Corrosion Inhibition of Ocimum tenuiflorum (Tulasi) Leaves Extract as a Green Inhibitor for Zinc in H2SO4

2018 ◽  
Vol 8 (1) ◽  
pp. 1-9
Author(s):  
Venkata Naga Baji Tokala
Keyword(s):  
Corrosion Inhibition ◽  
Green Inhibitor ◽  
Ocimum Tenuiflorum

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 Synergistic Effect Between Gum Exudates of Eucalyptus Globles and 2,6-Diphenyl-3-Methylpiperidin-4-one on Corrosion Inhibition of MS in 1N HCl

2018 ◽  
Vol 34 (5) ◽  
pp. 2570-2576
Author(s):  
Dheenadhayalan S. ◽  
Roja R. ◽  
Nijarubini V. ◽  
Mallika J
Keyword(s):  
Synergistic Effect ◽  
Corrosion Inhibition ◽  
Mixed Type ◽  
Gravimetric Method ◽  
Green Inhibitor ◽  
Impedance Measurements ◽  
Mechanism Of Inhibition ◽  
Maximum Inhibition ◽  
Inhibition Potency ◽  
Binary Combination

Gum exudates of eucalyptus globles (GEG) was identified as green inhibitor for MS dissolution in 1N HCl using gravimetric method at 303-323K. Efficiency of GEG was synergistically increased with addition of 2,6-diphenyl-3methyl-piperidin-4-one (3MDPP). The binary combination of GEG and 3MDPP shows maximum inhibition potency and their Sθ value is >1 indicating that synergism exists between GEG and 3MDPP. Mechanism of inhibition of inhibitors on MS is physisorption and it obeys Langmuir’s isotherm. Polarization and impedance measurements confirm that inhibitors act as mixed type.

scholarly journals Corrosion and corrosion inhibition of cast Iron in hydrochloric acid (HCl) solution by cantaloupe (Cucumis melo) as green inhibitor

2015 ◽  
Vol 9 (3) ◽  
pp. 39-49 ◽  
Author(s):  
M Emran Khadijah ◽  
O Al Ahmadi Arwa ◽  
A Torjoman Bayan ◽  
M Ahmed Najla ◽  
N Sheekh Sara
Keyword(s):  
Cast Iron ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Cucumis Melo ◽  
Green Inhibitor ◽  
Hcl Solution
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