scholarly journals Kinetics of Pitting Dissolution of Austenitic Stainless Steel 304 in Sodium Chloride Solution

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
M. Saadawy
Keyword(s):  
Stainless Steel ◽  
Sodium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Chloride Ion ◽  
Corrosion Current ◽  
Stainless Steel 304 ◽  
Kinetics Of Dissolution ◽  
Austenitic Stainless Steel 304 ◽  
Kinetics Of

The effect of addition of chloride ion on the corrosion of stainless steel 304 in Na2SO4 solution under constant ionic strength conditions at 30°C was studied using potential-time and potentiodynamic polarization techniques and it was found that the addition of chloride ion reduces the growth of protective passive film on the surface and increase corrosion current. The kinetics of dissolution in sodium chloride solution (0.05–0.5M) at 30°C was also studied and the kinetic rate equation was derived and was found to verify the following relationship: CCl− where .

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.

scholarly journals Peculiarities in structure formation and corrosion of cast quasicrystalline Al63Cu25Fe12 and Al63Co24Cu13 alloys in sodium chloride aqueous solution

2020 ◽  
Vol 21 (3) ◽  
pp. 530-536
Author(s):  
O. V. Sukhova ◽  
V. A. Polonskyy
Keyword(s):  
Sodium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Potential ◽  
Corrosion Current ◽  
Corrosion Properties ◽  
Free Corrosion Potential ◽  
X Ray ◽  
Marine Climate ◽  
Potentiodynamic Method

In this work the structure and corrosion behavior of quasicrystalline cast Al63Cu25Fe12 and Al63Co24Cu13 alloys in 5-% sodium chloride solution (рН 6.9–7.1) were investigated. The alloys were cooled at 5 К/s. The structure of the samples was studied by methods of quantitative metallography, X-ray analysis, and scanning electron microscopy. Corrosion properties were determined by the potentiodynamic method. The made investigations confirm the formation of stable quasicrystalline icosahedral (y) and decagonal (D) phases in the structure of Al63Cu25Fe12 and Al63Co24Cu13 alloys correspondingly. In 5-% sodium chloride solution, the investigated alloys corrode under electrochemical mechanisms with oxygen depolarization. Compared with Al63Cu25Fe12 alloy, Al63Co24Cu13 alloy has a less negative value of free corrosion potential (–0.43 V and–0.66 V, respectively), and its electrochemical passivity region extends due to the inhibition of anodic processes. A corrosion current density, calculated from (E,lgi)-curve, for Al63Co24Cu13 alloy amounts to 0.18 mА/сm2 and for Al63Cu25Fe12 alloy – to 0.20 mА/сm2. The lower corrosion resistance of Al63Cu25Fe12 alloy may be explained by the presence of iron-containing phases in its structure. Based on obtained results, the Al63Co24Cu13 alloy was recommended as a coating material for rocket-and-space equipment working in a marine climate.

scholarly journals Swelling of polyacrylamide-based hydrogel in aqueous solutions of low-molecular salts

2020 ◽  
Vol 64 (3) ◽  
pp. 293-299
Author(s):  
E. V. Vorobieva
Keyword(s):  
Sodium Chloride ◽  
Potassium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
External Solution ◽  
Swelling Kinetics ◽  
Polymer Gel ◽  
Molecular Salts ◽  
Gel Phase ◽  
Kinetics Of

The swelling kinetics of cross-linked polyacrylamide was studied depending on the composition of the external solution. It was shown that the polymer gel swelling during the transition from water to a potassium or sodium chloride solution and vice versa sharply decreases, then gradually increases. The swelling of gel in a solution of sodium chloride is higher than that of potassium chloride. In the equilibrium swollen gel, the concentration of salts in the gel phase is higher than in the external solution and increases with the transition from potassium chloride to sodium chloride.

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