Abstract
To investigate the atmospheric corrosion characteristics of metal materials of electric equipment in the atmospheric environment with high humidity and high chlorine industrial pollution, atmospheric accelerated corrosion tests of a typical power metal Q235 carbon steel and galvanized steel were carried out by the salt spray method. The corrosion kinetics, corrosion products, and morphology of both materials were investigated by the weight loss method, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The corrosion rate of carbon steel is larger than that of galvanized steel, and both drop with time. NaHSO3 promotes the formation of α-FeOOH in the corrosion process of carbon steel. The high-humidity and high-chlorine environment is not conducive to the formation of Fe3O4. The interaction of NaHSO3 and NaCl promotes the generation of corrosion products, mainly NaZn4SO4(OH)6Cl·6H2O, in galvanized steel by pitting corrosion.
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