Lacquer Porosity Test Apparatus

This equipment is specially designed for testing of the porosity of lacquer / wax which is internally coated on metallic (aluminum) tubes as per ISI std. The coated tube is filled with test-solution containing copper sulphate and copper electrode is immersed in this solution. The tube itself makes contact with the cathode and fixed small D.C. potential is then applied between the sliding top copper whose flow is proportional to the areas of the surface not covered by internal coating. In addition visual indication is provided by deposition of copper if coating is not continuous