Abstract
The U. S. DOE-sponsored Atmospheric Fluidized-Bed Cogeneration Air Heater Experiment (ACAHE) is intended to assess the performance of various heat exchanger materials in order to establish confidence in the resultant designs of fluidized-bed combustion (FBC) air heater systems. Westinghouse Electric Corporation is preparing specifications and hardware for the ACAHE. Argonne National Laboratory, through a contract with the Rocketdyne Division of Rockwell International, will conduct the tests in the DOE 6-ft x 6-ft atmospheric fluidized-bed combustion facility in El Segundo, CA. A laboratory test program is in progress to evaluate the corrosion behavior of several metallic alloys, coatings, claddings, and weldments in support of the ACAHE experiment. Results are presented from two tests, each of 3000-h duration, conducted at meal and gas temperatures of 871 and 899°C, respectively. Detailed information is also presented on the corrosion scale morphologies, scale compositions and thicknesses, intergranular penetration of the substrate material, and metal recession. These tests have provided corrosion information on a variety of ASME-coded and noncoded structural materials under a well-characterized laboratory test environment simulating the atmospheres in bubbling- and circulating-bed combustors.
