Investigation of Mild Steel Corrosion Rate In San Diego Harbor

Abstract The basic corrosion rate at San Diego has been determined by exposure of an extensive series of mild steel panels for 6, 12, and 18 months. The corrosion rate as determined by weight loss, and the degree of pitting determined by pit depth measurements was measured for unprotected panels, and for three different levels of cathodic protection. The basic corrosion rate for unprotected panels over the one-year exposure was 25.8 mdd and the greatest pit depth found exceeded 60 thousandths of an inch. The fully protected panels suffered virtually no corrosion while the partially protected panels had a corrosion rate of 8.3 mdd. However, the greatest pit depth found on the partially protected panels was only 9 mils. 6.2.3, 2.2.2, 3.2.2, 5.2.1

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Corrosion Inhibitors for Carbon Tetrachloride—Water Vapor Atmospheres

CORROSION ◽

10.5006/0010-9312-15.9.15 ◽

1959 ◽

Vol 15 (9) ◽

pp. 15-17 ◽

Cited By ~ 4

Author(s):

K. W. CALKINS ◽

R. W. HAWLEY

Keyword(s):

Water Vapor ◽

Carbon Tetrachloride ◽

Corrosion Rate ◽

Mild Steel ◽

Corrosion Inhibitors ◽

Steel Corrosion ◽

Corrosion Mechanism ◽

Effective Inhibitor ◽

Mild Steel Corrosion ◽

Water Vapor Atmosphere

Abstract The use of various inhibitors for the prevention of mild steel corrosion in a system of carbon tetrachloride and water vapor was investigated. An attempt also was made to establish a corrosion mechanism. Of the 48 inhibitors tested, 2-aminoethanol appeared to be the most effective. It was found that 0.4 percent by weight of 2-aminoethanol in carbon tetrachloride decreased the corrosion rate of mild steel in a carbon tetrachloride-water vapor atmosphere by 99 percent. The next most effective inhibitor decreased the rate by about 95 percent.

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Influence of eco friendly plant material (Cucurbita maxima) on mild steel corrosion

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-09-2016-1709 ◽

2017 ◽

Vol 64 (5) ◽

pp. 492-498 ◽

Cited By ~ 3

Author(s):

K. Anbarasi ◽

V.G. Vasudha

Keyword(s):

Corrosion Rate ◽

Mild Steel ◽

Plant Material ◽

Inhibition Efficiency ◽

Steel Corrosion ◽

Open Circuit ◽

Cucurbita Maxima ◽

Content Type ◽

Kinetic And Thermodynamic Parameters ◽

Mild Steel Corrosion

Purpose This paper aims to examine the influence of leaves of Cucurbita maxima (LCM) extract on the corrosion of mild steel (MS) in 1N H2SO4 by gravimetric measurement and electrochemical study. The inhibition efficiency increased with increase in concentration of LCM. The corrosion rate increased with increase in temperature and decreased with increase in concentration of inhibitor compared to blank. The maximum inhibition efficiency of 96 per cent was obtained at 3 per cent v/v LCM at 343K for 1 h. The inhibitory action was explained on the basis of adsorption of secondary metabolites in the plant extract on the mild steel surface. The adsorption process obeys Langmuir, El-Awady, Temkin and Freundlich adsorption isotherms and was best fitted by Langmuir adsorption isotherm. Some kinetic and thermodynamic parameters are also discussed. Design/methodology/approach Weight loss measurements were conducted under total immersion of already weighed mild steel coupons in 100 ml of the test solution containing 0.05, 0.5, 1, 1.5, 2, 2.5 and 3 per cent of LCM extract and in blank solution at different temperature range (303, 313, 323, 333 and 343 K) for 1h. The electrochemical experiments were conducted at room temperature and at various concentrations of LCM extract. The electrochemical experiments were performed using a potentiostat. A three-electrode cell was used for the impedance measurements conducted at open circuit potential. Findings The inhibitor (LCM) shows good inhibition performance for the corrosion of mild steel in 1N H2SO4 solution. The inhibition efficiency increased and the corrosion rate decreased with increasing concentrations of inhibitor. Originality/value The studied plant material is a new one in mild steel corrosion. The influence of the plant material is clearly explained in the submitted paper.

