Process for repatination of old restored bronze and brass articles

摘要

the invention relates to the preservation of cultural heritage, and is a process of repatinare restored by pasivarea shallow areas of old bronze and brass uncovered during archeological digs or those in museum collections, which have suffered displacement interference the evolutionary effects of degradation by corrosion.the essence of the invention lies in that the process includes the application of pentasulfura alcoholic dispersion, containing antimony, as pasivant agent, and two additives consisting of phosphorus pentoxide or orthophosphoric acid (40%) and thiourea, report table, alcohol: sb2s5: p4o10: sc (nh2) 2 = 40: 8: 1: 1 or alcohol: sb2s5: u00cd3po4: sc (nh2) 2 = 39: 8: 2: 1, properly.dispersion is achieved by mojararea alcoholic soft solid components, first separately, then in the mixture, adding quantity of gradual dose alcohol and apply on the surface clean, at room temperature for 5 - 10 minutes, then the surface is treated repeatedly in 2.3 hours, with subsequent washing with alcohol and drying at high temperature 35u00b0c relative humidity less than 30%. then apply an additional protective film, containing alcoholic solution of propolis, burning liquid sprays and paraffin wax or resin siliconica.the result is getting a skates protection, uniform thickness and color, good weather resistant, with adhesive properties.