Ferrous bio-oxidation byAcidithiobacillus ferrooxidansin hydrochloric acid pickling waste liquor

2014 ◽  
Vol 57 (4) ◽  
pp. 1836-1843
Author(s):  
Songyan Qin ◽  
Yonglei Xie ◽  
Lina Guo ◽  
Dan Shan ◽  
Shumei Li ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Waste Liquor ◽  
Acid Pickling

Electrochemical Behavior of 430 Ferritic Stainless Steel in HCl Solution with Different Concentration of Hydrochloric Acid

2013 ◽  
Vol 446-447 ◽  
pp. 390-393 ◽  
Author(s):  
Xiao Liang Li ◽  
Pei Yang Shi ◽  
Ying Ying Yue ◽  
Qiong Xie ◽  
Cheng Jun Liu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Low Frequencies ◽  
Positive Direction ◽  
Acid Pickling ◽  
Pickling Process ◽  
Capacitive Loop ◽  
Hcl Solution

The hydrochloric acid pickling process which is widely applied in carbon steel pickling ensures high speeds with little pollution. In this research, hydrochloric acid pickling process was introduced into stainless steel pickling to improve the surface integrity. Research indicated that the impedance spectrum obtained from 430SS in HCl solution consisted of a capacitive loop at high frequencies and an inductive loop at low frequencies. As the concentration of hydrochloric acid rose, the radiuses of the capacitive loop decreased.And the corrosion potential of 430SS in hydrochloric acid solution moved to positive direction with band to a narrow 0.1V.And high HCl concentration more markedly influenced the charge-transfer resistance.

scholarly journals Effect of Nickel Content on the Corrosion Resistance of Iron-Nickel Alloys in Concentrated Hydrochloric Acid Pickling Solutions

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Nabeel Alharthi ◽  
El-Sayed M. Sherif ◽  
Hany S. Abdo ◽  
S. Zein El Abedin
Keyword(s):  
Corrosion Resistance ◽  
Hydrochloric Acid ◽  
Electrochemical Impedance ◽  
Nickel Content ◽  
Spectroscopic Techniques ◽  
Current Time ◽  
Acid Pickling ◽  
Ni Content ◽  
Ni Alloy ◽  
The Absolute

The effect of Ni content on the resistance against corrosion of Fe-36% Ni and Fe-45% Ni alloys in 1 M hydrochloric acid pickling solution was reported. Various electrochemical and spectroscopic techniques such as potentiodynamic cyclic polarization (CPP), open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), potentiostatic current-time (PCT), and scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) have been employed. CPP measurements indicated that the corrosion current and corrosion rate recorded lower values for the alloy that had higher nickel content. OCP curves proved that the presence of high Ni content shifts the absolute potential to the positive potential direction. EIS results revealed that the surface and polarization resistances were much higher for the alloy with higher Ni content. PCT curves also showed that the absolute currents were lower for Fe-45% Ni alloy. All results were in good agreement with others and confirmed clearly that the corrosion resistance in HCl solutions for Fe-45% Ni alloy was higher than that obtained for Fe-45% Ni alloy.

Corrosion inhibition of carbon steel in hydrochloric acid solution using newly synthesized urea-based cationic fluorosurfactants: experimental and computational investigations

2020 ◽  
Vol 44 (41) ◽  
pp. 17791-17814 ◽  
Author(s):  
Hany M. Abd El-Lateef ◽  
K. Shalabi ◽  
Ahmed H. Tantawy
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Corrosion Inhibitors ◽  
Acid Pickling ◽  
Anticorrosion Properties

The results of this report show that synthesized fluorosurfactants can be applied as effective corrosion inhibitors with good anticorrosion properties for hydrochloric acid pickling of carbon steel.

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