scholarly journals Inhibitive effect of an alcoholic extract of a seaweed Sargassum Muticum in controlling corrosion of mild steel in 0.5 N HCl

2021 ◽  
Vol 10 (4) ◽  
Keyword(s):  
Mild Steel ◽  
Sargassum Muticum ◽  
Alcoholic Extract

scholarly journals Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum

2021 ◽  
Vol 62 (4) ◽  
pp. 304-315
Author(s):  
Mallika Arockiaraj ◽  
Suyambulingam Kirubavathy ◽  
Abdulhameed Al-Hashem ◽  
Rajendran Santhammal ◽  
R.M. Joany ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Metal Surface ◽  
Sargassum Muticum ◽  
Alcoholic Extract ◽  
Protective Film ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method ◽  
Ac Impedance Spectra

An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm.

scholarly journals Inhibition of the Corrosion of Mild Steel in Acid Media by Naturally Occurring Acacia Senegal

2010 ◽  
Vol 7 (4) ◽  
pp. 1220-1229 ◽  
Author(s):  
Urvija Garg ◽  
R. K. Tak
Keyword(s):  
Hydrochloric Acid ◽  
Acid Solution ◽  
Mild Steel ◽  
Steel Corrosion ◽  
Alcoholic Extract ◽  
Acacia Senegal ◽  
Acid Media ◽  
Naturally Occurring ◽  
Mild Steel Corrosion ◽  
Hcl Solution

The inhibition of corrosion of mild steel in HCl solution by naturally occurringAcacia Senegalhas been studied in relation to the concentration of inhibitor and concentration of corrosive medium. It has been observed that theAcacia Senegalalcoholic extract acts as a good corrosion inhibitor in hydrochloric acid solution and the adsorption of the extract provides a good protection against mild steel corrosion.

Corrosion Inhibition of Mild Steel in 0.5N H2SO4 Solution by Tribulus terrestris (fruit) Extract

2017 ◽  
Vol 33 (1-2) ◽  
pp. 63
Author(s):  
Suchitra Chaudhary ◽  
Rakesh K. Tak ◽  
Rajendra Kumar Duchaniya
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Electrochemical Impedance ◽  
Tribulus Terrestris ◽  
Alcoholic Extract ◽  
Fruit Extract ◽  
Langmuir Adsorption ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition efficiency of alcoholic extract of fruits of plant <em>Tribulus terrestris</em> for mild steel in 0.5N H<sub>2</sub>SO<sub>4</sub> solution has been studied in relation to concentration of inhibitor by Mass Loss, Potentiodynamic Polarisation and Electrochemical Impedance Spectroscopy methods. The results indicate that <em>Tribulus terrestris</em> fruit extract used in liquid H<sub>2</sub>SO<sub>4</sub> effectively reduces the corrosion rate of mild steel and act as a good corrosion inhibitor. It is also observed that inhibition efficiency increases with inhibitor concentration but it decreases with increase in temperature. The thermodynamic parameters reveal that the inhibition of corrosion is due to adsorption of the inhibitor on the metal surface. The negative free energy values show spontaneity of the adsorption process in accordance with Langmuir adsorption isotherm.

scholarly journals "UTILIZATION OF Ammi majus L. FRUITS EXTRACTS AS INHIBITORS FOR MILD STEEL CORROSION IN ACID MEDIA"

2006 ◽  
Vol 3 (2) ◽  
pp. 99-110 ◽  
Author(s):  
S. T. Arab ◽  
A. M. Al-Turkustani ◽  
S. Y. Al-Nami
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Acid Corrosion ◽  
Steel Corrosion ◽  
Alcoholic Extract ◽  
Free Energies ◽  
Acid Media ◽  
Mild Steel Corrosion ◽  
Ammi Majus ◽  
Coumarin Compounds

