Aluminum in Sodium Chloride Solution

2015 ◽  
Vol 227 ◽  
pp. 19-22 ◽  
Author(s):  
Zbigniew Szklarz ◽  
Halina Krawiec ◽  
Mirosław Wróbel
Keyword(s):  
Plastic Deformation ◽  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Current Density ◽  
Crystallographic Orientation ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Behaviour ◽  
Pure Aluminum ◽  
Pure Aluminium

In this paper, the influence of the crystallographic orientation of grains on the corrosion behaviour of pure aluminium is investigated combining the Electrochemical Microcell and the X-Ray Diffraction (XRD) Techniques. Crystallographic orientation has strong influence on the current density in the cathodic branch and the breakdown potential. The influence of plastic deformation (compression) on the corrosion resistance is also investigated. Compression has nearly no influence on the current density in the cathodic domain, but improves the corrosion resistance of aluminium in sodium chloride solution.

scholarly journals Experimental Study of the Microstructural Evolution of Glauberite and Its Weakening Mechanism under the Effect of Thermal-Hydrological-Chemical Coupling

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 99 ◽  
Author(s):  
Shuzhao Chen ◽  
Donghua Zhang ◽  
Tao Shang ◽  
Tao Meng
Keyword(s):  
Sodium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Crack Nucleation ◽  
Chloride Concentration ◽  
Solution Concentration ◽  
Expansion Velocity ◽  
Research Subjects ◽  
Characteristic Index ◽  
Chemical Coupling

The microstructures of rock gradually evolve with changes in the external environment. This study focused on the microstructure evolution of glauberite and its weakening mechanism under different leaching conditions. The porosity were used as a characteristic index to study the effect of brine temperature and concentration on crack initiation and propagation in glauberite. The research subjects were specimens of ϕ3 × 10 mm cylindrical glauberite core, obtained from a bedded salt deposit buried more than 1000 m underground in the Yunying salt formation, China. The results showed that when the specimens were immersed in solution at low temperature, due to hydration impurities, cracks appeared spontaneously at the centre of the disc and the solution then penetrated the specimens via these cracks and dissolved the minerals around the crack lines. However, with an increase of temperature, the dissolution rate increased greatly, and crack nucleation and dissolved regions appeared simultaneously. When the specimens were immersed in a sodium chloride solution at the same concentration, the porosity s presented gradual upward trends with a rise in temperature, whereas, when the specimens were immersed in the sodium chloride solution at the same temperature, the porosity tended to decrease with the increase of sodium chloride concentration. In the process of leaching, the hydration of illite, montmorillonite, and the residual skeleton of glauberite led to the expansion of the specimen volume, thereby producing the cracks. The diameter expansion rate and the expansion velocity of the specimen increased with temperature increase, whereas, due to the common-ion effect, the porosity of the specimen decreases with the increase of sodium chloride solution concentration.

scholarly journals Corrosion Rate of Aluminum Alloy in Moving Sodium Chloride Solution

1998 ◽  
Vol 47 (4) ◽  
pp. 254-259 ◽  
Author(s):  
Yasuyuki Takatani ◽  
Tsuyoshi Masugata ◽  
Kazuo Fujiwara ◽  
Koichi Shinkai ◽  
Koichi Hayashi
Keyword(s):  
Aluminum Alloy ◽  
Sodium Chloride ◽  
Corrosion Rate ◽  
Chloride Solution ◽  
Sodium Chloride Solution

Microstructural And Corrosion Resistance Study Of Sintered Al-Tin In Sodium Chloride Solution

2019 ◽  
Vol 18 ◽  
pp. 2881-2886 ◽  
Author(s):  
Samuel Olukayode Akinwamide ◽  
Neo Tshabalala ◽  
Oluwasegun Eso Falodun ◽  
Samuel Ranti Oke ◽  
Ojo Jeremiah Akinribide ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution

