Mechanism of Pitting Corrosion Prevention by Nitrite in Carbon Steel Exposed to Dilute Salt Solutions | Zendy

Philip E. Zapp | Zendy; J. W. Van Zee | Zendy

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Mechanism of Pitting Corrosion Prevention by Nitrite in Carbon Steel Exposed to Dilute Salt Solutions

Author(s) -

Philip E. Zapp,

J. W. Van Zee

Publication year - 1999

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/831168

Subject(s) - nitrite , nitrate , carbon steel , dietary nitrate , salt (chemistry) , corrosion , chloride , sulfate , pitting corrosion , electrolyte , carbon fibers , oxide , chemistry , metallurgy , materials science , composite material , organic chemistry , composite number , electrode

The overall goal of this project is to develop a fundamental understanding of the role of nitrite in preventing the breakdown of protective oxide(s) on carbon steel and the onset of pitting. Pitting corrosion of carbon steel exposed to dilute alkaline salt solutions can be induced by nitrate, sulfate, and chloride ions and is prevented by sufficient concentration of nitrite. A significant example of this material/electrolyte system is the storage and processing of DOE's high-level radioactive liquid waste in carbon steel tanks. Added nitrite in the waste has a considerable downstream impact on the immobilization of the waste in a stable glass form. Waste tank integrity and glass production efficiency may benefit from the fundamental understanding of nitrite's role in preventing pitting

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