scholarly journals The use of Robinia pseudoacacia L fruit extract as a green corrosion inhibitor in the protection of copper-based objects

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Vahid Pourzarghan ◽  
Bahman Fazeli-Nasab
Keyword(s):  
Sodium Chloride ◽  
Corrosion Inhibition ◽  
Aqueous Extract ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Control Sample ◽  
Fruit Extract ◽  
Bronze Alloy ◽  
Sem Images ◽  
Green Inhibitor

AbstractThe most important inhibitors used in bronze disease are BTA and AMT. While these inhibitors control corrosion, they are toxic and cancerous. In this study, the acacia fruit extract (200 ppm to 1800 ppm) was used to the prevention of corrosion inhibition of bronze alloy in corrosive sodium chloride solution 0.5 M, for 4 weeks consecutively. The Bronze alloy used in this research, was made based on the same percentage as the ancient alloys (Cu-10Sn). IE% was used to obtain the inhibitory efficiency percentage and Rp can be calculated from the resistance of polarization. SEM–EDX was used to evaluate the surfaces of alloy as well as inhibitory. The experiment was conducted in split plot design in time based on the RCD in four replications. ANOVA was performed and comparison of means square using Duncan's multiple range test at one percent probability level. The highest rate of corrosion inhibition (93.5%) was obtained at a concentration of 1800 ppm with an increase in the concentration of the extract, corrosion inhibition also increased, i.e., more bronze was prevented from burning. Also, the highest corrosion inhibitory activity of Acacia extract (79.66) was in the second week and with increasing duration, this effect has decreased. EDX analysis of the control sample matrix showed that the amount of chlorine was 8.47%wt, while in the presence of corrosive sodium chloride solution, after 4 weeks, the amount of chlorine detected was 3.20%wt. According to the morphology (needle and rhombus) of these corrosion products based on the SEM images, it can be said, they are the type of atacamite and paratacamite. They have caused bronze disease in historical bronze works. The green inhibitor of Acacia fruit aqueous extract can play an effective role in inhibiting corrosion of bronze, but at higher concentrations, it became fungal, which can reduce the role of Acacia fruit aqueous extract and even ineffective. To get better performance of green inhibitors, more tests need to be done to improve and optimize.

scholarly journals The use of Robinia pseudoacania L fruit extract as a green corrosion inhibitor in the protection of historical bronze objects

2021 ◽  
Author(s):  
Vahid Pourzarghan ◽  
Bahman Fazeli-Nasab
Keyword(s):  
Sodium Chloride ◽  
Corrosion Inhibition ◽  
Aqueous Extract ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Control Sample ◽  
Fruit Extract ◽  
Bronze Alloy ◽  
Green Inhibitor ◽  
Effective Role

Abstract The phenomenon of bronze disease is considered as the most important factor in the destruction of bronze objects. Different methods have been proposed to deal with it. The most important inhibitors used in this regard are BTA and AMT. While these inhibitors control the corrosion, they are toxic and cancerous. In ideal conditions, these inhibitors are able to slow down the activity of chlorine ion, but leave some side effects after a period of treatment. Today, plant extracts are used for this purpose. In this study, Robinia pseudoacania L extract was selected for this purpose.The acacia fruit extract (200ppm to 1800 ppm) was used to the prevention of corrosion inhibition of bronze alloy in corrosive sodium chloride solution 0.5 M. The Bronze alloy used in this research, was made based on the same percentage as the ancient alloys (Cu-10Sn). This alloy was used for the effect of corrosion inhibitors in the potentiostat device, the weight loss method. The experiment was conducted in split plot desgin in time based on the randomized complete design in four replications. Mean comparison showed that the highest rate of corrosion inhibition (93.5%) was obtained at a concentration of 1800 ppm and with increasing the concentration of the extract, corrosion inhibition also increased. EDX analysis of the control sample matrix showed that the amount of chlorine, which is the most important factor in the destruction of bronze disease, was 8.47%wt while in the presence of corrosive sodium chloride solution, after 4 weeks, the amount of chlorine detected was 3.20%wt. According to the morphology (needle and rhombus) of these corrosion products based on the SEM image, it can be said that they are of the type of atacamite and paratacamite that have caused bronze disease in historical bronze works. At higher concentrations of acacia extract, the presence and growth of fungi has been observed, which can cause poor performance of acacia extract in the long run.the green inhibitor of acacia fruit aqueous extract can play an effective role in inhibiting corrosion of bronze, but at higher concentrations, it became fungal, which can reduce the role of acacia fruit aqueous extract and even ineffective. Because green inhibitors can play an effective role in preventing the corrosion of bronze works. But to get better performance of these inhibitors, more tests need to be done to improve and optimize.

