. . . . . . . "TD NiCr was exposed to a Mach 1, 1-atmosphere gas stream at 1204 C for times up to 50 hours. Weight change, metal thickness loss, X-ray diffraction, metallographic, and electron microprobe analyses were made. Neither surface preparation nor thermal cycling had an appreciable effect on the results. Initially, Cr2O3 formed and volatilized, allowing a rapid metal loss rate of 40 microns per hour. After about 1 hour the Cr2O3 broke down, resulting in an NiO overgrowth. The metal loss rate then slowed to 2.5 microns per hour and remained constant to 50 hours."@en . . "Match 1 oxidation of thoriated nickel chromium at 1204°C (2200°F)" . . "NASA TN D-6562"@en . "Mach 1 oxidation of thoriated nickel chromium at 1204° C (2200° F)"@en . . . . . . . . "Mach 1 oxidation of thoriated nickel chromium at 1204° C (220° F)" . . . .