Ferrophosphorous composition having improved conductivity and pa

Details Ferrophosphorous composition having improved conductivity and pa Ferrophosphorous composition having improved conductivity and pa

1987-12-07

1989-05-09

Barr, Josephine

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 123, 106 126, 106 127, 106 129, 106 105, 106 112, 523137, 252512, 252513, 252518, 252519, 252516, 252521, 252500, 524440, 524422, 524435, 524436, 524438, B22F 700, H01B 106

Patent

active

048286141

ABSTRACT:
A ferrophosphorous composition with improved conductivity and passivation resistance in prepared by treating ferrophosphorus particles with an aqueous solution containing a dilute mineral acid and ions of chromium and metal selected from the group consisting of zinc, strontium, calcium, barium, lead or copper. In a preferred embodiment, the concentration of chromium and zinc ions in the solution is in the range of about 2 grams/liter to about 10 grams/liter, and the treatment time is from about 2 to about 6 minutes.
The treated ferrophosphorous particles can be formulated in a suitable resin binder for use as corrosion resistant coatings, weldable coatings, EMI shielding coatings or electrically conductive coatings. The treated ferrophosphorus particles can also be used in powder metallurgy applications.

REFERENCES:
patent: 3562124 (1984-05-01), Leon et al.
patent: 4447492 (1984-05-01), McKaveney
patent: 4517118 (1985-05-01), Stoetzer
patent: 4728462 (1988-03-01), Miller et al.

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