Reaction Rate Studies for the Corrosion of Metals in Acids—I, Iron in Mineral Acids

Mathur, P.B.; Vasudevan, T.

doi:10.5006/1.3579270

Cited by 164 publications

(70 citation statements)

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“…The steel coupons were left hanged in the test solution (1 M HCl) for 150 minutes at 25  1C before recording the loss of their weight. Weight loss measurements were carried out as described elsewhere [17]. The percentage inhibition efficiency (IE) of the Schiff base compounds was calculated from weight loss measurements using the following equation:…”

Section: Experimental Methodsmentioning

confidence: 99%

Corrosion inhibition of 1018 carbon steel in hydrochloric acid using Schiff base compounds

Zaafarany¹

2014

Int. J. Corros. Scale Inhib.

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The inhibition effect of some Schiff base compounds toward the corrosion of 1018 carbon steel in hydrochloric acid solution was studied using weight loss, galvanostatic polarization, and electrochemical impedance spectroscopy measurements. The percentage inhibition efficiency increased with increasing inhibitor concentration and with decreasing temperature. The polarization measurements indicated that the inhibitors are of mixed type and inhibit corrosion by adsorption on the steel surface. The adsorption process is described by the Freundlich adsorption isotherm. The activation energy and some activation thermodynamic parameters were calculated and explained. From the impedance data it is found that the corrosion of carbon steel is controlled by the charge transfer process at all concentrations of inhibitors.

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Section: Experimental Methodsmentioning

confidence: 99%

Corrosion inhibition of 1018 carbon steel in hydrochloric acid using Schiff base compounds

Zaafarany¹

2014

Int. J. Corros. Scale Inhib.

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“…Carbon steel sheets with double side's surface area of 3 cm The weight loss measurements were carried out as described elsewhere [9]. The specimens were immersed in 50 mL of test solution during 24 hours.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…(Fig. 8) is obtained according to the equation: E pitt = a 2 + b 2 log C inh (9) where a 2 and b 2 are constants which depend on both the type of additive and the nature of the electrode.…”

Section: Susceptibility Of C-steel To Pitting Corrosion By Chloride Ionsmentioning

confidence: 99%

Guar Gum as Corrosion Inhibitor for Carbon Steel in Sulfuric Acid Solutions

Abdallah

2004

Port. Electrochim. Acta

218

106

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Guar gum was tested as corrosion inhibitor for carbon steel in 1 M H 2 SO 4 solution using weight loss and Tafel polarization techniques. The results showed that the inhibition efficiency increases with the increasing of the guar gum concentration, which act as an inhibitor of the mixed type. The inhibition action of guar gum was discussed in terms of its horizontal adsorption on the metal surface. The adsorption follows Langmuir adsorption isotherm. The effect of the presence of chloride ion in pitting corrosion was analyzed by the potentiodynamic anodic polarization technique. The pitting corrosion potential changes with the concentration of Cl -ion according to a sigmoid S-shaped curve. This behaviour was explained on the basis of the formation of passivatable, active and continuously propagated pits.

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“…In our previous work [14], we investigated the efficiency of SA as a corrosion inhibitor for LCS in 1.0 M HCl solutions in the pH range (2)(3)(4)(5)(6)(7)(8), and we discussed the mechanism of adsorption. We have recently investigated the temperature dependence of the corrosion rate and obtained activation energy for the corrosion process of LCS in 1.0 M HCl solutions (pH 4) in the absence and presence of various concentrations of SA.…”

Section: Introductionmentioning

confidence: 99%

“…Temperatures effects on acidic corrosion, most often in hydrochloric and sulphuric acids, have been the object of a large number of investigations [1][2][3][4][5][6][7][8][9][10]. It is generally assumed that in acid corrosion the inhibitors adsorb on the metal surface, resulting in a structural change of the double layer and reduced rate of the electrochemical partial reaction.…”

Section: Introductionmentioning

confidence: 99%