The inhibition effect of Ammi majus L. fruit extracts, alcoholic extract (A), aqueous extract (B) and defatting extract (C), on the corrosion of mild steel in 2.0M H2SO4 containing 10% EtOH at 30?C was investigated using chemical, electrochemical and scanning microscopy measurements. It was found that as the concentration of extracts increases, the rate of mild steel corrosion is decreased, which indicates that an inhibition of the corrosion process take place. The decrease of the inhibition efficiency of the extracts was given as: B > C > A, the electrochemical results showed that the extracts A, B and C, act as mixed inhibitors and the corrosion inhibition of mild steel occurred mainly by charge transfer mechanism. The scanning electron microscopy results showed that the changes (pits) on the mild steel surface is due to the effect of acid corrosion became less, the steel surface appears to be unchanged , by the extracts addition. The experimental results fit Langmuir isotherm. Values of equilibrium constant of adsorption Kads. and the standard free energies of adsorption DG?ads. for the extracts, were calculated. The effect of two coumarin compounds was studied by chemical methods in 2.0M H2SO4 containing 10% EtOH separately and in mixture of them. The results showed that: ? As the concentration of studied compounds (Xabthotoxin(I), Imperatorin (II) increased, the rate of mild steel corrosion was decreased. ? The inhibition efficency obtained from the mixture was very high and nearly the same as when the extract was used which supported that the inhibition of A. majus extract is due to the presence of coumarin compounds.

Antiplasmin Deficiency in Polycythaemia: a Form of Thrombopathy

1961 ◽  
Vol 06 (03) ◽  
pp. 445-461 ◽  
Author(s):  
S. I de Vries ◽  
M. A. J Braat-van Straaten ◽  
E Müller ◽  
M Wettermark
Keyword(s):  
Fibrinolytic Activity ◽  
Alcoholic Extract ◽  
Surgical Interventions ◽  
Fallot's Tetralogy ◽  
Naturally Occurring ◽  
Fallot’S Tetralogy

SummaryA marked fibrinolytic activity could be demonstrated in the blood of 10 patients with polycythaemia. In these cases fibrinolysis was considered the result of a deficiency an antiplasmin. It could be demonstrated that this naturally occurring inhibitor of fibrinolysis is present in normal platelets but is lacking in the patient’s own thrombocytes. This factor is probably attached to the surface of the thrombocytes. It could be removed by repeatedly washing. Lack of antiplasmin is a dysfunction of platelets and a form of thrombopathy. It does not respond on treatment with ACA or prednisone. In primary polycythaemia busulfan (Myleran) was considered to be the treatment of choice, whereas in 1 case of secundary erythrocytosis (Fallot’s tetralogy) the reaction on unroasted peanuts was unmistakable. In 4 more patients an alcoholic extract of peanuts was given, and promising results were obtained in 3 of them. The importance of this “thrombopathic type’ of fibrinolysis has been pointed out especially in view of surgical interventions.

Therapeutic efficacy of some extracts of hot pepper fruits (Capsicum annuum) and Sumac seeds (Rhus coriaria) on the growth of some isolated dermatophytes species

2018 ◽  
Vol 1 (3) ◽  
pp. 52-62
Author(s):  
Sara Omran ◽  
Abdulghani Alsamarai ◽  
Firas Razzzaq
Keyword(s):  
Antifungal Activity ◽  
Fungal Infection ◽  
Aqueous Extract ◽  
Plant Extracts ◽  
Therapeutic Efficacy ◽  
Diffusion Method ◽  
Quantitative Detection ◽  
Hot Pepper ◽  
Alcoholic Extract ◽  
Dermatology Clinic

Background: Fungal infections are one of the common skin diseases with difficulty in their treatment approach. The present efficient drugs for fungal infection are limited. Aim: To determine the therapeutic efficacy of plant extracts as alternative antifungal agents. Materials and methods: 100 clinical samples [68 from female and 32 from male] were collected during the period from March to July 2017 from subjects attending Dermatology Clinic in Salah Uldean General Hospital. Fungal infection was diagnosed with using KOH wet preparation. Fungal species identified by using conventional approach. The active ingredients existing in the plant extracts were detected and analyzed through qualitative and quantitative detection technique of chemical compounds using a high performance liquid chromatographic device (HPLC). Agar diffusion method was used to determine antifungal activity of plant extracts. Results: Direct microscopic examination showed that there were (75%) positive samples, while culture shows (67%) positive samples. The isolated dermatophytes belong to Epidermophyoton, Microsporum, and Trichophyton genus. The predominant dermatophytes were T. rubrum (25%) species. The highest frequency of infection was in the age group of 11-20 years. The sensitivity of the tested fungi to the aqueous and alcoholic plant extracts varies. Alcoholic extract of the hot pepper plant was more effective as antifungal than the aqueous extract of the same plant. However, aqueous hot pepper extracts was more effective against T. mentagrophyte than that of alcoholic extract. Additionally, alcoholic Sumac extract shows higher efficacy that aqueous extract. Conclusion: Hot pepper and Sumac extracts show antifungal activity against Microsporum canis, Trichophyton rubrum and T. mentagrophyte.

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