Abstract
Relations between contact period, chlorine demand, residual chlorine and chlorine dose were established in the chlorination of seawater samples collected near atomic power plants [1]. Nonpolar, presumably lipophilic organohalogens formed in seawater were studied. The principal component found in all seawater samples was CHBr3. Smaller quantities of CHClBr2 and traces of CHBrCl2 were found. CHCl3 was not present in significant amounts, CHBr3 was found in all unchlorinated sea-water samples analyzed [2]. To prevent biological fouling in cooling systems using seawater, a portion of seawater is electrolyzed in a cell and the chlorinated seawater is injected into the cooling system [3]. In a series of chlorination studies, the initial loss of chlorine reached a saturation level that appeared to be the true organic demand [4]. In case of deoxygenated stagnant seawater, a semilog relation was found between the residual chlorine concentration and corrosion rate. At 95° the corrosion rate was 4 fold that at 40°. The presence of a residual concentration of 0.1 ppm Cl under stagnant conditions increases the extent of corrosion by 5 to 10% compared to the case in which chlorine is absent [5].
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