Corrosion and hydrogen evolution inhibitors for current-producing cells having zinc anodes
AssigneeDuracell Inc.
InventorsFrank E. Parsen, Eleanor J. Rossler
Life of this patent
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Abstract
Corrosion and hydrogen evolution in a current-producing cell possessing a predominantly zinc anode and an aqueous alkaline or acidic electrolyte is significantly inhibited by the addition to said cell of a zinc corrosion and hydrogen evolution-inhibiting amount of at least one chelating agent selected from the group consisting of aminocarboxylic acid, polyamine and aminoalcohol.
Claims14
A current-producing cell having a cathode, an anode, an electrolyte selected from the group consisting of an alkaline electrolyte having a pH greater than about 9 and an acidic electrolyte having a pH less than about 5 and at least one electrolyte-carrying separator disposed between said cathode and said anode, the combination being retained in a conductive container having a positive terminal electrically associated with said cathode and a negative terminal electrically associated with said anode, said terminals being electrically insulated from each other, said anode being predominantly zinc;
- and said cell having therein a corrosion and hydrogen evolution-inhibiting amount of at least one chelating agent selected from the group consisting of aminocarboxylic acid, polyamine and aminoalcohol.
A process for inhibiting zinc corrosion and hydrogen evolution in a current-producing cell which has a cathode, a predominantly zinc anode, an electrolyte selected from the group consisting of an alkaline electrolyte having a pH greater than about 9 and an acidic electrolyte having a pH less than about 5, and at least one electrolyte-carrying separator comprising incorporating in said cell a zinc corrosion and hydrogen evolution-inhibiting amount of at least one chelating agent selected from the group consisting of aminocarboxylic acid, polyamine and aminoalcohol.
Dependencies are inferred from the claim text.