THE INHIBITION EFFECT OF ZINC AND SILICATE IONS ON PITTING CORROSION INDUCED BY CERIUM(III) IONS OF CARBON STEEL IN SODIUM CHLORIDE SOLUTION

2020 ◽  
pp. 2050038
Author(s):  
QIONGWEI LI
Keyword(s):  
Sodium Chloride ◽  
Carbon Steel ◽  
Pitting Corrosion ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Potential ◽  
In Situ Observation ◽  
Inhibition Effect ◽  
Synergistic Inhibition

Pitting corrosion of carbon steel in sodium chloride solution induced by Ce[Formula: see text] and the synergistic inhibition effects of Ce[Formula: see text] and Zn[Formula: see text]/SiO[Formula: see text] were investigated using in-situ observation and electrochemical methods. The results showed that the presence of Ce[Formula: see text] could result in severe pitting corrosion and a positive shift in the corrosion potential. It was found that individual Ce[Formula: see text], Zn[Formula: see text], or SiO[Formula: see text] had low inhibition efficiencies, whereas the combination of Ce[Formula: see text] and Zn[Formula: see text] or SiO[Formula: see text] proved to be highly effective in inhibiting the development of pits in two different ways and in enhancing the corrosion resistance. The pitting corrosion and inhibition mechanisms were discussed based on the results.

Study on Electroless Ni-P Deposit on W-Cu Alloy and its Anti-Corrosion Mechanism

2008 ◽  
Vol 373-374 ◽  
pp. 240-243 ◽  
Author(s):  
Long Hao ◽  
Ye Ming Zhang ◽  
Chao Yang ◽  
Hua Zhu ◽  
Xu Hui Mao ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Potentiodynamic Polarization ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Alloy Coating ◽  
Corrosion Mechanism ◽  
Alloy Substrate ◽  
Cu Alloy ◽  
Electroless Ni

With suitable pretreatment, a compact and even nickel-phosphorus alloy coating was obtained on W-Cu alloy by electroless deposition from solutions containing nickel sulphate as a source of nickel and sodium hypophosphite as the reducing agent and a source of phosphorus. The Ni-P coating was normally prepared from acidic baths at high temperature of the order of 90oC with the pH of 4.8 and it was smooth and uniform and exhibited high crystal refinement and high microhardness and superior corrosion resistance. The microhardness, adhesion and corrosion resistance mechanism of Ni-P deposit were studied. The microhardness of the Ni-P alloy deposit increases greatly by tempering at various temperatures. The Ni-P deposit has a strong adhesive force with W-Cu alloy substrate checked by thermal shock test and scribe test. The anti-corrosion ability of Ni-P coating and its anti-corrosion mechanism were measured using immersion experiment and potentiodynamic polarization techniques. The results showed that the corrosion resistance of Ni-P coating was higher than that of W-Cu alloy substrate in the 10vol.% sulfuric acid, monitoring sweat solution and 3.5wt.% sodium chloride solution. The anti-corrosion mechanism of electroless Ni-P coating immersed in 3.5wt.% sodium chloride solution was studied using potentiodynamic polarization techniques. The surface micromorphological morphology and structure of the Ni-P coating were investigated using Scanning Electronic Microscope (SEM) and X-ray Diffraction (XRD). The results indicated that the Ni-P alloy coating consisted of microcrystals and it was amorphous in structure, and the electrochemical measurement showed passive film formed on Ni-P coating during immersion test in the 3.5wt.% sodium chloride solution.

Improvement in the corrosion resistance of stainless steel 304L in sodium chloride solution by a nanoclay incorporated silane coating

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 706-716 ◽  
Author(s):  
F. Ansari ◽  
R. Naderi ◽  
C. Dehghanian
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Corrosion Protection ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Sol Gel ◽  
Nacl Solution ◽  
Stainless Steel 304L ◽  
Silane Coating

An eco-friendly silane sol–gel coating incorporating nanoclay was formulated to provide an effective corrosion protection for stainless steel 304L in a NaCl solution.

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