METHOD OF MAKING CHROMATE ANTICORROSIVE PIGMENT Russian patent published in 2010 - IPC C09D5/08 C09C1/34 

FIELD: chemistry.

SUBSTANCE: described is a method of making chromate anticorrosive pigment involving suspension of spent chrome-aluminium catalyst in aqueous solution of calcium nitrate and barium nitrate, taken in amount of 10-30% and 5-25% of the mass of catalyst respectively, in mass ratio of catalyst to the said nitrates equal to 65-70:30-35 respectively, dehydration of the obtained mixture with subsequent calcination at 800-900°C for 3-6 hours and grinding. The obtained pigment has anticorrosive effectiveness which surpasses that of the closest analogue by 6-40% and has lower cost.

EFFECT: use of pigment in ground coating improves anticorrosive properties of the coating and increases environmental friendliness.

1 cl, 1 tbl, 15 ex