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Abstract
The corrosion behavior of steel exposed to a simulated marine atmosphere at different temperatures (from 30 to 60 °C) has been investigated. The corroded specimens were analyzed gravimetrically and by scanning electron microscopy, x-ray diffraction and electrochemical techniques. The results revealed that the morphology of volcanic bulge can be observed on the sample surface at 60 °C, which can be attributed to the effect of temperature on the diffusion rate of ions. As the exposure temperature is increased, the relative content of the main corrosion products changed greatly. The increase in temperature not only promoted the transport of aggressive ions Cl− and the formation of local corrosion, but also affected the solubility of oxygen gas in the thin film, leading to the increase in the relative content of Fe3O4 and the acceleration of corrosion.
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