Abstract
Abstract Samples were made from free machining AISI 440C stainless steel. They were identically hardened and tempered at 16 different tempering temperatures. The samples were then given five different surface finishes (i.e., grit blast, chro honed, ball burnished, ground and carborundum blast). After initial weighing the samples were subjected to a corrosion environment of JP-4 fuel and water. The samples were removed at varying times, cleaned, and again weighed. Weight losses were compared for different tempering temperatures and different surface finishes. From the test results it was concluded that: (1) This steel should not be heated above 400 C (750 F) for greatest corrosion resistance, (2) Corrosion is greater when no JP-4 fuel is above the water, (3) The order of corrosion resistance was due largely to surface roughness of the different finishes. This order, in decreasing corrosion resistance, is as follows: (a) Ground surface, (b) Ball burnished, (c) Carborundum blast, (d) Chro honed, (e) Grit blast. 6.2.5
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