Abstract
Hydrogen overpotential on uniformly prepared Zn alloys of Hg, Pb, and Cd in 
solution are measured. The effect of small amounts of iron evenly distributed in the sample on the overpotential of Zn‐Hg and Zn‐Pb alloys are also observed. Exchange current densities 
and transfer coefficients (α)for the hydrogen evolution process on these surfaces are obtained.