The purpose of this paper is to review corrosion problems encountered in U. S. Steel Corporation facilities, the nature of which and the solution to which may be of interest to engineers and designers involved in coal-conversion systems. The discussion will be presented by following the processing steps through which coke-oven gas (COG) passes from the coke batteries to the various coal-chemical-recovery operations. The various sections to be discussed are as follows: Section I - Primary COG Coolers; Section II - Final COG Coolers; Section III - Tar and Light-Oil Refining Equipment. These sections are identified in Figure 1.

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