PROCEDEU DE GRAFITIZARE A NEGRULUI DE FUM

摘要

The process comprises addn. of dinaphthyl-methane disulphonic acid to dispersion system. Buffer mixt. of ammonia and ammonium chloride is also applied with strong agitation at room temp. This gives concentrated colloidal soln. of semi-graphitised material which after stabilisation for 10-15 minutes is settled and filtered. Coarse residue is removed, for completion of treatment using CO2, in the prod. of corrosion-resistant material.