Corrosion behaviour of new oxo-pyrimidine derivatives on mild steel in acidic media: Experimental, surface characterization, theoretical, and Monte Carlo studies

Abstract Mild steel (a low carbon steel) is an affordable engineering material used for many purposes in various environments including mild acidic environment with some precautions. The corrosion behaviour of mild steel (MS) in 0.5 M H2SO4 and 0.5 M HCl, in the temperature range (303–323 K) without and with the inhibitor N-[(3,4-dimethoxyphenyl) methyleneamino]-4-hydroxy-benzamide (DMHB), was investigated using Potentiodynamic polarization and Electrochemical impedance spectroscopy (EIS) techniques supplementing with surface characterization study using scanning electron microscope (SEM) and atomic force spectroscopy (AFM). Experimental observations were found to be in agreement with Density functional theory (DFT) calculations. The inhibition efficiency increases with increase in DMHB concentration and showed maximum inhibition efficiency of 86% in 0.5 M H2SO4 and 81% in 0.5 M HCl, respectively, at concentration of 3 × 10─3 M at 303 K. The inhibition efficiency of DMHB obtained relatively at its lower concentration (3 × 10─3 M) compared to other reported related compounds confirms its potential towards corrosion inhibition. The variation in the kinetic and thermodynamic parameters indicated physisorption of DMHB on MS and its mixed type inhibitive action followed Langmuir’s isotherm model. DFT calculations go along with the experimental results, signifying the potential corrosion inhibition behaviour of DMHB for MS in both the acid media.

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Surface characterization, mechanical properties and corrosion behaviour of ternary based Zn–ZnO–SiO2composite coating of mild steel

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.09.090 ◽

2016 ◽

Vol 654 ◽

pp. 561-566 ◽

Cited By ~ 25

Author(s):

A.P.I. Popoola ◽

V.S. Aigbodion ◽

O.S.I. Fayomi

Keyword(s):

Mechanical Properties ◽

Mild Steel ◽

Surface Characterization ◽

Corrosion Behaviour ◽

Mechanical Properties And Corrosion

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Study of Corrosion Inhibition Potentials of Eichhornia crassipes Leaves Extract on Mild Steel in Acidic Medium using Artificial Neural Network

NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES ◽

10.46912/napas.22 ◽

2015 ◽

Vol 6 ◽

pp. 158-167

Author(s):

A Ashwe ◽

K K Ikpambese

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Mild Steel ◽

Corrosion Inhibition ◽

Corrosion Behavior ◽

Acidic Medium ◽

Eichhornia Crassipes ◽

Corrosion Behaviour ◽

Ann Model ◽

Acidic Media

Prediction of corrosion behavior of steel in acidic environments is an essential step towards optimizing the design of equipment in any industrial setting. An artificial neural network (ANN) may be used as a reliable modeling method for simulating and predicting the corrosion behaviour. The present study has been conducted to investigate the corrosion inhibition potentials of Eichhornia crassipes (water hyacinth) leaves extract for mild steel in acidic media and to establish an appropriate ANN model for predicting corrosion behavior of mild steel in H 2 SO 4 inhibited by Eichhornia crassipes. The experimental procedure employed weight loss method for corrosion rate measurements. Results have shown that Eichhornia crassipes is an effective inhibitor for corrosion inhibition of mild steel in acidic medium. A Levenberg-Marquardt (LM) ANN with single hidden layer having five neurons was employed to simulate the corrosion behaviour. The neural network was trained using the experimental corrosion database. Finally, validity of the proposed model was tested using standard statistical parameters. Results indicate that the trained ANN model is robust for predicting corrosion behaviour of mild steel in acidic media.

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Studies on the effect of Cold Plastic Deformation and Heat Treatment on the Microstructural Arrangement and Corrosion Behaviour of Mild Steel in Acidic Media

Nigerian Journal of Environmental Sciences and Technology - March 2018 ◽

10.36263/nijest.2019.02.0132 ◽

2019 ◽

Vol 3 (2) ◽

pp. 331-341

Author(s):

C. S. Obayi ◽

J. C. Nwobodo ◽

S. I. Neife ◽

C. C. Daniel-Mkpume

Keyword(s):

Heat Treatment ◽

Plastic Deformation ◽

Mild Steel ◽

Corrosion Behaviour ◽

Cold Plastic Deformation ◽

Acidic Media ◽

Corrosion Rates ◽

Heat Treated ◽

Deformation And Heat Treatment ◽

Cold Pressed

Mild steel is the most extensively used carbon steel for numerous industrial applications, where it is exposed to various service environments containing acids, bases and salt solutions. From industrial point of view, plastic deformation and heat treatment are among the essential manufacturing steps in mild steel processing and these steps can implicate its corrosion behaviour. This work investigated the effect of cold plastic deformation and subsequent high temperature heat treatment on the microstructure and corrosion behaviour of mild steel in two different concentrations (0.5M and 1.0M) of sulphuric acid (H2SO4), using the weight loss method. Mild steel samples were cold pressed to thickness reduction of 20%, 40% and 50% and subsequently heat treated at 700oC and 900°C and then air-cooled. The test duration lasted for 25 days and the weight loss measurements were taken at intervals of 5 days. It was observed that corrosion rates of the samples were generally higher in the 1.0M than in 0.5M acid solution. The as-received and heat-treated mild steel samples exhibited higher corrosion rates than the cold-pressed and heat-treated samples. The results indicated strongly that cold working accompanied by heat treatment improves corrosion resistance of mild steel in acidic media.

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