The Baytown cooling towers experienced severe fungal and considerable chemical attack in the 1948-1953 period1. During 1953, cooling water treatments were converted to the low pH, corrosion inhibitor, intermittent chlorination practices that are general today. The inhibitor eventually adopted and generally used throughout the plants is the chromate-zinc-phosphate system2. Earlier discussions of chlorination3 and of cooling water problems generally4 have been presented. Early in 1973, clarification of the river water makeup was started. With the silt limitations eliminated, it is expected that cycles of concentration will be increased from about 5.0 to about 7.0 and that the Baytown plants will remain in compliance with respect to heavy metals disposal.

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