Heat transfer fluid compositions for cooling systems containing magnesium or magnesium alloys
US7645331B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2006 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Oct 16, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F19/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In one embodiment, a corrosion inhibiting composition is formed by combining: (a) an inorganic phosphate; (b) a water soluble polyelectrolyte polymer dispersant; (c) a tri or tetracarboxylic acid; and (d) at least one additional component comprising at least one of a C4-C22 aliphatic or aromatic mono- or dicarboxylic acid, a silicate and at least one of a silicone or a silicate stabilizing siloxane compound, and mixtures thereof. Also disclosed are heat transfer fluids that include about 5% to about 99% by weight of freezing point-depressing agent; about 1% to about 95% by weight of water; and the disclosed corrosion inhibitor composition. A method of reducing corrosion in a heat transfer system containing one or more components that contain magnesium or a magnesium alloy requires that the system and the magnesium containing components be in contact with the disclosed heat transfer fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.