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The effect of formulations and procedures to deposit thin active layers based on\udlow surface area powders on complex geometry substrates (open-cell foams) was\udexperimentally assessed. An acid-free liquid medium based on water, glycerol, and polyvinyl\udalcohol was used for powder dispersion, while a dip-coating technique was chosen for\udwashcoat deposition on 30 PPI ceramic open-cell foams. The rheological behavior was\udexplained on the bases of both porosity and actual powder density. It was proved that the use\udof multiple dippings fulfills flexibility requirements for washcoat load management. Multiple\uddepositions with intermediate flash drying steps at 350 °C were carried out. Washcoat loads\udin the 2.5 to 22 wt. % range were obtained. Pore clogging was seldom observed in a limited\udextent in samples with high loading (>20 wt. %). Adhesion, evaluated by means of\udaccelerated stress test in ultrasound bath, pointed out good results of all the deposited layers

Washcoat Deposition of Ni- and Co-ZrO2 Low Surface Area Powders onto Ceramic Open-Cell Foams: Influence of Slurry Formulation and Rheology