Experimental and Theoretical Approach on the Enhanced Inhibitory Effect of Tetracyclic Triterpenes for Stainless Steel Corrosion in Sulfuric Acid

2019 ◽  
Vol 50 (6) ◽  
pp. 3002-3012 ◽  
Author(s):  
Yassine Koumya ◽  
Rachid Idouhli ◽  
Ahlam Sayout ◽  
Abdesselam Abouelfida ◽  
Abdelaziz Benyaich ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Theoretical Approach ◽  
Steel Corrosion ◽  
Inhibitory Effect

Inhibitory effect of Pistacia khinjuk aerial part extract for carbon steel corrosion in sulfuric acid and hydrochloric acid solutions

2019 ◽  
Vol 74 (6) ◽  
pp. 1799-1815 ◽  
Author(s):  
Nasrin Soltani ◽  
Nahid Tavakkoli ◽  
Abdolmohammad Attaran ◽  
Batoul Karimi ◽  
Maryam Khayatkashani
Keyword(s):  
Sulfuric Acid ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Aerial Part ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Acid Solutions ◽  
Hydrochloric Acid Solutions ◽  
Pistacia Khinjuk

Protective afteraction of inhibitor IFKhAN-92 during chromium-nickel stainless steel corrosion in sulfuric acid

2020 ◽  
pp. 23-31
Author(s):  
Ya.G. Avdeev ◽  
◽  
Yu.B. Makarychev ◽  
D.S. Kuznetsov ◽  
◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Steel Surface ◽  
Outer Part ◽  
Protective Layer ◽  
Steel Corrosion ◽  
Metallic Phase ◽  
Organic Layer ◽  
Polymer Complex ◽  
Protective Layers

The protective polymolecular layers formed on the surface of 12Kh18N10T chromium-nickel stainless steel in a solution of sulfuric acid with IFKhAN-92 (a triazole derivative) added is shown to have the protective afteraction in the same acid. The effectiveness of the protective afteraction of mixtures containing IFKhAN-92 is determined by the time of preliminary adsorption of the inhibitor, its concentration in the solution of preliminary adsorption, the temperatures of the solution of preliminary adsorption of the inhibitor and the background acid solution. The layers formed on steel by the IFKhAN-92 + KNCS and IFKhAN-92 + KI compositions have the highest protective afteraction. These layers protect steel at 80 °С in the background 2 M H2SO4. An increase in temperature of the solutions of preliminary adsorption of inhibitors enhances their protective afteraction, which indicates chemical nature of the interaction of the inhibitor molecules with the steel surface. The composition and the structure of the protective layers formed on the steel surface was studied by XPS analysis. The protective layer is chemically bonded to the phase of hydroxides and oxides of Fe, Cr and Ni, adjacent to the metallic phase. The lower part of the protective polymolecular layer of the organic inhibitor consists of a polymer complex formed by molecules of IFKhAN-92 and metal cations (Fe, Cr and Ni). The outer part of the protective organic layer consists of physically adsorbed molecules IFKhAN-92, easily removed from the metal surface during ultrasonic washing of samples.

Study on the Complex of Sodium Tungstate and Urotropine as Inhibitors against Stainless Steel Corrosion in the NaCl Solution

2011 ◽  
Vol 689 ◽  
pp. 450-454 ◽  
Author(s):  
Qiang Song ◽  
Xing Qi Qiu
Keyword(s):  
Stainless Steel ◽  
Sodium Tungstate ◽  
Total Concentration ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
304 Stainless Steel ◽  
Nacl Solution ◽  
Weight Loss Method ◽  
Synergistic Inhibitory Effect ◽  
Loss Method

The corrosion weight loss method and polarization curve measurement were conducted to study the effects of the complex inhibitor of sodium tungstate and urotropine on the corrosion of 304 stainless steel in the 3.5% NaCl solution. The results indicated that the complex inhibitor has good synergistic inhibitory effect for stainless steel in the NaCl solution. Combining sodium tungstate and urotrpine at a total concentration of 500 mg/L, when the mass ratio of sodium tungstate to urotrpine was 7:3, the inhibitory effect was optimum. In addition, the probable inhibitory mechanism was analyzed.

