Natural products as corrosion inhibitor for metals in corrosive media — A review

Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in mild steel/2,5-bis(n-thienyl)-1,3,4-thiadiazoles/hydrochloric acid system

A critical overview of the latest developments in the aluminum battery technologies is reported. The substitution of lithium with alternative metal anodes characterized by lower cost and higher abundance is nowadays one of the most widely explored paths to reduce the cost of electrochemical storage systems and enable long-term sustainability. Aluminum based secondary batteries could be a viable alternative to the present Li-ion technology because of their high volumetric capacity (8040 mAh cm(-3) for Al vs 2046 mAh cm(-3) for Li). Additionally, the low cost aluminum makes these batteries appealing for large-scale electrical energy storage. Here, we describe the evolution of the various aluminum systems, starting from those based on aqueous electrolytes to, in more details, those based on non-aqueous electrolytes. Particular attention has been dedicated to the latest development of electrolytic media characterized by low reactivity towards other cell components. The attention is then focused on electrode materials enabling the reversible aluminum intercalation-deintercalation process. Finally, we touch on the topic of high-capacity aluminum-sulfur batteries, attempting to forecast their chances to reach the status of practical energy storage systems.

An Overview and Future Perspectives of Aluminum Batteries

Two triazole derivatives, 3,4-dichloro-acetophenone-O-1'-(1',3',4'-triazolyl)-methaneoxime (4-DTM) and 2,5-dichloro-acetophenone-O-1'-(1',3',4'-triazolyl)-methaneoxime (5-DTM) were synthesized, and the inhibition effects for mild steel in 1 M HCl solutions were investigated by weight loss measurements, electrochemical tests and scanning electronic microscopy (SEM). The weight loss measurements showed that these compounds have excellent inhibiting effect at a concentration of 1.0 x 10(-3) M. The potentiodynamic polarization experiment revealed that the triazole derivatives are inhibitors of mixed-type and electrochemical impedance spectroscopy (EIS) confirmed that changes in the impedance parameters (R-ct and C-dl) are due to surface adsorption. The inhibition efficiencies obtained from weight loss measurements and electrochemical tests were in good agreement. Adsorption followed the Langmuir isotherm with negative values of the free energy of adsorption Delta G(ads)(o). The thermodynamic parameters of adsorption were determined and are discussed. Results show that both 4-DTM and 5-DTM are good inhibitors for mild steel in acid media.

Some new triazole derivatives as inhibitors for mild steel corrosion in acidic medium

Inhibitory action of Phyllanthus amarus extracts on the corrosion of mild steel in acidic media

The corrosion inhibition of nickel in acid solutions by 2-(triphenyl phosphoranylidene) succinic anhydride (2TPSA) has been investigated using DC and AC techniques. The percentage inhibiti...

Acid Corrosion Inhibition of Nickel by 2-(Triphenosphoranylidene) Succinic Anhydride

Inhibition of aluminium corrosion in alkaline solutions using natural compound

The corrosion of mild steel in sulfuric acid containing 4 × 10−4 M of either D-galactose thiosemicarbazone, 1-phenyl thiosemicarbazide, or 4-phenyl thiosemicarbazide, has been studied over...

E. Khamis

Papers

Acid Corrosion Inhibition of Nickel by 2-(Triphenosphoranylidene) Succinic Anhydride

Inhibition of aluminium corrosion in alkaline solutions using natural compound

The Effect of Temperature on the Acidic Dissolution of Steel in the Presence of Inhibitors

A natural extract as scale and corrosion inhibitor for steel surface in brine solution

Novel package for inhibition of aluminium corrosion in alkaline solutions