Passive Corrosion Behavior of Alloy 22 | Zendy

Raúl B. Rebak | Zendy; Joe H. Payer | Zendy

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Passive Corrosion Behavior of Alloy 22

Author(s) -

Raúl B. Rebak,

Joe H. Payer

Publication year - 2006

Publication title -

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

Language(s) - English

Resource type - Reports

DOI - 10.2172/893919

Subject(s) - alloy , corrosion , oxidizing agent , materials science , metallurgy , boiling , immersion (mathematics) , 6111 aluminium alloy , chemistry , mathematics , organic chemistry , pure mathematics

Alloy 22 (NO6022) was designed to stand the most aggressive industrial applications, including both reducing and oxidizing acids. Even in the most aggressive environments, if the temperature is lower than 150 F (66 C) Alloy 22 would remain in the passive state having particularly low corrosion rates. In multi-ionic solutions that may simulate the behavior of concentrated ground water, even at near boiling temperatures, the corrosion rate of Alloy 22 is only a few nano-meters per year because the alloy is in the complete passive state. The corrosion rate of passive Alloy 22 decreases as the time increases. Immersion corrosion testing also show that the newer generation of Ni-Cr-Mo alloys may offer a better corrosion resistance than Alloy 22 only in some highly aggressive conditions such as in hot acids

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