Laboratory-unit investigations of palladium-treated titanium foil for dry scrubber application

Titanium foil is employed for electron transparent windows in the electron beam dr scrubber process. The foil suffers corrosion, which limits the wind ow life. Here, the examination or a palladium-coated window, prepared by io n beam assisted deposition and plasma source ion assisted deposition (PSIAD ), after service in a pilot-scale plant is reported. Most significantly, th e adhesion of the coating was reduced by the flue gas. Where the coating re mained adherent. corrosion was negligible. Elsewhere, general, intergranula r and pitting corrosion occurred. A PSIAD coating provided the best perform ance. (C) 2001 Elsevier Science Ltd. All rights reserved.