Fig. 7From: Protecting silver cultural heritage objects with atomic layer deposited corrosion barriersPorosity of ALD films: electrochemical impedance spectroscopy of 5, 10, 20, 70 and 100 nm Al2O3 ALD coated silver substrates with the a electrochemical spectra (Bode plot) and b calculated porosity (Eq. 1)Back to article page