The corrosion behavior of 2A02 Al alloy under 4 mg/cm² NaCl deposition at different temperatures (from 30 to 80 °C) has been studied. This corrosion behavior was researched using mass-gain, scanning electron microscopy-SEM, laser scanning confocal microscopy-LSCM, X-ray photoelectron spectroscopy-XPS and other techniques. The results showed and revealed that the corrosion was maximal at 60 °C after 200 h of exposure. The increase of temperature not only affected the solubility of oxygen gas in the thin film, but also promoted the transport of ions (such as Cl⁻), and the formation of protective AlO(OH), which further affects the corrosion speed.

The adsorption of isolated ${\mathrm{H}}_2\mathrm{O}$ on Pd {100} has been investigated by density functional theory calculations. We have presented a detailed picture for the adsorption of water monomer on various high-symmetry sites of the surface. We have demonstrated that other $d$ orbitals are responsible for the water adsorptions, in addition to the well-recognized role of $d_z^2$ orbital. Furthermore, $\mathrm{Pd}5\mathrm{s}$ state was found to play an essential role in water adsorptions including the favored on-top case. Our findings augment existing knowledge of the electronic nature of water-metal interactions.

A rapid degradation of wet adhesion is the key factor controlling coating lifetime, for the organic coatings under marine hydrostatic pressure. The mathematical models of wet adhesion have been studied by Grey System Theory (GST). Grey models (GM) (1, 1) of epoxy varnish (EV) coating/steel and epoxy glass flake (EGF) coating/steel have been established, and a lifetime prediction formula has been proposed on the basis of these models. The precision assessments indicate that the established models are accurate, and the prediction formula is capable of making precise lifetime forecasting of the coatings.

The corrosion behavior of pure Ti under a solid NaCl deposit in a wet O₂ flow at 600 °C has been studied. The results showed that the corrosion rate was greatly accelerated by solid NaCl, which destroyed the compact and protective TiO₂ scale to yield non-protective N₄Ti₅O₁₂ and other products. Detailed scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDX), and X-ray diffraction (XRD) analysis showed that, during the corrosion process, the metal (Ti) diffused outward rapidly and reacted with the wet O₂ to form a thick and porous corrosion products scale. The electrochemical reaction was also observed during the whole corrosion process at 600 °C, which further accelerated the corrosion rate. A possible mechanism has been proposed for pure Ti covered with a solid NaCl deposit in wet O₂ at 600 °C, based on the experimental results.