Synergistic inhibition between o-phenanthroline and chloride ion on cold rolled steel corrosion in phosphoric acid

Mu, Guannan; Li, Xueming; Li, Fēi

doi:10.1016/j.matchemphys.2004.01.041

Cited by 304 publications

(55 citation statements)

References 34 publications

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“…This high activation energy value supports the low value of i corr deduced from the polarisation measurements and indicates the higher protective efficiency of 1,4-BT. In the same way, the pre-exponential factor A like E a increases in the presence of 1,4-BT as reported by [47].…”

Section: Effect Of Temperaturesupporting

confidence: 81%

New Mechanism Synthesis of 1,4-Benzothiazine and its Inhibition Performance on Mild Steel in Hydrochloric Acid

Aloui¹,

Forsal²,

Sfaira³

et al. 2009

Port. Electrochim. Acta

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Abstract1-(3-methyl-4H-1,4-benzothiazin-2-yl)ethanone (1,4-BT) was synthesised via a new mechanism. 1,4-BT was thereafter tested as corrosion inhibitor of mild steel in hydrochloric solution at 293 K by weight loss measurements and electrochemical techniques (potentiodynamic polarisation, polarisation resistance, impedance spectroscopy (EIS)). Inhibiting efficiency (E%) increased with concentration and reached highest values up to 98% even at low concentration with changing the mechanism of the corrosion process. Results obtained showed that the inhibitor studied was an efficient inhibitor, especially in cathodic domain. The temperature effect on the corrosion behaviour of mild steel in 1 M HCl with and without 1,4-BT at 5 10 -3 M was studied in the temperature range from 293 to 333 K. E% remains the same even at high temperature. The adsorption free energy and activation parameters for the mild steel dissolution reaction, in the presence of 1,4-BT, were determined. 1,4-BT is adsorbed on the mild steel surface according to a Langmuir isotherm adsorption model.

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Section: Effect Of Temperaturesupporting

confidence: 81%

New Mechanism Synthesis of 1,4-Benzothiazine and its Inhibition Performance on Mild Steel in Hydrochloric Acid

Aloui¹,

Forsal²,

Sfaira³

et al. 2009

Port. Electrochim. Acta

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show abstract

“…The decrease in corrosion rate is mostly decided by the activation energy. As clearly seen in Table 5, both E a and A increased in the presence of inhibitor [38]. The positive sign of the enthalpy ðDH o a Þ reflects the endothermic nature of the steel dissolution process.…”

Section: Effect Of Temperaturementioning

confidence: 82%

The effect of poly(vinyl caprolactone-co-vinyl pyridine) and poly(vinyl imidazol-co-vinyl pyridine) on the corrosion of steel in H3PO4 media

et al. 2007

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The inhibiting effect of two organic copolymers namely poly(vinyl caprolactone-co-vinyl pyridine) (PVCVP) and poly(vinyl imidazol-co-vinyl pyridine) (PVIVP) on the corrosion of steel in phosphoric acid was investigated at various temperatures. The study was carried out by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. Inhibition efficiency (E %) increased with polymer concentration to attain 85% at 10 -4 M for PVIVP. Adsorption of polymers on the steel surface in 2 M H 3 PO 4 followed the Langmuir isotherm model. EIS measurements show that the dissolution of steel occurs under activation control. Polarisation curves indicate that the tested polymers functioned as cathodic inhibitors. E % values obtained from various methods used are in good agreement with each other. The temperature effect on the corrosion behaviour of steel in 2 M H 3 PO 4 in the presence and absence of the inhibitor was studied in the temperature range 298-338 K. The adsorption free energy (DG o ads ) and the activation parameters (E a , DH o a , DS o a ) for the steel dissolution reaction in the presence of polymer were determined.

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“…Synergistic effect using iodide ion excelled compared to that of chloride and bromide ions. This is attributed to the fact that iodide ions has ionic radius, polarizability and hydrophobicity higher than bromide and chloride ions [37,38].…”

Section: Resultsmentioning

confidence: 99%

Synergistic Influence of Halide Ions on Corrosion Inhibition Performance of Gum Exudates of Azadirachta indica on Carbon Steel in Sulphuric Acid Medium

Manickam¹,

Dheenadhayalan²,

Jaganathan³

2018

Asian J. Chem.

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Synergistic inhibition between o-phenanthroline and chloride ion on cold rolled steel corrosion in phosphoric acid

Cited by 304 publications

References 34 publications

New Mechanism Synthesis of 1,4-Benzothiazine and its Inhibition Performance on Mild Steel in Hydrochloric Acid

New Mechanism Synthesis of 1,4-Benzothiazine and its Inhibition Performance on Mild Steel in Hydrochloric Acid

The effect of poly(vinyl caprolactone-co-vinyl pyridine) and poly(vinyl imidazol-co-vinyl pyridine) on the corrosion of steel in H3PO4 media

Synergistic Influence of Halide Ions on Corrosion Inhibition Performance of Gum Exudates of Azadirachta indica on Carbon Steel in Sulphuric Acid Medium

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