Methods of testing a honeycomb filter

摘要

Methods of testing a honeycomb filter for defects include the step of wetting at least one of the first end portion and the second end portion to provide at least one wetted end portion. The method further includes the step of monitoring the second end portion for fog passing through the filter.

主权项

1. A method of testing a honeycomb filter comprising the steps of:
(I) providing a honeycomb filter including an intermediate portion disposed between a first end portion and a second end portion along a length of the honeycomb filter, the honeycomb filter including honeycomb network of channels defined by a plurality of intersecting porous walls, wherein the honeycomb network of channels extend along the length of the honeycomb filter between the first end portion and the second end portion; (II) wetting at least one of the first end portion and the second end portion to provide at least one wetted end portion, wherein the wetted end portion has a higher degree of wetness than the intermediate portion; (III) flowing a fog with moisture droplets into the honeycomb network of channels at the first end portion of the honeycomb filter; and (IV) monitoring the second end portion of the honeycomb filter for moisture droplets of the fog exiting the honeycomb network of channels.