Electrochemical Corrosion Testing on FLORYL Coating
The electrochemical polarization (anodic and cathodic) and impedance testing in 3.15% NaCl at ambient (20°C) temperature. The 2×2 inch aluminum -2024 panels were coated and compared with uncoated panels.
The presence of the coating has significantly reduced the current density throughout the test potential range of ±600 mV of open circuit. The data indicates that the coating is acting as a barrier to slow the diffusion of reactants to the metal surface.
In general, coatings are considered protective when their low frequency (≤0.1 Hz) impedance values are equal to or greater than 1 x E6 ohms.cm^2, higher values indicating better protection. The coated samples in electrochemical impedance analysis test exhibited impedance values as high as 1 xE9 ohms.cm^2. These tests indicate that the protective property of the coating is significant.