Effect of UV Illumination on the NaCl-Induced Atmospheric Corrosion of Pure Zinc

Abstract

The effect of ultraviolet (UV) illumination on the NaCl-induced atmospheric corrosion of pure zinc was investigated in this work. UV illumination affects the atmospheric corrosion morphology and corrosion rate of zinc. The NaCl-induced atmospheric corrosion rate of zinc increases significantly under UV illumination, which can be attributed to the photovoltaic effect of the corrosion products with semiconductor properties. The photoinduced electrons and holes, which are generated by the corrosion products with semiconductor properties under UV illumination, participate in the corrosion reactions and thus affect the atmospheric corrosion rate of zinc.

Enhanced inhibition of steel corrosion by L‐cysteine under visible‐light illumination

“…It can be seen that the topography image of the specimen collected in dark condition presents small cluster features together with channels, which could facilitate chloride ions and oxygen migration. [48] By contrast, the height profile shows an improvement in the surface homogeneity for the illuminated specimen, which could contribute to the enhanced corrosion inhibition property. For further revealing chemical bonding state, the corresponding chemical varieties were studied by FT-IR and CRM.…”

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

“…The variations of the OCP of the coupled FeOOH thin-film photoelectrode and 09CuPCrNi WS electrode in the absence and presence of visible light are the socalled photo-voltages, which can be used to qualitatively characterize the photovoltaic effect of the semiconductor material on the potential changes of the coupled substrate metal. This can be easily obtained by measuring the OCP variations of the rusted samples as shown in previous work from the authors' laboratory [9,10,13]. The photoinduced current densities between the FeOOH thin-film photoelectrode and 09CuPCrNi WS electrode in the absence and presence of visible light can be used to quantitatively characterize the role of the photovoltaic effect of the semiconductor material on the corrosion of the coupled substrate metal.…”

“…The separated electrons and holes would, subsequently, affect the atmospheric corrosion reactions. Currently, studies of the effect of light illumination on the atmospheric corrosion process are relatively few [12][13][14][15][16]. However, it is of great practical significance to explore the role of light illumination on the atmospheric corrosion of metals since most of the metallic materials are exposed under atmospheric environments and directly receive the solar light irradiation.…”

“…They found that UV has a strong acceleration effect on the NaCl-induced atmospheric corrosion of copper due to the promotion of the formation of cuprite. Song and Chen [13] reported that UV illumination resulted in a significant increase in the NaCl-induced atmospheric corrosion rate of zinc. Wiesinger et al [14], Chen et al [15], and Liang et al [16] studied the role of UV illumination on the early atmospheric corrosion stages of silver.…”

UV illumination on the atmospheric corrosion of Q450 weathering steel depositing with NH4Cl

“…Preliminary exploration and research on sodium salt and light illumination on zinc and steel were carried out. [5][6][7] In addition, the investigations of the influence of ammonium salts along with UV illumination on the atmospheric corrosion of iron-based metal were also scarce. In recent years, unexpected corrosion failures caused by ammonium salts have captured more and more attentions.…”