scholarly journals Evaluation of the Electrochemical Impedance Measurement of Mild Steel Corrosion in an Acidic Medium, in the Presence of Quaternary Ammonium Bromides

2018 ◽  
Vol 36 (6) ◽  
pp. 423-435 ◽  
Author(s):  
A Popova ◽  
A Vasilev ◽  
T Deligeorgiev
Keyword(s):  
Mild Steel ◽  
Quaternary Ammonium ◽  
Acidic Medium ◽  
Electrochemical Impedance ◽  
Impedance Measurement ◽  
Steel Corrosion ◽  
Mild Steel Corrosion

scholarly journals A Study of Mild Steel Corrosion UsingAdhatoda Vasica(AV) Extract as Inhibitor in Different Acid Medium

2010 ◽  
Vol 7 (4) ◽  
pp. 1284-1289 ◽  
Author(s):  
P. Matheswaran ◽  
A. K. Ramasamy
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Acid Medium ◽  
Acidic Medium ◽  
Active Sites ◽  
Mixed Type ◽  
Steel Corrosion ◽  
Adhatoda Vasica ◽  
Mild Steel Corrosion ◽  
Inhibitive Action

Corrosion behavior of mild steel in acidic medium usingAdhatoda Vasica(AV) extract was investigated. The inhibitive effective ofAdhatoda Vasicaon the corrosion of mild steel in different acidic medium has been studied by weight loss and polarization methods. The Ecorrvalues are shifted slightly towards negative side in presence of inhibitors which indicate the inhibitors inhibit the corrosion of mild steel in acids solution by controlling both anodic and cathodic reactions due to the blocking of active sites on the metal surface. It is evident that inhibitors bring about considerable polarization of the cathode as well as anode. It was, therefore, inferred that the inhibitive action is of mixed type.

scholarly journals Inhibiting Effects of Rabeprazole Sulfide on the Corrosion of Mild Steel in Acidic Chloride Solution

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
M. K. Pavithra ◽  
T. V. Venkatesha ◽  
M. K. Punith Kumar
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Protection Efficiency ◽  
Langmuir Adsorption ◽  
Kinetic And Thermodynamic Parameters ◽  
Mild Steel Corrosion ◽  
Acidic Chloride Solution ◽  
Acidic Chloride ◽  
Mixed Type Inhibitor

The corrosion inhibition effect of Rabeprazole sulfide (RS) on mild steel in 1 M hydrochloric acid (HCl) was investigated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and chronoamperometric measurements. Protection efficiency of RS increases with the concentration and decreases with the rise in temperature. Adsorption of RS on mild steel surface in 1 M HCl follows Langmuir adsorption isotherm. The kinetic and thermodynamic parameters governing the adsorption process were calculated and discussed. The polarization results suggest that RS performed as an excellent mixed-type inhibitor for mild steel corrosion in 1 M HCl.

scholarly journals Mitigation of Mild Steel Corrosion in Acidic Solution Using Inhibitor

2011 ◽  
Vol 8 (s1) ◽  
pp. S53-S60 ◽  
Author(s):  
M. Vishnudevan
Keyword(s):  
Mild Steel ◽  
Sodium Benzoate ◽  
Inhibition Efficiency ◽  
Acidic Solution ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Trisodium Citrate ◽  
Tafel Polarization ◽  
Mild Steel Corrosion ◽  
Maximum Inhibition

The inhibition efficiency of mild steel corrosion in HCl acidic solution containing various concentrations of mixed inhibitors were evaluated by conducting Tafel polarization and electrochemical impedance studies. The mixed inhibitors used in this present investigation were trisodium citrate and sodium benzoate. In this present investigation 0.01 N to 0.1 N concentrations of HCl was used at 30°C. Sodium benzoate present in the mixed inhibitive system enhanced the inhibition efficiency through chemisorptions. The maximum inhibition efficiency ( 95.4%) was obtained for the mixed inhibitive system containing 0.05 M citrate and 0.5 M benzoate in 0.1 N HCl.

scholarly journals The Inhibition of Mild Steel Corrosion in Sulfuric Acid by New Dapsone Derivatives

2014 ◽  
Vol 10 (3) ◽  
pp. 2388-2402 ◽  
Author(s):  
M.P. Chakravarthy ◽  
Dr. K. N. Mohana ◽  
C.B. Pradeep Kumar
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Tafel Polarization ◽  
New Class ◽  
Mild Steel Corrosion ◽  
Langmuir Isotherm Model ◽  
Polarization Studies ◽  
Corrosion Inhibition Efficiency

Dapsone derivatives Viz., 4, 4’-sulfonylbis(N-((1H-pyrrol-2-yl)methylene)aniline) (SBPMA) and 2-dimethylamino-5-[(4-{4-[(4-dimethylamino-benzylidene)-amino]-benzenesulfonyl}-phenylimino)-methyl]-benzene (DBBPB), a new class of corrosion inhibitors have been synthesized and their corrosion inhibition efficiency on mild steel in 0.5 M H2SO4 was investigated by mass loss,  Tafel polarization and AC impedance measurements. Potentiodynamic polarization studies showed that, these compounds behave as mixed type of corrosion inhibitors. The adsorption process was found to obey Langmuir isotherm model. Electrochemical impedance spectroscopy (EIS) studies revealed that polarization resistance (RP) increases and double layer capacitance (Cdl) decreases as the concentration of the inhibitors increases. Various thermodynamic parameters for the adsorption of inhibitors on mild steel were computed and discussed. FTIR, EDX and SEM analyses were performed to study the film persistency of the inhibitors.

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