WO1995008053A2 - Liquide de refroidissement a effet corrosif limite pour moteur a combustion interne - Google Patents
Liquide de refroidissement a effet corrosif limite pour moteur a combustion interne Download PDFInfo
- Publication number
- WO1995008053A2 WO1995008053A2 PCT/RU1993/001000 RU9301000W WO9508053A2 WO 1995008053 A2 WO1995008053 A2 WO 1995008053A2 RU 9301000 W RU9301000 W RU 9301000W WO 9508053 A2 WO9508053 A2 WO 9508053A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- approximately
- range varying
- potassium
- coolant
- quinisarin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
- F01P2011/066—Combating corrosion
- F01P2011/068—Combating corrosion chemically
Definitions
- the present invention relates to a coolant with limited corrosive effect, in particular for internal combustion engines, in particular those used in regions where the ambient temperatures drop below 0 "C, also called antifreezes.
- the invention relates to also the use of a new anti-corrosion agent with regard to certain metals.
- the coolants generally used are mainly composed of ethylene glycol which has a low freezing temperature, of the order of -50 ° C or less.
- these liquids contain additives whose function is to prevent foaming and corrosion of the metals used for the manufacture of engines and with which they are in contact.
- Ethylene glycol oxidizes, transforming into actively corrosive acids, in particular oxalic acid, formic acid and unsaturated compounds which form insoluble deposits.
- a coolant has also been developed comprising potassium acetate as the main ingredient. The freezing temperature of this coolant is in the range of that of ethylene glycol coolants.
- glycol-based coolants in particular those set out below.
- Potassium acetate is a non-toxic, non-flammable product, which is environmentally friendly and has an unlimited useful life.
- thermophysical properties of a potassium acetate-based coolant are 10 to 15% higher than those of ethylene glycol-based coolants. When frozen, the potassium acetate solution turns into a kind of syrup and not a solid mass, as is the case with ethylene glycol-based coolants.
- potassium acetate-based coolants are not used frequently, due to alkaline reactions resulting in corrosion of the aluminum, copper and cast iron present in the engines.
- antipyrine used to reduce corrosion of ferrous metals, causes that of copper and brass by forming with them complex compounds of the water-soluble ammonia type.
- the potassium hydroxide used to reduce corrosion of aluminum and the boric acid used to reduce general corrosion in the engine do not appear to be sufficiently effective. and do not improve the qualities of the coolant as an antifreeze.
- the object of the invention is to respond in large part to the drawbacks set out above, by proposing a coolant having improved properties and having a limited corrosive effect.
- the coolant in particular for internal combustion engines, with a limited corrosive effect according to the invention comprises, as main ingredient, potassium acetate. It is characterized in that it also contains quinisarin.
- quinisarin (1,4-dihydroxy-9,10-anthracenedione) has anticorrosive properties hitherto unknown, with respect to copper, aluminum, iron , lead and tin.
- quinisarin forms a very resistant protective layer on the surface of the metals indicated above, thanks to chemisorption properties.
- the coolant according to the invention further comprises anti-corrosion additives, in particular sodium tetraborate (borax), sodium hexametaphosphate, and potassium silicate.
- anti-corrosion additives in particular sodium tetraborate (borax), sodium hexametaphosphate, and potassium silicate.
- the potassium silicate used is a potassium polyorganosilicate.
- the potassium polyorganosilicate allows the reduction of the corrosion of the aluminum and of the solders encountered in the motors, of the order of 80 to 90%.
- sodium tetraborate promotes the reduction of general corrosion of the engine, and lowers the freezing temperature of the coolant according to the invention by an additional 5 ° C.
- sodium hexa etaphosphate makes it possible to reduce the corrosion of copper and ferrous metals, of the order of 70 to 90% compared to the potassium acetate-based coolants used up to now.
- the four additives used in the coolant according to the present invention have a synergistic action.
- the potassium acetate-based coolant is characterized in that it comprises, expressed as percentages relative to the total weight, potassium acetate, in a range varying between about 35% and about 50%, of sodium tetraborate, in a range varying between approximately 0.2% and approximately 1.5%, of sodium hexametaphosphate, in a range varying between approximately 0.2% and approximately 0.8%, of potassium polyorganosilicate, in a range varying between approximately 0.1% and approximately 0.2% of quinisarin, in a range varying between approximately 0.1% and approximately 0.3%, and l water, up to 100%.
