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Photothermal Beam Deflection Study of Titanium Metal Corrosion by a Hot Lubricant

Volume 38, Number 6 (Dec. 1984) Page 804-807

Masujima, Tsutomu; Lloyd, Lindsay B.; Eyring, Edward M.

The applicability of the photothermal beam deflection (PBD) method in monitoring the corrosion of titanium metal by a perfluoropolyether lubricant was investigated in the 21°-270°C temperature range. The signal amplitude and rise time at lower temperatures (21°-150°C) were constant for a given amount of corrosion product. At higher temperatures (150°-270°C) thermal gradients in the sample cell caused correctable distortions of the PBD signal. The signal rise times in all cases were slow (1-2 s). Signal amplitude sensitivity to thermal gradients made kinetic measurements difficult, even on a long time scale. The PBD signal indicates that corrosion depends on the presence of molecular oxygen in the lubricant as well as upon temperature.