1962•Corrosion engineering digestOpen access
The Corrosion of Aluminum and Its Alloy Caused by Addition of Acid, Alkali, Oxidizing Agents and Reducing Agents
Junichi Kanazawa
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Abstract
It is a well-known fact that aluminum is an amphoteric compound and is corroded by acid and alkali. In the present study, small quantities of oxidizing agent and reducing agent were added to acid and alkali and their effects on corrosion were examined.For the experiments, HCl, H2SO4 and HNO3 were used as acids, NaOH as alkali, KMnO4 and K2Cr2O7 as oxidizing agents, and SnCl2 and NaHSO3 as reducing agents.The result revealed that corrosion was most active when SnCl2 was used, and was next active in the cases of KMnO4 and K2Cr2O7.From the above fact, it has become known that coexistence of heavy metal ions, no matter whether they are oxidizing agents or reducing agents, accelerates corrosion.Similar experiments were carried out on duralumin.
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