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Naturally Occurring Exudates Gums as Ecofriendly Inhibitors for Mild Steel Corrosion in Acidic Medium

Journal of Chemistry Education Research and Practice ◽

10.33140/jcerp.05.02.09 ◽

2021 ◽

Vol 5 (2) ◽

Keyword(s):

Corrosion Rate ◽

Mild Steel ◽

Physical Adsorption ◽

Steel Corrosion ◽

Adsorption Parameters ◽

Kinetic And Thermodynamic Parameters ◽

Mild Steel Corrosion ◽

Increase With Increase ◽

Steel Increase ◽

Significant Difference

The corrosion inhibition potentials of gum exudates from Daniella oliveri (DO) and Commiphora Africana (CA) for the corrosion of mild steel in H2 SO4 have been studied using weight loss and thermometric methods at 303 and 333K. Results show that the exudates gum actually reduced the rates of corrosion of mild steel. Increase in the concentrations of the exudate’s gums increased their percentage inhibition efficiencies. Corrosion rate was found to increase with increase in temperature in the presence and absence of the gum exudates, though the corrosion rate was slower in the presence of the exudates gums. Both DO and CA exudates gums were found to obey Temkin and Langmuir adsorption models at all concentrations and temperatures studied. Physical adsorption mechanism was proposed from the adsorption parameters. Kinetic and thermodynamic parameters revealed that the adsorption process is spontaneous, exothermic and no significant difference was found between the inhibition efficiencies of DO and CA.

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Recent Developments in Mild Steel Corrosion Rate Predictive Models in Sweet Environments

ECS Meeting Abstracts ◽

10.1149/ma2017-02/9/693 ◽

2017 ◽

Keyword(s):

Corrosion Rate ◽

Mild Steel ◽

Predictive Models ◽

Steel Corrosion ◽

Mild Steel Corrosion ◽

Recent Developments

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Determination of Mild Steel Corrosion Rate under Turbulent Flow in Highly Acidic Solution

Journal of Applied Sciences ◽

10.3923/jas.2011.2464.2466 ◽

2011 ◽

Vol 11 (13) ◽

pp. 2464-2466 ◽

Cited By ~ 1

Author(s):

A.Y. Musa ◽

A.A.H. Kadhum ◽

A.B. Mohamad ◽

M.S. Takriff ◽

S.K. Kamarudin ◽

...

Keyword(s):

Corrosion Rate ◽

Turbulent Flow ◽

Mild Steel ◽

Acidic Solution ◽

Steel Corrosion ◽

Mild Steel Corrosion

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Trachyspermum Leaves Extract as a Green Inhibitor for Corrosion Inhibition of Mild Steel in 0.1m HCl: Experimental and Computational Study

10.21203/rs.3.rs-917730/v1 ◽

2021 ◽

Author(s):

Niloofar Jafari ◽

Sayed Ali Ahmadi ◽

Razieh Razavi

Keyword(s):

Corrosion Rate ◽

Mild Steel ◽

Computational Study ◽

Steel Corrosion ◽

Green Inhibitor ◽

Inhibitory Mechanisms ◽

Mild Steel Corrosion ◽

Galvanostatic Polarization ◽

Computational Data

Abstract The present study aims at investigating the impacts of the extract of Trachyspermum leaves on the mild steel corrosion in 0.1M hydrochloric acid (HCl), while highlighting its inhibitory mechanisms. The effects of mild steel corrosion in solutions of HCl were examined using the gravimetric and galvanostatic polarization techniques, along with EIS analyses. According to the results, the maximum inhibitory effectiveness corresponding to the minimum corrosion rate could be observed at the highest desirable level of inhibitor concentration equal to 100 ppm, while the corrosion rate decreases with an increase in the extract concentration. The absorption examinations indicated the best description of the metal surface interaction by Langmuir isotherm, while obtaining the best exposure time for the Trachyspermum leaves extract adsorption into the surface of the metal in different concentration. Based on the results of polarization, the inhibitors can play the role of a mixed inhibitor, also confirmed by the computational data.

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