TESTS OF A NEW ANTI-FREEZE
Page 21
If you've noticed an error in this article please click here to report it so we can fix it.
TO meet the present shortage of glycerine and of ethylene glycol, the County Chemical Co., Ltd., Bradford Street, Birmingham, has evolved a 1939 Improved Formula for its well-known Stop It Freezing. The compound now includes neither of these bases, but is, nevertheless, neither volatile nor inflammable within the meaning of the Act.
Results of tests by an independent scientific authority show that a 121-percent. solution in water gives protection against 15 degrees of frost, and a 25per-cent. solution is proof against 31 degrees of frost.
Strips of various metals were immersed in beakers of a 50-per-cent. solution of Stop It Freezing (1939 Improved Formula), and similar strips were subjected to the same treatment in Birmingham tap water, with results which are instructive. Each day for a week all the samples were heated to about 70 degrees for three hours and at the end of the week the loss by corrosion was weighed. In the following table the loss is shown in grammes:—
Metal. Tap Water. Freezing.' Steel 0308 .0003 Cast iron ... .. .0333 .0030 Aluminium .0008 .0009 Copper .. .0010 .0006 Solder ... ... .0018 .0015
Strips of rubber subjected to similar treatment showed no visible effect. The specific gravity of this liquid is 1.16, and the boiling point of the solution is higher than that of water. Prices remain unchanged.