METHOD OF COATINGS APPLICATION Russian patent published in 2001 - IPC

FIELD: treatment of article surface; applicable in mechanical engineering and instrumentation engineering. SUBSTANCE: method includes article oxidation for 45-100 min with current density of 25-35 A/sq.dm in electrolyte based on boric acid and potassium hydroxide; removal of external layer of coating 10-20 mcm thick and heating of articles with coating at least 70 mcm thick to temperature not below 490 C. Time of holding of article during heating amounts from 50 to 100% of oxidation time. EFFECT: production of articles with increased surface hardness and wear resistance. 1 dwg, 1 tbl, 1 ex