The erosion of dust collection electrode and distribution of water film are the main factors affecting stability and reliability in successive operation of wet electrostatic precipitators (WESP). To address these problems

modification of carbon steel made by cold rolling was made to provide corrosion protective coating and additional water affinity. The surface wetting characteristics of various modified anode plates were investigated under single strand feed water condition. The influence of Reynolds number on surface wetting characteristics of optimum modified plate was studied

aiming at providing theoretical foundation of rinse water distribution of WESP. Corrosion protective coating had negative impact on the surface wetting characteristics of substrate. With similar surface wetting characteristics

epoxy resin and glass fiber cloth Ⅰ had no effect on hydrophilic modification. The surface wetting characteristics of epoxy resin modified by sand

glass beads and glass fiber filament were similar and had little effect on hydrophilic modification. TL carbon fiber cloth had the largest liquid holdup of 0.0028—0.0054 g·cm-2

increased by 1.0—2.2 times compared with carbon steel sheet (CSS). Sand needed the least surface flow rate to wet the whole test sample

which was decreased by 36% compared with CSS; while sand had the largest film rate

increased by 50%—60% compared with CSS. The average thickness of water film was about 0.3—0.7 mm

and TL carbon fiber cloth could reach 1.4 mm. The degree of tightness of glass fiber cloth attached on the surface of epoxy resin depended on adhesion technology

which had direct effect on surface wetting characteristics. GFC series modification methods (GFCⅡ

GFCⅢ

GFCⅣ) had favorable effect on hydrophilic modification

and average thickness of water film was less than 0.35 mm. GFCⅢ

GFCⅣ surface could get wetted quickly

and critical time was shorter than 3 min. Surface flow rate of GFCⅡ

GFCⅢ

GFCⅣ could decrease by 94%—97% compared with CSS to wet the same size surface. Among them

adhesion technology Ⅲ had the best performance. The pitch of blowhole could be set as 10 cm or wider. Effective washing could be obtained

when the waves on the liquid film were fluctuating laminar at Reynolds number about 2000.