Inhibition of acid corrosion of carbon steel using aqueous extract of olive leaves

Abstract Corrosion rate data are presented for low carbon steel in (1) a combination of sulfur dioxide, water vapor and air, and (2) aqueous solutions of sulfurous acid in the absence of air, at ordinary temperature. Information as to the nature of the corrosion products is presented and it is shown that this depends on the place in which the corrosion takes place to an important extent.

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Electrochemical investigations of naphthenic acid corrosion for carbon steel and the inhibitive effect by some ethoxylated fatty acids

Electrochimica Acta ◽

10.1016/j.electacta.2007.07.009 ◽

2007 ◽

Vol 52 (28) ◽

pp. 8105-8110 ◽

Cited By ~ 24

Author(s):

M.A. Deyab ◽

H.A. Abo Dief ◽

E.A. Eissa ◽

A.R. Taman

Keyword(s):

Fatty Acids ◽

Carbon Steel ◽

Acid Corrosion ◽

Naphthenic Acid

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The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1201/1/012079 ◽

2021 ◽

Vol 1201 (1) ◽

pp. 012079

Author(s):

S B Gjertsen ◽

A Palencsar ◽

M Seiersten ◽

T H Hemmingsen

Keyword(s):

Carbon Steel ◽

Corrosion Rate ◽

Organic Acid ◽

Carbonic Acid ◽

Acid Corrosion ◽

Iron Concentration ◽

Critical Factor ◽

Steel Corrosion ◽

Carbon Steels ◽

Corrosion Rates

Abstract Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to investigate how the corrosion rates on carbon steel is affected by acids typically present in the transported pipeline fluids. This investigation may contribute to the development of improved models. In a series of experiments, the corrosion rate differences for pure CO2 (carbonic acid) corrosion and pure organic acid corrosion (acetic acid and formic acid) on X65 carbon steel were investigated at starting pH values; 4.5, 5.3, or 6.3. The experiments were conducted in deaerated low-salinity aqueous solutions at atmospheric pressure and temperature of 65 °C. The corrosion rates were evaluated from linear polarization resistance data as well as mass loss and released iron concentration. A correlation between lower pH values and increased corrosion rates was found for the organic acid experiments. However, the pH was not the most critical factor for the rates of carbon steel corrosion in these experiments. The experimental results showed that the type of acid species involved and the concentration of the undissociated acid in the solution influenced the corrosion rates considerably.

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Study the Effects of Olive Leaves Extracts in the activity of the enzyme GOT and their Biological Activities

Baghdad Science Journal ◽

10.21123/bsj.14.1.48-59 ◽

2017 ◽

Vol 14 (1) ◽

pp. 48-59

Author(s):

Baghdad Science Journal

Keyword(s):

Aqueous Extract ◽

Large Scale ◽

Chemical Elements ◽

Biological Activities ◽

Olive Tree ◽

Food Preservation ◽

The Body ◽

Aqueous Extracts ◽

Olive Leaf ◽

Olive Leaves

The olive tree, has been used it is important plant for the time being some of their parts on a large scale in the treatment of gastrointestinal disorders and stimulate circulation . Moreover, it is used as antibacterial material and also to address some of the respiratory system, diabetes, food preservation osteoporosis. This study involved the collection of olive leaves from different areas in Baghdad / Iraq. These leaves have been harvested, wash it, then dried and crushed, where the study aimed to identify the active ingredients and chemical elements in the olive leaf as well as its effect on the action of GOT enzyme .The study showed that the aqueous extracts (cold and hot) of the olive leaves powder are acidic in nature pH values are of (5.74 and 5.40) for the aqueous extracts hot and cold respectively. Study revealed the extract contain the a collection of Glycosides, tannins, phenolic compounds, resins, flavonoids, alkaloids, terpenes and compound Alaolurobin. The study also showed ability to activate the enzyme GOT in cold aqueous extract (8.36%). and the percentage (27.35%) of hot aqueous extract. That can be analyzed to the presence of higher concentrations of the active compounds in hot aqueous extract compared with cold aqueous extract especially tannins working to activate enzymes carrier in the cell membrane in the body. The study showed that the analysis of thin layer chromatography, liquid high-performance, ( TLC, HPLC) in extract compounds of phenols olive leaf using a mixture (chloroform, acetic acid) and a 2:5 was more impact in the Gram-positive Staphylococcus aureus, while less impact in a negative Gram Salmonella typhimurium. As proved accurate analysis of the chemical elements in powder of plant leaf olive tree and at different concentrations contain of chemical elements Major estimated by (g /kg) and trace estimated by (mg/kg). Since the existence of these elements led to increasing of enzymatic effectiveness through an increase process of activity the enzyme (GOT), which plays role of important in our bodies being gives indication of the nature of the work and effectiveness of the activity of some members of the body (liver, kidney, pancreas, etc.).

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Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-05-2013-1266 ◽

2014 ◽

Vol 61 (5) ◽

pp. 300-306 ◽

Cited By ~ 6

Author(s):

B.P. Markhali ◽

R. Naderi ◽

M. Sayebani ◽

M. Mahdavian

Keyword(s):

Carbon Steel ◽

Hydrochloric Acid ◽

Organic Compounds ◽

Corrosion Inhibitors ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Acid Corrosion ◽

Molecular Structures ◽

Inhibition Mechanism ◽

Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

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