Probing the atmospheric corrosion of metals. Zinc

Scanning vibrating capacitor (Kelvin probe) and electrochemical impedance spectroscopy are used in electrochemical monitoring of the atmospheric corrosion of zinc. The effect of the corrosion product layer on the surface potential and capacitance is studied. Upon the local application of NaCl, the spatial separation of the cathodic and anodic reactions was noticed in the profiles of the electrode potential and chemical composition of the corrosion products (infrared microscopy). The effect of corrosion inhibitors and activators on the electrochemical atmospheric corrosion of zinc is studied.