Protection of aluminum based structures against heat...

Details Protection of aluminum based structures against heat... Protection of aluminum based structures against heat...

F - Mech Eng,Light,Heat,Weapons

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123/158, 123/168

F01P 3/00 (2006.01) C03C 4/00 (2006.01) C09K 5/20 (2006.01) C23F 11/18 (2006.01)

Patent

CA 1195568

ABSTRACT OF THE DISCLOSURE A method is disclosed of protecting heated aluminum based metals subject to heat transfer through the metal to a circulating aqueous cooling solution in contact therewith. The initially constituted cooling solution con- tains an alkali metal silicate in an adjusted amount above .2 gram per liter. The solution while functioning in the cooling system is then exposed to an alkali metal silicate glass causing the glass to progressively dissolve and stabilize the silicate at a level of at least .1 gram per liter. The initially prepared solution may also contain ethylene or propylene glycol, alkali metal phosphates and tetraborates in a ratio greater than 4:1, and nitrate, mer- captobenzothiazole or tolyltriazole.

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