Protective coating of stub ends in anode assemblies
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United States of America Patent
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Oct 13, 1992
Grant Date -
N/A
app pub date -
Jun 10, 1991
filing date -
Jun 10, 1991
priority date (Note) -
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Abstract
The operating lifetime of mild steel stub ends in anode electrode assemblies for aluminum reduction cells is increased by providing a coating of stainless steel or other corrosion-resistant alloy on the stub end extending upward from its juncture with a carbon block anode in which the stub end is embedded. This prevents corrosion and resulting necking down of the stub, which would otherwise occur as a result of exposure of the stub end to fluorine or fluorine containing gases as well as solid particles. The coating may be applied by welding or metalizing procedures.
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