Abstract
Additional experiments have been carried out to test the convective flow theory of zinc electrode shape change. The assumptions implied by the theory that overpotential and current distribution should be uniform over a flat rectangular porous zinc electrode operated with severely limited convective flow are not supported by these measurements. Several possible explanations of the observed behavior are suggested. Evidence of deterioration of anodic performance of the limited flow porous zinc electrode on cycling is presented. A flooded, non‐vented 
reference electrode without head space is described.