The most common and dominant influences on iron’s ability to stay in solution are temperature and acid concentration. percent sulphuric acid concentration and increase with load and acid temperature. in the past, there have been instances where acid lines have been accidentally struck and have failed catastrophically. Cast irons Grey cast iron will resist higher velocities (up to around 1.8 m/s, 6 ft/s) than steel because of a locking effect of the Pickling activity of acid was determined by measurement of mass loss of sheet specimens and analytical determination of the increase of iron amount in the set of artificially inoculated H 2 S0 4 solutions after pickling. sulphuric acid) then enters the absorbing towers where it reacts to form sulphuric acid. The solubility of iron in sulfuric acid solution is controlled by several variables. Grey cast iron is no longer recommended for use in sulphuric acid plants. Sulphuric acid + iron (III) sulphate. The corrosive wear rate of cast iron was found to reach a maximum at around 35 wt. Cast iron is easily machined because the graphite in the iron acts as a lubricant during machining. About 35% of the heat ... limited by the iron specification in the product acid. The manipulation of these two interacting forces can result in either an excellent quality, clean These corrosion data are mainly based on results of general corrosion laboratory tests, carried out with pure chemicals and water solutions nearly saturated with air (the corrosion rate can be quite different if the solution is free from oxygen). The wear rate of cast iron and the corrosion potential (Ecorr) and current (Icorr) were measured in sulphuric acid in order to study the mechanism of corrosive wear of cast iron.