scholarly journals Evaluating the Behavior of Aluminum Corrosion in Hydrochloric Acid in the Presence Aqueous Extract of Olive Seeds

2015 ◽  
Vol 04 (03) ◽  
pp. 1018-1027 ◽  
Author(s):  
Aisha M. Al-Turkustani, Khadijah M. Emran
Keyword(s):  
Hydrochloric Acid ◽  
Aqueous Extract ◽  
Aluminum Corrosion ◽  
Olive Seeds

Anti-Corrosive Effect of Jordanian-Bay- Leaves Aqueous Extract on Mild Steel in 1.0 M Hydrochloric Acid Solution

2021 ◽  
Vol 17 ◽  
pp. 614-618
Author(s):  
Nawal H. Bahtiti ◽  
Ibrahim Abdel-Rahaman
Keyword(s):  
Hydrochloric Acid ◽  
Adsorption Isotherm ◽  
Aqueous Extract ◽  
Corrosion Inhibitors ◽  
Polarization Technique ◽  
Corrosive Effect ◽  
The Impact ◽  
Natural Inhibitors ◽  
Temkin Adsorption Isotherm ◽  
Hcl Solution

Natural inhibitors are the most crucial manner to lessen the corrosion price of various business metals. There are several strategies being used with corrosion inhibitors. One technique being used is the Electrochemical strategies. The gain with this technique is their brief size time and mechanistic information. It is beneficial in the corrosion's layout safety techniques besides the layout of the brand new inhibitors, there are 3 styles of corrosion inhibitors as anodic inhibitors, cathodic inhibitors, over one inhibitor. The corrosion inhibition of slight metallic in 1.0 M HCl solution with the aid of using Jordanian -Bay- leaves extract has been studied with the use of potentiodynamic polarization technique. Results received a display that Bay- leaves aqueous extract behaves as an anodic inhibitor for slight metallic in 1.0 M HCl solution. The inhibitor capabilities thru adsorption following Temkin adsorption isotherm. The impact of parameters like temperature and inhibitor awareness at the corrosion of slight metallic has additionally been studied.

Inhibition of Aluminum Corrosion in Hydrochloric Acid by n-, Di-n- and Tri-n-Butylamines

CORROSION ◽  
1966 ◽  
Vol 22 (3) ◽  
pp. 53-59 ◽  
Author(s):  
V. K. V. UNNI ◽  
T. L. RAMA CHAR
Keyword(s):  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Pure Aluminum ◽  
Acid Solutions ◽  
Inhibitor Concentration ◽  
Inhibitor Efficiency ◽  
Weight Losses ◽  
Hydrochloric Acid Solutions ◽  
Immersion Period ◽  
Aluminum Corrosion

Abstract Weight losses of aluminum in hydrochloric acid are diminished in the ranges 16–75 for n-; 40–90 for di-n~ and 50–98percent for tri-n-butylamine. Inhibitor efficiency increases with acid concentration up to 1.25 or 1.5 N, depending on the inhibitor and is practically constant thereafter. Efficiency increases with increased inhibitor concentration up to a certain value, then remains constant. Optimum inhibitor concentration depends on acid concentration and immersion period. Experimental results indicate corrosion of pure aluminum in hydrochloric acid solutions is essentially under cathodic control and inhibition by amines is by adsorption on cathodic areas. A similar mechanism is indicated for aluminum alloyed with manganese.

scholarly journals Aluminum Corrosion Inhibition by 7-(Ethylthiobenzimidazolyl) Theophylline in 1M Hydrochloric Acid: Experimental and DFT Studies

2018 ◽  
Vol 3 (04) ◽  
pp. 41-53 ◽  
Author(s):  
N’guessan Yao Silvère Diki ◽  
Gbe Gondo Didier Diomandé ◽  
Sagne Jacques Akpa ◽  
Augustin Ouédraogo ◽  
Lemeyonouin Aliou Guillaume Pohan ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Density Functional ◽  
Physical Adsorption ◽  
Basis Set ◽  
Aluminum Surface ◽  
Protective Film ◽  
Tafel Polarization ◽  
Hydrochloric Acid Medium ◽  
Aluminum Corrosion ◽  
Langmuir Isotherm Model

Inhibitive properties of 7-(ethylthiobenzimidazolyl) theophylline (7-ETBT) molecule for the corrosion of aluminum (Al) in one molar hydrochloric acid medium have been investigated using mass loss and Tafel polarization methods. The results suggest spontaneous and predominant physical adsorption of 7-ETBT on the metal surface which obeys Langmuir isotherm model. The studied inhibitor showed excellent inhibition efficiency up to 94.07 % at 298 K for its optimum concentration (2 mM). Moreover, Tafel polarization method revealed that 7-ETBT is a cathodic-type inhibitor. Further investigation on the morphology using scanning electron microscopy (SEM) has confirmed the existence of a protective film of inhibitor molecules on aluminum surface. Theoretical approach for the performance of 7-ETBT as Al corrosion inhibitor is also done using Density Functional Theory (DFT) level with B3LYP exchange correlation functional for 6-31G (d, p) basis set. The results provided by this theoretical study are consistent with the experimental data. All the results have shown an evidence of the effectiveness of the inhibitive effect of 7-ETBT on Al.

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