Improvement of the Current Efficiency of an Al-Zn-ln Anode by Heat-Treatment

J. C. Lin, H. C. Shih

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Aluminum anodes, each having one of several heat-treatments [namely as-cast (A), furnace-cooled (B), quenched (C), and quenched and aged (D-l)] were electrically coupled to structural steels to provide cathodic protection. The electrochemical potential of each galvanic couple depended on the type of heat-treatment: anodes A, B, and C exhibited a potential of-1.10V, and anode D-l was somewhat less negative at-0.95V. Empirical relationships between galvanic current density (ig) and area ratio (AR), based on 120h tests, have been established as follows.

Original languageEnglish
Pages (from-to)817-823
Number of pages7
JournalJournal of the Electrochemical Society
Issue number4
StatePublished - Apr 1987


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