N′, N′-dialkylhydrazides as inhibitors of acid corrosion of steel

Shcherban, M. G.; Батуева, Т. Д.; Radushev, A. V.

doi:10.1134/s1070427209010121

Russ J Appl Chem

2009

DOI: 10.1134/s1070427209010121

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N′, N′-dialkylhydrazides as inhibitors of acid corrosion of steel

M. G. Shcherban

Т. Д. Батуева

A. V. Radushev

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Cited by 5 publications

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“…The adsorption reaches its limiting value at rather high concentrations, when micelles present in solution cease to exhibit a tendency toward further growth. In this case, the adsorption process is described by the equation (5) in which the K 1 /K 2 ratio refl ects the amount of adsorption in the gradually sloping part of the curve.…”

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confidence: 99%

“…The working electrolytes were prepared from distilled water. The protective effect of compounds was evaluated by the gravimetric method [5].The corrosion rate of steel, ρ, was calculated by the formula (1) where Δm is the loss of mass by a sample during tests (g); S, surface area of the sample (m 2 ); and τ, test duration (h).The protective effect Z (%) and the inhibiting effect γ were determined by the formulas …”

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confidence: 99%

“…Polarization curves were measured on a PI-50 potentiostat in a standard YaSE-2 electrochemical cell [5] with a silver chloride reference electrode and platinum auxiliary electrode.…”

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“…The working electrolytes were prepared from distilled water. The protective effect of compounds was evaluated by the gravimetric method [5].…”

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Colloidal-chemical and inhibiting properties of N-(2-hydroxyethyl)alkylamines

et al. 2012

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Effect of the pH of the medium on colloidal-chemical characteristics of reagents from the N-(2-hydroxyethyl)alkylamine series and the effect of these reagents on the corrosion behavior of 0.5 KP steel in 1 M HCl were studied. The corrosion inhibition mechanism was found.N-(2-Hydroxyethyl)alkylamines (HEAs) are known as intermediate compounds in synthesis of poly(oxyethylene)alkylamines RN(CH 2 CH 2 OH) m (CH 2 CH 2 -OH), which are strong surfactants [1]. Lower homologs of the HEA series have been suggested as fl occulants for purifi cation of neutral and weakly acidic wastewater to remove Cu(II) ions [2]. However, evidence about properties and applications of these reagents is scanty and nonsystematic.Here, we proceed with our study [3] of physicochemical properties of N-(2-hydroxyethyl) alkylamines of general formula RNHCH 2 CH 2 OH, where R = C 8 H 17 -C 16 H 33 and examine the infl uence exerted by the pH of the medium on the surface-active and functional characteristics of compounds belonging to the given homologous series.EXPERIMENTAL N-(2-Hydroxyethyl)alkylamines were produced by the method described in [3]. The content of the main substance in the samples obtained was no less than 96% The surface tension at the interfaces between an aqueous solution of HEAs and air and a solution of HEAs in 0.1 M HCl and air was measured by the stalagmometric method [4].Corrosion tests were performed on samples fabricated from 0.5 KP steel. Gravimetric tests were made with planar 30 × 20 × 2 mm samples, and electrochemical studies, on planar electrodes with a working surface area of 1 cm 2 . The samples were prepared for the study by cleaning with fi ne emery paper, degreasing with ethanol, and rinsing with distilled water. The gravimetric tests were made on the whole surface of the samples, whereas in electrochemical studies, all nonworking surfaces were insulated with a paraffi n-rosin mixture. The study was performed in 0.1 M HCl (chemically pure grade). The working electrolytes were prepared from distilled water. The protective effect of compounds was evaluated by the gravimetric method [5].The corrosion rate of steel, ρ, was calculated by the formula (1) where Δm is the loss of mass by a sample during tests (g); S, surface area of the sample (m 2 ); and τ, test duration (h).The protective effect Z (%) and the inhibiting effect γ were determined by the formulas

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Colloidal-chemical and inhibiting properties of N-(2-hydroxyethyl)alkylamines

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“…M H 2 SO 4 respectively at 11.086 × 10 -4 M concentration and at 60 °C. The inhibition effect of N', N'-Dialkylhydrazides [C 4 H 9 CH (C 2 H 5 ) C(O)NHN(R) 2 , R= C 2 H 5 (HD 15 ), C 3 H 7 (HD 16 ) , C 4 H 9 (HD 17 ), C 5 H 11(HD 18 )] in 0.1 and 1 M HCl as corrosion inhibitor of ST 20 steel has been studied by Shcherban et al16 using electrochemical and gravimetric methods. The tested hydrazide compounds have acted as a mixed inhibitor.…”

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Hydrazide Derivatives: An Overview of Their Inhibition Activity against Acid Corrosion of Mild Steel

Shetty¹

2018

S.Afr.j.chem.

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This paper gives an overview of the application of hydrazide derivatives in acid media as corrosion inhibitors of mild steel. In chemical and petrochemical industries, mild steel is the major constructional material widely used. Acid solutions have been commonly used in these industries as pickling agents to remove rust or any scale from the mild steel surface. The excessive dissolution of mild steel in such aggressive medium can be best controlled by addition of suitable organic inhibitors. Hydrazide derivatives are widely used in such applications as mild steel corrosion inhibitors. The various factors which influence the corrosion inhibition efficiency of different hydrazide derivatives have been discussed. The information provided is useful for various industries where corrosion inhibitors are needed to protect mild steel structures which are being exposed to hydrochloric or sulphuric acid solutions.

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Electrochemical evaluation and DFT calculations of aromatic sulfonohydrazides as corrosion inhibitors for XC38 carbon steel in acidic media

Ichchou

Larabi

Rouabhi

et al. 2019

Journal of Molecular Structure

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N′, N′-dialkylhydrazides as inhibitors of acid corrosion of steel

Cited by 5 publications

References 0 publications

Colloidal-chemical and inhibiting properties of N-(2-hydroxyethyl)alkylamines

Colloidal-chemical and inhibiting properties of N-(2-hydroxyethyl)alkylamines

Hydrazide Derivatives: An Overview of Their Inhibition Activity against Acid Corrosion of Mild Steel

Electrochemical evaluation and DFT calculations of aromatic sulfonohydrazides as corrosion inhibitors for XC38 carbon steel in acidic media

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