Corona Corrosion of Aluminum in Air

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Abstract
Aluminum suffers severe pitting corrosion when used as an anode in negative corona discharges in ambient air. This paper gives a comprehensive account of the electrochemical interaction between a low electric field metal surface, especially aluminum, and the unipolar gaseous electrolyte created by an air corona. Introductory sections on coronas and corona corrosion give the necessary background. Physical and chemical analysis of the gaseous, liquid, and solid corrosion products of aluminum in air coronas demonstrate their close resemblance to the products formed in aqueous nitrate electrolytes.

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