The Anodic Polarization Behavior of Nickel in Acidic Chloride Solution

1974 ◽  
Vol 121 (9) ◽  
pp. 1141 ◽  
Author(s):  
M. Zamin ◽  
M. B. Ives
Keyword(s):  
Chloride Solution ◽  
Anodic Polarization ◽  
Polarization Behavior ◽  
Acidic Chloride Solution ◽  
Acidic Chloride

Effect of Delta Ferrite on Corrosion Resistance of Type 316L Stainless Steel in Acidic Chloride Solution by Micro-Droplet Cell

2007 ◽  
Vol 124-126 ◽  
pp. 1533-1536 ◽  
Author(s):  
Sung Yu Kim ◽  
Hyuk Sang Kwon ◽  
Hee San Kim
Keyword(s):  
Corrosion Resistance ◽  
Chloride Solution ◽  
Ferrite Phase ◽  
Potential Zone ◽  
Delta Ferrite ◽  
Polarization Behavior ◽  
Δ Ferrite ◽  
Acidic Chloride Solution ◽  
Type 316L ◽  
Acidic Chloride

More than 2% δ-ferrite phase is presented in type 316L stainless steels due to improvement of hot workability or welding process. In order to clarify the mechanism on how the δ-ferrite affects the corrosion resistance, electrochemical tests in a micro-droplet cell were conducted and microstructures were analyzed by TEM-EDS and SEM-EDS. Especially, the micro-droplet cell was modified at our laboratory to observe the polarization behavior of δ-ferrite phase in an acidic chloride solution. The anodic polarization behavior in both active zone and passive zone was affected by δ-ferrite. The degradation of corrosion resistance in the low potential zone with δ-ferrite phase is due to the preferential dissolution of a matrix, γ phase. It is explained with the fact that the formation of δ-ferrite lowers the concentrations of chromium and molybdenum in γ phase. It is also confirmed by potentiostatic test, EDS analyses and phase-equilibrium prediction. In addition, the micro-droplet cell and EDS analysis reveled that the pitting potential in the neutral pH solution was affected by Ca containing inclusion rather than δ-ferrite phase.

Adsorption of AuCl 4 − from Acidic Chloride Solution by Chemically Modified Lignin Based on Rice Straw

2018 ◽  
Vol 26 (2) ◽  
pp. 121-127 ◽  
Author(s):  
Baoping Zhang ◽  
Yun Liu ◽  
Zhongchen Ma ◽  
Meichen Guo ◽  
Bowen Shen
Keyword(s):  
Rice Straw ◽  
Chloride Solution ◽  
Chemically Modified ◽  
Acidic Chloride Solution ◽  
Acidic Chloride ◽  
Modified Lignin
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