scholarly journals Mono Azo Dyes Compounds as Corrosion Inhibitors for Dissolution of Aluminium in Sodium Hydroxide Solutions

2007 ◽  
Vol 25 (3) ◽  
pp. 363-373 ◽  
Author(s):  
S S Al-Juaid
Keyword(s):  
Sodium Hydroxide ◽  
Azo Dyes ◽  
Corrosion Inhibitors

scholarly journals Kinetics of Substituted Bis- and Mono-azo Dyes as Corrosion Inhibitors for Aluminium in Hydrochloric Acid and Sodium Hydroxide Solutions

1999 ◽  
Vol 23 (7) ◽  
pp. 408-409
Author(s):  
Loutfy H. Madkour ◽  
R. M. Issa ◽  
I. M. El-Ghrabawy
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Azo Dyes ◽  
Thermodynamic Model ◽  
Corrosion Inhibitors ◽  
Kinetics Of ◽  
Alkaline Corrosion

This investigation is designed to apply an advanced kinetic–thermodynamic model on the data obtained from acidic and alkaline corrosion of aluminium using bis- and mono-azo dyes as corrosion inhibitors.

scholarly journals Propargyl as Corrosion Inhibitor for Al-5%Si/15%SiC Composite in 0.5molar Sodium Hydroxide

2016 ◽  
Vol 11 (2) ◽  
pp. 141 ◽  
Author(s):  
F. Asuke ◽  
S.A. Yaro ◽  
O.B. Oloche
Keyword(s):  
Sodium Hydroxide ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Sodium Hydroxide Solution ◽  
Inhibitor Concentration ◽  
Corrosion Characteristic ◽  
Adsorption Free Energy ◽  
Mechanism Of Inhibition ◽  
Maximum Inhibition

The corrosion characteristic of Al-5%Si/15%SiC composite in 0.5molar sodium hydroxide solution (cauustic soda) using propargyl as corrosion inhibitors was investigated employing gravimetric and potential measurements. The research was carried out at different inhibitor concentrations, time and temperature rangges of 0.5 – 2.5% v/v, 1– 5 hours and 30 – 70 °C respectively. Results obtained revealed that propargyl is a moderate corrosion inhibitor for the composite, with maximum inhibition efficiency of 59.23% at 30 °C and inhibitor concentration of 1.5% v/v. Thermodynamic parameters such as heat of adsorption, free energy and activation energy were obtained from experimental data and the mechanism of inhibition was elucidated. The inhibitor is physically and chemically absorbed unto the surface of the composite.

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