The evolution of corrosion behavior of 316 L stainless steels exposed to salt lake atmosphere for 8 years was investigated.The results showed that the stainless steel in salt lake atmosphere had a greater corrosion ra...The evolution of corrosion behavior of 316 L stainless steels exposed to salt lake atmosphere for 8 years was investigated.The results showed that the stainless steel in salt lake atmosphere had a greater corrosion rate during the initial exposure time and relatively lower corrosion rate during the subsequent exposure time.Dust depositions accumulated on the downward surface caused severe local corrosion of stainless steel.As exposure time prolonged,the relative amount of Croxide and Feoxidein the corrosion products gradually increased,which may directly affect the corrosion rate of stainless steels.Moreover,the maximum pit depth followed a power function with respect to exposure time.展开更多
The corrosion behavior of pure aluminum 1060 subjected to a wet-dry cyclic accelerated test in simulated Nansha marine atmosphere in the dark and under UV illumination has been investigated by means of scanning electr...The corrosion behavior of pure aluminum 1060 subjected to a wet-dry cyclic accelerated test in simulated Nansha marine atmosphere in the dark and under UV illumination has been investigated by means of scanning electron microscopy(SEM),electrochemical impedance spectroscopy(EIS),and Mott–Schottky measurements in this work.The results show that under the two conditions,the native oxide films are constantly destroyed and the thicknesses of the oxide films continuously decrease in the first 24 days of the corrosion test.In particular,UV illumination can diminish the pitting corrosion susceptibility of the native oxide films to an extent in terms of a photo-induced modifi cation of the native oxide film on the pure aluminum surfaces.Besides,UV illumination can also reduce the carrier concentration in the oxide films,thus reducing the conductivity and the corrosion rate.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51601199 and 51671197)。
文摘The evolution of corrosion behavior of 316 L stainless steels exposed to salt lake atmosphere for 8 years was investigated.The results showed that the stainless steel in salt lake atmosphere had a greater corrosion rate during the initial exposure time and relatively lower corrosion rate during the subsequent exposure time.Dust depositions accumulated on the downward surface caused severe local corrosion of stainless steel.As exposure time prolonged,the relative amount of Croxide and Feoxidein the corrosion products gradually increased,which may directly affect the corrosion rate of stainless steels.Moreover,the maximum pit depth followed a power function with respect to exposure time.
基金supported by the National Natural Science Foundation of China(No.51671197)the Special Project of the Chinese Academy of Sciences(No.XDA130040502)。
文摘The corrosion behavior of pure aluminum 1060 subjected to a wet-dry cyclic accelerated test in simulated Nansha marine atmosphere in the dark and under UV illumination has been investigated by means of scanning electron microscopy(SEM),electrochemical impedance spectroscopy(EIS),and Mott–Schottky measurements in this work.The results show that under the two conditions,the native oxide films are constantly destroyed and the thicknesses of the oxide films continuously decrease in the first 24 days of the corrosion test.In particular,UV illumination can diminish the pitting corrosion susceptibility of the native oxide films to an extent in terms of a photo-induced modifi cation of the native oxide film on the pure aluminum surfaces.Besides,UV illumination can also reduce the carrier concentration in the oxide films,thus reducing the conductivity and the corrosion rate.