scholarly journals The Use of Robinia Pseudoacania L Fruit Extract as a Natural Corrosion Inhibitor in the Protection of Historical Bronze Objects

2021 ◽  
Author(s):  
Vahid Pourzarghan ◽  
Bahman Fazeli-Nasab
Keyword(s):  
Sodium Chloride ◽  
Corrosion Inhibition ◽  
Aqueous Extract ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Control Sample ◽  
Poor Performance ◽  
Fruit Extract ◽  
Bronze Alloy ◽  
Effective Role

Abstract Background: The phenomenon of bronze disease is considered as the most important factor in the destruction of bronze objects. Different methods have been proposed to deal with it. The most important inhibitors used in this regard are BTA and AMT. While these inhibitors control the corrosion, they are toxic and cancerous. In ideal conditions, these inhibitors are able to slow down the activity of chlorine ion, but leave some side effects after a period of treatment. Today, plant extracts are used for this purpose. In this study, Robinia pseudoacania L extract was selected for this purpose.Material and methods: The acacia fruit extract (200ppm to 1800 ppm) was used to the prevention of corrosion inhibition of bronze alloy in corrosive sodium chloride solution 0.5 M. The Bronze alloy used in this research, was made based on the same percentage as the ancient alloys (Cu-10Sn). This alloy was used for the effect of corrosion inhibitors in the potentiostat device, the weight loss method. The experiment was conducted in split plot desgin in time based on the randomized complete design in four replications.Results: Mean comparison showed that the highest rate of corrosion inhibition (93.5%) was obtained at a concentration of 1800 ppm and with increasing the concentration of the extract, corrosion inhibition also increased. EDX analysis of the control sample matrix showed that the amount of chlorine, which is the most important factor in the destruction of bronze disease, was 8.47%wt while in the presence of corrosive sodium chloride solution, after 4 weeks, the amount of chlorine detected was 3.20%wt. According to the morphology (needle and rhombus) of these corrosion products based on the SEM image, it can be said that they are of the type of atacamite and paratacamite that have caused bronze disease in historical bronze works. At higher concentrations of acacia extract, the presence and growth of fungi has been observed, which can cause poor performance of acacia extract in the long run.Conclusion: the natural inhibitor of acacia fruit aqueous extract can play an effective role in inhibiting corrosion of bronze, but at higher concentrations, it became fungal, which can reduce the role of acacia fruit aqueous extract and even ineffective. Because natural inhibitors can play an effective role in preventing the corrosion of bronze works. But to get better performance of these inhibitors, more tests need to be done to improve and optimize.

Corrosion inhibition of mild steel byCalotropisproceraleaves extract in a CO2saturated sodium chloride solution

2016 ◽  
Vol 30 (23) ◽  
pp. 2523-2543 ◽  
Author(s):  
Taleb Ibrahim ◽  
Elron Gomes ◽  
Ime B. Obot ◽  
Mustafa Khamis ◽  
Mohamed Abou Zour
Keyword(s):  
Sodium Chloride ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Chloride Solution ◽  
Sodium Chloride Solution

Inhibition of mild steel corrosion in sodium chloride solution by apricot waste extract obtained from different solvent systems

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Viktoria Vorobyova ◽  
Margarita Skiba
Keyword(s):  
Sodium Chloride ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Antioxidant Properties ◽  
Oxidation Products ◽  
Total Phenolic ◽  
Content Type ◽  
Apricot Pomace

Purpose This paper aims to investigate influence of extraction solvent on the efficacy of apricot pomace extract (APE) as a sustainable corrosion inhibitor for mild steel in sodium chloride solution. Design/methodology/approach The chemical profiles of the extracts were analyzed using gas chromatography–mass spectrometry. Total phenolic, total flavonoid content and antioxidant properties of the extracts were determined. Besides, gravimetric, potentiodynamic polarization and atomic force microscopy were used to study the corrosion inhibition. The effect of immersion period on inhibition efficiency was evaluated. The reaction mechanism of the inhibitor was also discussed. Findings Corrosion inhibition decreasing is in the following order: solution of 2-propanol/ethanol apricot pomace (E/PAPE) extract > ethanol (EAPE) > 2-propanol (PAPE). The gravimetric, polarization measurements and surface analysis revealed that the growth of inhibitory properties is prolonged, and corrosion rate reduction after 40–48 h of exposure was studied. Practical implications APEs play an important role in the corrosion inhibition of mild steel in sodium chloride solution. Moreover, its application is potentially possible in industries. Social implications The results contribute to the integrated valorization of food waste. Originality/value The different compositions of the conversion/oxidation products of organic substances in solution were studied. The formation of polymerized flavanol-aldehyde adducts and oxidized quinone compounds or tautomers structures because of extract transformation in water causes main corrosion reduction in 40–48 h.

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