Abstract
The effects of boric acid and lithium hydroxide on corrosion behaviors of 316LN stainless steel (SS) in simulating hot functional test (HFT) high-temperature pressurized water at 573 K are investigated. Increasing the concentration of boric acid or lithium hydroxide degrades the corrosion resistance of 316LN SS. Boric acid is recommended for HFT water chemistry, while lithium hydroxide alone is inappropriate as HFT water chemistry. The solubility of oxides in high-temperature pressurized water is calculated and the mechanism of oxidation is discussed. A promising HFT water chemistry is also proposed.
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