Houghton Chemical Corp. - SAFE-T-THERMŽ corrosion data

SAFE-T-THERM^Ž PROPYLENE GLYCOL BASE HYDRONIC HEAT TRANSFER FLUID Comparative Corrosion Test Data - Using ASTM D1384 Text Method
	SAFE-T-THERM^Ž,1		Boston Tap Water²		Propylene Glycol Uninhibited^2,3
	*	**	*	**	*	**
Copper	-13	0.5	-10	0.4	-2	0.1
Solder	-10	0.3	-140	5.6	-750	3.0
Brass	-3	0.1	-10	0.4	-2	0.1
Steel	-22	0.8	-300	14.7	-1	< 0.5
Cast Iron	-4	0.2	-570	24.1	-1	< 0.5
Aluminum	-3	0.4	-34	4.0	-4	0.5

Data shown for SAFE-T-THERM^Ž are an average of many tests. Houghton Chemical Hydonic Fluid test data shown are typical, not varying significantly from test to test, indicating uniform and effective corrosion protection
Data shown for tap water and propylene glycol are averages of several test observations. Actual data varies dramatically from test to test and are always indicative of high corrosion rates.
Neat propylene glycol with no corrosive water

* Losses shown are in milligrams per test coupon

** Loss expressed in mills per year thickness of metal, approximate

SAFE-T-THERM^Ž is a registered trademark of Houghton Chemical Corporation