Study of chromate–zinc conversion process through microbalance/electroacoustic impedance coupling measurements
Abstract
Corrosion phenomena lead very often to drastic damages in metallic structures and the economic implications are obvious. In order to limit the corrosion reactions, zinc electroplating following by a chromate treatment is always used. To replace chromium, due to its toxicity and before to propose new reagents, a mechanistic study was performed through electroacoustic measurements. The viscoelastic properties of the obtained chromate layer were pointed out as the corrosion rate of the zinc layer.