engleski

The effect of electrolyte flow rate and temperature on corrosion and protection of Al- 2.5Mg alloy by (+)-catechin

The effects of flow rate and temperature on the corrosion behaviour of the Al-2.5Mg alloy in a 3% NaCl solution and the inhibiting efficiency of (+)-catechin on the corrosion of the same alloy have been examined. Measurements were carried out in a flow-through cell, at different flow rates (v1 = 0.0029 m s-1, v2 = 0.0059 m s-1 and v3 = 0.0118 m s-1) and temperatures (20 °C, 30 °C, 40 °C). Electrochemical parameters for the Al-2.5Mg alloy were determined by polarisation techniques and electrochemical impedance spectroscopy (EIS). Increased flow rate and temperature cause a stronger corrosion attack on the alloy investigated. The addition of (+)-catechin inhibited corrosion at all temperatures and flow rates. The inhibitor efficiency decreased with the increase in flow rate and temperature.

Al-2.5Mg alloy ; flow conditions ; inhibition of corrosion ; (+)-catehin

Glavni autor rada: Ladislav Vrsalović