The invention discloses a
cathode shielding preparation method for a super-thick open-hole foam iron-
nickel filter material. According to the method, a foam through-hole
sponge is coated with conductive
graphite glue or subjected to chemical
nickel-plating to serve as an
electroplating cathode, a pure iron plate or an
alloy plate with a certain proportion of iron and
nickel is adopted as an
anode, and the
cathode, the
anode and a cathode shielding plate are put into an
electroplating solution with
ferrous chloride as main salt or
ferrous chloride and
nickelous chloride as main salt for
electroplating; a semi-finished product is subjected to heat treatment under the
reducing atmosphere /
inert gas shielding; and the finished product is
cut according to the technical requirements. Compared with the prior art, by means of the method, the good deep plating and even-plating are achieved, and the super-thick open-hole foam iron-nickel
filter material which is good in permeability, high in filtering efficiency and low in cost is formed, the content of impurities is reduced by over 20%, detection is conducted according to an HJ / T762-2001 test method, the removal rate generated when the method is applied to foam iron-nickel lampblack ranges from 85% to 94%, the
wind speed is 1.2 m / s, the pressure loss is less than 20 pa, the
economic benefits are increased remarkably, and the method has the great market popularization value.