Abstract: Grade 95 and 100 unleaded aviation gasolines were obtained by adding aromatic amine antiknock agent in a blank aviation fuel with MON of 93.7. The differences on abrasion resistance of metal in seat and swelling property of sealing element between unleaded aviation gasoline added aromatic amines and leaded fuel with similar MON number were analyzed by measuring the length of grinding crack of 40 Cr metal by ring-on-block experiments and observing mass and volume changes of rubber samples after soaked in gasoline. The results indicate that gasoline with aromatic amines shows worse performance on abrasion resistance and swelling property than leaded gasoline. Anti-oxidants may be employed in aromatic amines added aviation gasoline for weakening the swelling effect on rubber products and abrasion.

Key words: unleaded aviation gasoline, aromatic amine, abrasion resistance, swelling property