| abstract |
The soln. comprises benzotriazole, methyl benzotriazole and/or tetrahydrobenzotriazole dissolved in an amine salt of a carboxylic or phosphoric acid, a trialkyl phosphate ester, an aminealkyl benzyl sulphonate or mixts. of these. The solns. are added to lubricants to prevent corrosion of machine parts eg. hearings esp. by S-contg. oils. Solubility of the benzotriazole or derivs. in oil is increased around 9 times, and the corrosion-inhibiting action increased, so that a smaller amount can be used. In an example 0.3% of a mixt. of 400 g isohexanic acid, 250 g isodecylamine and 350 g benzotriazole is dissolved in paraffinic spindle oil at 22 degrees C. |