scholarly journals Corrosion inhibition effect of 1-butyl-3-methyl-1H- benzimidazolium iodide for 2205 duplex stainless steel in hydrochloric acid solution

2020 ◽  
pp. 3504-3516
Author(s):  
Xiong Zhang ◽  
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Duplex Stainless Steel ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Inhibition Effect ◽  
2205 Duplex Stainless Steel

scholarly journals Pickling Behavior of Duplex Stainless Steel 2205 in Hydrochloric Acid Solution

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Huaying Li ◽  
Aichun Zhao
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Duplex Stainless Steel ◽  
Oxide Scale ◽  
Hydrochloric Acid Solution ◽  
Outer Layer ◽  
Oxide Scales ◽  
2205 Duplex Stainless Steel ◽  
Pickling Process

The oxide-scale structure and pickling behavior of oxided 2205 duplex stainless steel in the electrolytes containing hydrochloric acid were investigated. The oxide scales mainly consist of two layers: the outer layer is dense Fe2O3, and the inner granular is FeCr2O4 spinel. During the pickling process, pittings form around the boundaries of FeCr2O4 particles or interfaces of two kinds of oxides, which results in that the electrolyte can directly react with the chromium-depleted layer along the pittings to produce an “undercut” effect so that the pickling efficiency is improved markedly. The pickling mechanism was discussed, and the model was established.

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