Corrosion of Al and Al alloys in Cl- and Cu2- ion-containing solutions at 363 K*: Effects of inhibitor addition on the corrosion behavior

摘要

Effects of an inhibitor on the corrosion of Al and Al alloys in Cl - and Cu2- solutions at 363 K have been investigated by gravimetry and analyses of surfaces and vertical cross sections of specimens with a scanning electron microscope and an energy dispersive X-ray spectrometer. Addition of the inhibitor to the Cu2- solution inhibited effectively the corrosion of Al and Al alloys, while inhibitor addition to the Cl - solution didn't at all. The inhibitive effect in the Cu 2- solution can be explained in terms of the SiO2 film formation on the specimen, leading to the suppression of Cu deposition.