Mechanistic approach for evaluation of the corrosion inhibition of potassium zinc phosphate pigment on the steel surface: Application of surface analysis and electrochemical techniques

2014 ◽  
Vol 109 ◽  
pp. 189-199 ◽  
Author(s):  
F. Askari ◽  
E. Ghasemi ◽  
B. Ramezanzadeh ◽  
M. Mahdavian
Keyword(s):  
Surface Analysis ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Zinc Phosphate ◽  
Electrochemical Techniques ◽  
Surface Application ◽  
Mechanistic Approach

scholarly journals A STUDY ON THE LOCALIZED CORROSION INHIBITION FOR MILD STEEL IN SALINE SOLUTION

2018 ◽  
Vol 56 (2) ◽  
pp. 174
Author(s):  
Nguyen Dang Nam ◽  
Pham Van Hien ◽  
Mahesh Vaka
Keyword(s):  
Surface Analysis ◽  
Corrosion Inhibition ◽  
Film Formation ◽  
Electrochemical Techniques ◽  
Analysis Data ◽  
Ion Concentration ◽  
Localized Corrosion ◽  
Protective Film ◽  
Aqueous Chloride ◽  
Inhibition Performance

In this study, 0.45 mM yttrium 4-nitrocinnamate (Y(4NO2Cin)3) embedded in various aqueous chloride solutions, which has been studied as a possible localized corrosion inhibition system using electrochemical techniques and surface analysis. Furthermore, a wire-beam electrode (WBE) exposed to NaCl solutions containing Y(4NO2Cin)3 compound. The results indicated the possible application of a WBE in simulating and monitoring the localized corrosion inhibition. Moreover, Y(4NO2Cin)3 compound showed an excellent localized corrosion inhibition at 0.01 M due to high inhibition performance and good protective film formation. It also indicated that addition of 0.45 mM Y(4NO2Cin)3 compound increased the localized corrosion inhibition with a decrease of the Clˉ ion concentration in the investigated solutions. A new method of localized corrosion inhibition estimation has been developed using a WBE which shows a consistent result with electrochemical and surface analysis data. In addition, other electrochemical techniques and surface analysis are also used for not only ensuring but also confirming the localized corrosion inhibition. 

scholarly journals Corrosion Inhibition of Carbon Steel using Dipropyl Sulphide as Inhibitor System in Sulphuric Acid Solution

2021 ◽  
Vol 33 (12) ◽  
pp. 3115-3122
Author(s):  
P. Vijayakumar ◽  
S. Valarselvan ◽  
S.S. Syed Abuthahir
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulphuric Acid ◽  
Surface Analysis ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Protective Film ◽  
Carbon Steel Surface ◽  
Loss Method

The corrosion inhibition effect of dipropyl sulphide (DPS) on carbon steel immersed in 0.5 N sulphuric acid has been evaluated at room temperature using mass loss method. The corrosion rate and inhibition efficiency was obtained from weight loss method. The corrosion inhibition efficiency increases with increase in concentration of an inhibitor. The corrosion rate decreases when increase in concentration of inhibitor. This is due to the higher concentration of inhibitor solution, which blocks the active site of a carbon steel and a protective film is formed on the carbon steel surface. Electrochemical studies have been used to confirm the formation of protective film over the carbon steel surface. This is further confirmed by surface analysis technique like FTIR spectroscopy and scanning electron microscopy. Energy dispersive analysis of X-ray was used to analyze the elements present over the carbon steel surface. Surface analysis of polished, corroded and inhibitor carbon steel surface has been evaluated by SEM. In order to study adsorption of dipropyl sulphide on carbon steel, in situ atomic force microscopy (AFM) measurements were performed in control, with and without dipropyl sulphide in 0.5 N H2SO4 solution.

scholarly journals Effect of Sulfate-Reducing Bacteria (SRB) on the Corrosion of Buried Pipe Steel in Acidic Soil Solution

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 625
Author(s):  
Lijuan Chen ◽  
Bo Wei ◽  
Xianghong Xu
Keyword(s):  
Soil Solution ◽  
Steel Surface ◽  
Pipeline Steel ◽  
Electrochemical Techniques ◽  
Sulfate Reducing Bacteria ◽  
Acidic Soil ◽  
Microbiologically Influenced Corrosion ◽  
Soil Environment ◽  
Sulfate Reducing ◽  
Reducing Bacteria

The influence of sulfate-reducing bacteria (SRB) on the corrosion behaviors of X80 pipeline steel was investigated in a soil environment by electrochemical techniques and surface analysis. It was found that SRB grew well in the acidic soil environment and further attached to the coupon surface, resulting in microbiologically influenced corrosion (MIC) of the steel. The corrosion process of X80 steel was significantly affected by the SRB biofilm on the steel surface. Steel corrosion was inhibited by the highly bioactive SRB biofilm at the early stage of the experiment, while SRB can accelerate the corrosion of steel at the later stage of the experiment. The steel surface suffered severe pitting corrosion in the SRB-containing soil solution.

scholarly journals THERMODYNAMIC PROPERTIES AND CHARACTERIZATIONS OF CHITOSAN NANO-PARTICLES CORROSION INHIBITION ON THE SURFACE OF MILD STEELIN PEAT WATER MEDIA

2016 ◽  
Vol 12 (1) ◽  
pp. 27
Author(s):  
Maria Erna ◽  
Emriadi Emriadi ◽  
Admin Alif ◽  
Syukri Arief
Keyword(s):  
Thermodynamic Properties ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Complex Compounds ◽  
Nano Particles ◽  
Water Media ◽  
Weight Loss Method ◽  
Steel Surfaces ◽  
Loss Method

The thermodynamic properties and characterizations of corrosion inhibition of chitosan nano-particles on the surface of mild steel in peat water media had been studied using weight loss method at temperatures of 30 - 50 <sup>o</sup>C. Steel surfaces were characterized by FT-IR spectra and SEM-EDS morphology photos. The research found that the value of DG<sup>o </sup>approaching -40 kJmol<sup>-</sup><sup>1</sup>. The negative value of Gibbs free energy shows that the adsorption of inhibitor molecules on the surface of mild steel was achemisorption and it occurred spontaneously. Meanwhile, the values of DH<sup>o </sup>is also negative confirming that the adsoprtion of inhibitor molecules is an exothermic process. The value of DS<sup>o </sup>obtained is positive, it indicates hat the inhibitor molecules were adsorbed spontaneously on the mild steel surface. The analysis on mild steel surfaces hows that the nano-particle chitosan was adsorbed on the steel surface to form the complex compounds.

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