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

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.

Investigation of Mild Steel Corrosion Rate In San Diego Harbor

CORROSION ◽  
1961 ◽  
Vol 17 (4) ◽  
pp. 188t-190t ◽  
Author(s):  
M. H. PETERSON ◽  
L J. WALDRON
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
San Diego ◽  
Steel Corrosion ◽  
Mild Steel Corrosion ◽  
Steel Panels ◽  
One Year ◽  
The One ◽  
Pit Depth ◽  
Different Levels

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

scholarly journals Staminate Flower of Cocos Nucifera as Green Inhibitor for Mild Steel in HCl Medium

2012 ◽  
Vol 9 (3) ◽  
pp. 1632-1644 ◽  
Author(s):  
R. Rajalakshmi ◽  
A. S. Safina
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Cocos Nucifera ◽  
Staminate Flower ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Flower Extract ◽  
Mild Steel Corrosion ◽  
Hcl Medium ◽  
Mixed Type Inhibitor

Corrosion control methods, especially the use of inhibitors, have gained monumental importance in the present scenario of expunging corrosion and the quest for eco-friendly reasons continues. To arrive at an inexpensive non-toxic, eco-friendly inhibitor formulations the present study on the use of Staminate Flower extract of Cocos Nucifera has been carried out by the classical weight loss measurements and electrochemical polarization measurements. The acid extract could bring out a maximum of 97.3% inhibition of mild steel corrosion in 1M HCl. Thermodynamic parameters of the corrosion process were calculated from temperature study. The adsorptive behaviour of Staminate Flower extract in acid solution may be approximated both by Langmuir and Temkin type isotherms. The results obtained by Tafel, Linear polarization resistance, and impedance spectroscopy have been correlated with the classical weight loss measurements. Values of Tafel constant ba and bc confirmed that the Staminate Flower extract acts like mixed type inhibitor. Examination of the surface of the metal in the presence of the inhibitor confirmed the deposition of inhibitor on the metal surface. The Staminate Flower extract in HCl medium efficiently inhibits the corrosion and proved to be zero cost inhibitor, eco-friendly, non-toxic, and highly economical.

Corrosion Inhibitors for Carbon Tetrachloride—Water Vapor Atmospheres

CORROSION ◽  
1959 ◽  
Vol 15 (9) ◽  
pp. 15-17 ◽  
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.

Task-specific ionic liquid as a new green inhibitor of mild steel corrosion

2014 ◽  
Vol 289 ◽  
pp. 478-486 ◽  
Author(s):  
E. Kowsari ◽  
M. Payami ◽  
R. Amini ◽  
B. Ramezanzadeh ◽  
M. Javanbakht
Keyword(s):  
Ionic Liquid ◽  
Mild Steel ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Mild Steel Corrosion ◽  
Task Specific Ionic Liquid

Studying effect of plantain extract behavior as an eco-friendly corrosion inhibitor on the mild steel in 1 M HCl solution

2018 ◽  
Vol 65 (3) ◽  
pp. 310-316 ◽  
Author(s):  
Moosa Es’haghi ◽  
Amirhossein Amjad ◽  
Sorayya Asghari ◽  
Ali Lotfi
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Sample Surface ◽  
Green Inhibitor ◽  
Content Type ◽  
Inhibition Effect ◽  
Mild Steel Corrosion ◽  
Hcl Solution

Purpose Corrosion inhibitors most commonly are used in the acid pickling, cleaning and etching solutions. Plant extracts as rich and cheap resources are among the eco-friendly inhibitors. This study aims to investigate the inhibition effect of plantain extract on mild steel corrosion. Design/methodology/approach The inhibition influence of plantain extract on mild steel corrosion was investigated through Tafel polarization, electrochemical impedance spectroscopy and weight loss techniques in 1 M HCl solution. Furthermore, the sample surface morphology was verified by scanning electron microscopy. Findings The inhibition effect of the plantain extract was increased with the increase in the inhibitor concentration due to its adsorption on the surface of samples. The adsorption mechanism of the plantain extract on mild steel is physical adsorption and follows Langmuir isotherm. Originality/value The results obtained from different methods showed that the plantain extract has good inhibition performance on corrosion mild steel in 1 M HCl solution as a green inhibitor.

scholarly journals Neutrophilic Iron-Oxidizing “Zetaproteobacteria” and Mild Steel Corrosion in Nearshore Marine Environments

2010 ◽  
Vol 77 (4) ◽  
pp. 1405-1412 ◽  
Author(s):  
Joyce M. McBeth ◽  
Brenda J. Little ◽  
Richard I. Ray ◽  
Katherine M. Farrar ◽  
David Emerson
Keyword(s):  
Mild Steel ◽  
Steel Corrosion ◽  
Small Subunit ◽  
Microbiologically Influenced Corrosion ◽  
Rrna Gene ◽  
Uniform Corrosion ◽  
Mild Steel Corrosion ◽  
Laboratory Microcosm

ABSTRACTMicrobiologically influenced corrosion (MIC) of mild steel in seawater is an expensive and enduring problem. Little attention has been paid to the role of neutrophilic, lithotrophic, iron-oxidizing bacteria (FeOB) in MIC. The goal of this study was to determine if marine FeOB related toMariprofundusare involved in this process. To examine this, field incubations and laboratory microcosm experiments were conducted. Mild steel samples incubated in nearshore environments were colonized by marine FeOB, as evidenced by the presence of helical iron-encrusted stalks diagnostic of the FeOBMariprofundus ferrooxydans, a member of the candidate class “Zetaproteobacteria.” Furthermore,Mariprofundus-like cells were enriched from MIC biofilms. The presence ofZetaproteobacteriawas confirmed using aZetaproteobacteria-specific small-subunit (SSU) rRNA gene primer set to amplify sequences related toM. ferrooxydansfrom both enrichments andin situsamples of MIC biofilms. Temporalin situincubation studies showed a qualitative increase in stalk distribution on mild steel, suggesting progressive colonization by stalk-forming FeOB. We also isolated a novel FeOB, designatedMariprofundussp. strain GSB2, from an iron oxide mat in a salt marsh. Strain GSB2 enhanced uniform corrosion from mild steel in laboratory microcosm experiments conducted over 4 days. Iron concentrations (including precipitates) in the medium were used as a measure of corrosion. The corrosion in biotic samples (7.4 ± 0.1 mM) was significantly higher than that in abiotic controls (5.0 ± 0.1 mM). These results have important implications for the role of FeOB in corrosion of steel in nearshore and estuarine environments. In addition, this work shows that the global distribution ofZetaproteobacteriais far greater than previously thought.

Sign in / Sign up

Export Citation Format

Share Document