Laboratory tests of corrosion potentials of engineering materials under influence of additions of chlorine and chlorite were measured. Materials were an Al-alloy, 316L stainless steel, 6Mo stainless, 3 duplex stainless steels, CuNi, Ti & carbon steel.
07260 2007 CP
Sea water systems on many offshore platforms are treated with small amounts of chlorine to prevent marine growth inside piping and equipment. It is well known that small additions of chlorine increase the oxidation strength (corrosion potential) of Ti and stainless steels in sea water. Regarding Al, CuNi and carbon steel, it is difficult to find the effect of chlorine on these materials described in the literature. Therefore, during laboratory tests the corrosion potentials of engineering materials under influence of additions of chlorine and chlorite were measured. The investigated engineering materials were an Al-alloy, 316L stainless steel, 6Mo stainless steel, 3 grades of duplex stainless steels, CuNi, Ti and carbon steel. A systematic test program for these engineering materials was carried out with chlorine and chlorite rest levels of 0.5 ppm, 5 ppm, 50 ppm and 500 ppm.
Keywords: fresh water, seawater, 3.5% NaCl , engineering materials, chlorite, chlorine, electrochemical potentials.