Abstract
The inhibition of corrosion of aluminum in alkaline solution is a difficult problem, according to Evans, possibly because of the specific adsorption of OH on the metal surface. The presence of hard bases, acting as anode inhibitors, revealed high % inhibition; Cr 2O 7 −− < HCO 3 − < B 4O 7 −−, of aluminum in 0.5 n KOH at 28°C. At constant inhibitor concentration (⩽ 5 mM) of these bases, the % inhibition is compared with time of exposure and potentodynamic measurements were corroborated in the discussion of these results.
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