| The vanadium-containing fuel oil can cause serious high-temperature corrosion of facilities during combustion, particularly containing sulfur and sodium as impurities in the residual oil, which is usually called as vanadium corrosion. However, the researchers haven't made a consistent conclusion about the mechanism of vanadium corrosion and found an effective measure to inhibit it. It is necessary to clarify the process of vanadium corrosion. The paper mainly studied the effect of vanadium on the material corrosion in the following two aspects. On the one hand, the effect of vanadium on A3 steel in high-sulfur residual oil system; on the other hand, the corrosion behaviors of A3 steel with/without-aluminizing layer in the molten vanadate.Based on the present results, we concluded that the corrosion of A3 steel was not vanadium corrosion but sulfidation that was caused by active sulfur in high-sulfur residual oil system; vanadium can accelerate sulfidation to some extent. A3 steel encountered not only serious vanadium corrosion but also sulfidation in the molten vanadate; aluminizing layer can inhibit vanadium corrosion in short time and lessen the sulfidation of A3 steel.
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