Inhibitory effect of L-Threonine and L-Lysine and influence of surfactant on stainless steel corrosion in artificial body solution

2021 ◽  
pp. 116939
Author(s):  
Milan Radovanović ◽  
Marija Petrović Mihajlović ◽  
Žaklina Tasić ◽  
Ana Simonović ◽  
Milan Antonijević
Keyword(s):  
Stainless Steel ◽  
Steel Corrosion ◽  
Inhibitory Effect

scholarly journals A Synergistic Effect between Stearic Acid and (+)-α-Tocopherol as a Green Inhibitor on Ferritic Stainless Steel Corrosion Inhibition in 3.0% NaCl Solution

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 971
Author(s):  
Regina Fuchs-Godec
Keyword(s):  
Stainless Steel ◽  
Stearic Acid ◽  
Ferritic Stainless Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Low Carbon ◽  
Nacl Solution ◽  
Water Contact ◽  
Green Inhibitor

The synergistic inhibitory effect of stearic acid and (+)-α-tocopherol (E307) as a green inhibitor within a highly hydrophobic layer on the corrosion of low-carbon ferritic stainless steels was investigated in 3.0 wt% NaCl solution at 25 °C, focusing on long-term immersion tests. For a broader characterisation of the surface properties, especially the modified surfaces, of the samples used, the following methods were chosen: SEM was used to investigate the surface morphologies, the water contact angle to examine the wettability, while the corrosion resistance was investigated by potentiodynamic measurements and electrochemical impedance spectroscopy. The inhibition efficiency for modified ferritic stainless steel surfaces reached more than 99% after 1 h of immersion and remained the same after 5 days immersion testing when the surfaces were modified with (SA + 2.0 wt% E307) and more than 97% with (SA + 0.5 wt% E307) under the same test conditions.

scholarly journals Evaluation of 304 Stainless Steel Corrosion in Sulfuric Acid and Ethanol Media

2015 ◽  
Vol 17 (2) ◽  
Author(s):  
Osmar dos Reis Antunes Junior ◽  
Aline Viomar ◽  
Emilli Antônio ◽  
Everson do Prado Banczek ◽  
Paulo Rogério Pinto Rodrigues ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Steel Corrosion ◽  
304 Stainless Steel

scholarly journals Synthesis, Electrochemical, Thermodynamic, and Quantum Chemical Investigations of Amino Cadalene as a Corrosion Inhibitor for Stainless Steel Type 321 in Sulfuric Acid 1M

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Y. Koumya ◽  
R. Idouhli ◽  
A. Oukhrib ◽  
M. Khadiri ◽  
A. Abouelfida ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Inhibitor ◽  
Quantum Chemical ◽  
Diffusion Processes ◽  
Inhibitory Effect ◽  
Steel Type ◽  
Anionic Species ◽  
Eis Measurements ◽  
Protonated Molecules

The corrosion of stainless steel is one of the major industries’ issues that gained wide interest among researchers. It became necessary to develop and apply eco-friendly approaches to corrosion control. This work explores the inhibitory effect of a newly synthesized amino cadalene (ACM) on the corrosion of stainless steel type 321 in sulfuric acid 1M. Particularly, the experimental study consisting of electrochemical and surface analyses was conducted in conjunction with a theoretical approach. The electrochemical results showed that ACM acted as a mixed-type corrosion inhibitor and the inhibition efficiency attained 91% at 10−3M. EIS measurements revealed that both metal charge transfer and diffusion processes are involved in the interfacial metal/solution reactions. The interfacial mechanism is thoroughly investigated; the physisorption of the protonated molecules was preceded by the formation of a negative layer due to adsorption of the solution anionic species. The experimental insights are corroborated with the quantum chemical calculations.

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