Abstract
Cathodic protection of steel and cast iron in a chemical plant is economically justified and feasible from an engineering point of view under certain conditions. Magnesium anodes are useful under conditions which meet are restrictive as to space and accessibility. Principal use of magnesium anodes for cathodic protection of portions of the Dow Chemical Company's Freeport, Texas, plant were in structures handling large volumes of sea water and brine both static and in motion. Studies indicate the cost of the remedial measures is much less than would be the cost of replacing structures corroded to destruction, even when considerations of uninterrupted service, loss of production from down time and other factors are disregarded. Experimental installations are being studied and new aspects of the possibilities are constantly being investigated.
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