The corrosion of iron in hydrochloric acid: Inhibition by amines

Willars, M.J.; Hampson, N.A.; Atkinson, A.; Marshall, A.

doi:10.1016/0376-4583(76)90059-5

Cited by 16 publications

(3 citation statements)

References 9 publications

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“…Chemical additives in different acid‐aqueous systems can prevent and/or modify the corrosion process (Roberge, 1999). Because of their good water solubility and low molecular weights, amines are well known as corrosion inhibitors (Willars et al , 1976; Damborenea et al , 1997; Khaled et al , 2004). It has been found that corrosion efficiency increased with increasing the carbon number in open‐chain amines (Aramaki and Hackerman, 1968, 1969).…”

Section: Introductionmentioning

confidence: 99%

N‐heterocyclic amines and derivatives as corrosion inhibitors for iron in perchloric acid

Babić‐Samardžija

Khaled

Hackerman

2005

Anti-Corrosion Methods and Materials

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Purpose-Work reported in the present paper investigated the inhibiting properties of a number of N-heterocyclic amines in 0.1 mol/l HClO 4. An attempt also was made to correlate some molecular parameters of these compounds with their corrosion inhibitor efficiency. Design/methodology/approach-The test series included piperidine (pip), 2-methylpiperidine (2mp), 3-methylpiperidine (3mp), cis-2,6dimethylpiperidine (26dp), 3,5-dimethylpiperidine (35dp), 3-hydroxy piperidine (3hp), 4-hydroxypiperidine (4hp), 4-aminopiperidine (4ap), piperazine (pz), 2-methylpiperazine (2mpz) and cis-2,6-dimethylpiperazine (26dpz). The inhibiting effect was investigated in 0.1 mol/L HClO 4 by potentiodynamic polarization (DC) and electrochemical impedance spectroscopy (EIS). Findings-The results show that these compounds suppressed both cathodic and anodic processes of iron corrosion in 0.1 mol/l HClO 4 by adsorption on the surface, which followed a Langmuir adsorption isotherm. Experimental observations indicated that basic piperidine and piperazine were better corrosion inhibitors than were their derivatives. The inhibition properties of N-heterocyclic amines were found to be related to the charge on the nitrogen atom and the sum of the net charge of the all six atoms from the cyclic ring. Originality/value-This paper provides useful information relative to corrosion inhibition efficiency of the group of N-heterocyclic amines. It is concerned with a theoretical explanation between electronic and structural characteristics of these compounds and their inhibitor efficiency.

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Section: Introductionmentioning

confidence: 99%

N‐heterocyclic amines and derivatives as corrosion inhibitors for iron in perchloric acid

Babić‐Samardžija

Khaled

Hackerman

2005

Anti-Corrosion Methods and Materials

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“…Acids such as nitric, phosphoric, sulfamic, oxalic, tartaric, citric, acetic and formic are used for special applications. The inhibition of corrosion of iron and steel in acidic media by different types of organic compounds has been studied extensively (Scott and Lockhart, 1974; Bried and Winn, 1951; Costain and Terry, 1972; Katoaka and Takada, 1973, 1975; Drimus and Ludoson, 1969; Willars et al , 1976; Podobaev et al , 1969; Nanova et al , 1975; Podobaev and Vasilev, 1972; Dzhurakulov et al , 1972; Schmitt and Olbertz, 1979; Schmitt and Olbertz, 1981; Monduli et al , 1982; Isklakov and Kurbanov, 1983; Gaeva et al , 1983; Armaki, 1972; Cheinig Fil, 1987; Zashchita Met , 1987; Moussa et al , 1991). The available results show that most inhibitors act by adsorption onto the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Cinnamoylmalononitriles as corrosion inhibitors for mild steel in hydrochloric acid solution

Fouda

Elewady

Elenien

et al. 2008

Anti-Corrosion Methods and Materials

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PurposeThe purpose of this paper is to show the effect of cinnamoylmalononitrile (CMN) compounds on the corrosion inhibition of carbon steel in HCl and the effect of some substituent groups on the corrosion inhibition.Design/methodology/approachSeveral papers have been published (1900‐1999), which aimed to investigate and explain the effect of organic compounds on the corrosion inhibition process. Two methods were used to determine the corrosion rate, weight loss and galvanostatic polarization. Additionally, the effects of temperature and concentration of the inhibitors were studied. The thermodynamic parameters for the process were computed and discussed.FindingsThe paper finds that surface analytical techniques such as X‐ray photoelectron spectroscopy and Auger spectroscopy can shed more light, on the mechanism of corrosion inhibition.Research limitations/implicationsThe use of donating and withdrawing groups will improve understanding of the mechanisms of corrosion and inhibition. However, the paper does not use the technique of impedance measurement for comparison purposes.Practical implicationsOther steel alloys and compounds with large or small molecular weights can be used for comparison.Originality/valueThe use of CMN compounds as corrosion inhibitors for carbon steel in HCl provides more information on carbon steel corrosion for academic and starting researchers.

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“…To date, no a.c. impedance measurements characteristic of magnetite have been recorded in the literature although we have reported [ 3] measure ments on an iron electrode covered with oxide. These measurements were complicated because the composition of the electrode surface changed with potential.…”

Section: Introductionmentioning

confidence: 99%