Abstract: A method for the removal of rust deposits from the interior walls of fluid conduits comprising the steps of preparing a shaped compound consisting of iron oxides and manganese oxides as primary elements, at least one oxide of Cu, Ni, Cr, Zn, Co, Mg, Ti, V, Sn, Ba, Y and Gd as secondary elements and at least one silica oxide, silicate salt, aluminum oxide and aluminum salt as a binding element. When chlorine containing water is contacted with the compounds, the water is activated to dissolve iron rust scales which have adhered to the interior of the pipe walls thereby facilitating removal while providing a protective coating onto the pipe walls.