This is particularly important where features of the system such as small radius bends, orifices, partly throttled valves, misaligned flanges, etc., which can generate turbulence, give rise to local high velocities which may accelerate corrosion. It follows that design and fabrication of the system should aim at minimizing turbulence raisers. Effect of Temperature Few data are available on the effect of temperature within the range normally encountered in seawater systems. Although oxygen solubility tends to fall with rise in temperature, the higher temperature tends to increase reaction rate. It is important to continue initial circulation of clean seawater long enough for initial film formation for all copper alloys.
More time is needed for winter than for summer start-ups.
For stainless steels and other alloys prone to pitting and crevice corrosion, increase of temperature tends to facilitate initiation of these types of attack. The net effect of these conflicting tendencies is not always predictable. Temperature also influences biological activity which may, in turn, influence corrosion.