Zinc dissolves rapidly in NaNO3-NH4Cl-NH3-H2O with rates of 0.375 to 2.16 g./cm2- hr being observed at 25.0 ± 0.1 C. The reaction occurs via complexion of the zinc ion with ammonia in NH4+ buffered solutions. The cathodic reaction is primarily the reduction of NO3− to NO2−, NO2−, NH2OH, and NH2NH2 are shown to be reactive with Zn but not significantly so.

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© 1968 National Association of Corrosion Engineers
1968
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