- the coolant according to the invention comprises, expressed in percentages relative to the total weight:
- the coolant according to the invention has the advantage of causing no pollution, due to its composition of non-toxic salts of organic and inorganic acids.
- the coolant according to the invention does not oxidize and it is not necessary to replace it after long periods of use.
- the coolant according to the invention is, moreover, non-flammable and non-explosive.
- the volume expansion coefficient of the coolant according to the invention is also approximately three times lower than that of ethylene glycol-based coolants. This advantage of the invention allows the use of reduced size expansion vessels in internal combustion engines, or even the elimination of said expansion vessels.
- the cost price of the coolant according to the invention is lower than that of ethylene glycol-based coolants, by about 30%.
- the coolant according to the invention can be used in internal combustion engines, such as the engines of motor vehicles, airplanes or boats.
- It can also be used in industrial machines and / or motors used in factories.
- a subject of the invention is also the use as an anti-corrosion agent with regard to metals such as copper, aluminum, iron, lead and tin of quinisarin.
- quinizarin can be used as the main ingredient of an anticorrosive composition with respect to the metals indicated above, or as a complementary ingredient in a general anticorrosive composition.
- Example 1 Coolant intended for regions in which temperatures do not generally drop below -20 ° C:
- 0.1 kg of quinisarin, 0.1 kg of potassium polyorganosilicate, 0.2 kg of sodium hexametaphosphate, 0.2 kg of borax and 35 kg of anhydrous potassium acetate are mixed one after the other in 64.4 kgs of distilled water.
- the coolant thus obtained has the following properties:
- Freezing temperature -28 ° C
- Corrosion rate of ferrous and non-ferrous metals 0.2 g / m per day (conforms to Canadian standard CAN2-3.890-M83, to American standard SAE-J- 814C-78 , to the Russian standard OCT280B4-88).
- Example 2 Coolant intended for regions in which temperatures drop to -40 "C or -45 ° C: In the same way as in Example 1 above, 0.1 kg of quinisarin, 0, 15 kg of potassium polyorganosilicate, 0.3 kg of sodium hexametaphosphate, 0.6 kg of borax, 43 kgs anhydrous potassium acetate are mixed one after the other in 56.1 kgs of distilled water.
- the dilution is carried out as in Example 1 above.
- the coolant thus obtained has the following properties:
- the dilution is carried out in the same way as in Example 1 above.
- the coolant thus obtained has the following properties:
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU914955196A RU2001292C1 (ru) | 1991-06-14 | 1991-06-14 | Антифриз системы охлаждени двигател внутреннего сгорани |
| PCT/RU1993/001000 WO1995008053A2 (fr) | 1991-06-14 | 1993-09-08 | Liquide de refroidissement a effet corrosif limite pour moteur a combustion interne |
| AU49877/93A AU4987793A (en) | 1991-06-14 | 1993-09-08 | Low-corrosion liquid coolant for use in internal combustion engines |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU914955196A RU2001292C1 (ru) | 1991-06-14 | 1991-06-14 | Антифриз системы охлаждени двигател внутреннего сгорани |
| PCT/RU1993/001000 WO1995008053A2 (fr) | 1991-06-14 | 1993-09-08 | Liquide de refroidissement a effet corrosif limite pour moteur a combustion interne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1995008053A2 true WO1995008053A2 (fr) | 1995-03-23 |
| WO1995008053A3 WO1995008053A3 (fr) | 1996-02-15 |
Family
ID=26653644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU1993/001000 Ceased WO1995008053A2 (fr) | 1991-06-14 | 1993-09-08 | Liquide de refroidissement a effet corrosif limite pour moteur a combustion interne |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1995008053A2 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4426309A (en) * | 1981-07-06 | 1984-01-17 | Northern Petrochemical Company | Antifreeze corrosion inhibitor composition for aluminum engines |
| CA1203973A (fr) * | 1982-03-31 | 1986-05-06 | Thomas R. Cassin | Composition anti-gel a base d'un copolymere d'organosiloxane-silicate, renfermant un nitrate, agent anti-corrosion |
| EP0245557B1 (fr) * | 1986-02-28 | 1991-03-06 | Texaco Development Corporation | Composition stabilisée d'antigel et de refroidissement contenant des inhibiteurs de corrosion à base de borate et de silicate |
| HU203778B (en) * | 1987-09-10 | 1991-09-30 | Peter Kardos | Glycol-free anti-freeze solution |
-
1993
- 1993-09-08 WO PCT/RU1993/001000 patent/WO1995008053A2/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995008053A3 (fr) | 1996-02-15 |
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