High-temperature uniform corrosion and electrochemical corrosion behavior of 321 stainless steel in uranyl nitrate solutions with different concentrations and pH values were studied by weighing and electrochemical methods.

The uniform corrosion test results show that under the selected corrosion conditions, the 321 stainless steel sample within 960h, no significant change in surface finish, corrosion rate of less than 0.04g/m2, corrosion resistance in low acidity uranyl nitrate solution.

The corrosion electrochemical characteristics of 321 stainless steel in uranyl nitrate solution with dissolved oxygen were studied by corrosion electrochemical method. The corrosion potential and corrosion current density of the electrode were measured.

The AES analysis showed that there was a certain amount of uranium in the corrosion film after electrochemical etching, and the thickness of the uranium-containing corrosion film was 10 to 15 nm.

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