| abstract |
FIELD: chemistry. n SUBSTANCE: method for removing hydrogen from a billet includes the steps of immersing the billet in a bath with an aqueous electrolyte solution containing citric acid with a concentration of less than or equal to 982 grams per liter, ammonium hydrofluoride with a concentration greater than or equal to 2 grams per liter and strong acid, the concentration of which is not more than 3.35 g/l, the billet is connected to the anode of the DC power supply and the cathode of the DC power supply is immersed in the bath, and then a current less than or equal to 538 A/m 2 is passed, and also an oxygen barrier is formed on the surface, which performs the function of removing hydrogen from the metal. n EFFECT: improving the quality of electrolytic treatment, reducing the hazardous effects of strong acids and the cost of recycling the waste solution used. n 8 cl, 12 dwg, 9 tbl, 3 ex |