
Tungsten foil may be prepared by electropolishing in sulfuric acid-methanol for equation of state (EOS) target. The tungsten foil may be prepared with high surface quality (RMS roughness less than 50nm) and thickness uniformity beyond 99%, and may keep the density of raw materials so that this foil can satisfy the requirement of laser driven materials for the research of high temperature and pressure EOS. Thus, electropolishing is a significant method for preparing the foil which can fulfill the requirement…