Broad-spectrum and efficient cleaning agent for cooling system

Abstract

The invention discloses a broad-spectrum and efficient cleaning agent for a cooling system, comprising the following components in percentage by weight: 1-5% of organic acid, 0.5-3% of metallic ion chelating agent, 0.5-2% of cleansing promotion agent, 0.1-1% of corrosion and scale inhibition dispersing agent, 0.3-5% of degreasing agent and the balance of water. The cleaning agent of the invention has safe use, the cleaning time is 1-2h, and the descaling rate is more than 90%, thereby greatly reducing corrosion and damage on the cooling system.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a broad-spectrum high-efficiency cooling system cleaning agent suitable for various kinds of dirt. Background technique [0002] At present, there are two main cooling media used in the water cooling system of automobile engines in my country: one is water and the other is coolant. As a cooling medium, water has good thermal conductivity and heat absorption, so water is widely used as a traditional excellent cooling medium, but water has many disadvantages as a cooling medium: the freezing point of water is high, and it begins to freeze below 0 °C. Ice and volume expansion, when the engine is not used for a long time, the water tank may freeze or even crack at low temperature; secondly, because the water used is usually natural water or tap water, these waters contain various inorganic ions, the common ones are Mg 2+ , Ca 2+ , SO 4 2- and Cl - Plasma, when the water temperat...

AI Technical Summary

Problems solved by technology

As a cooling medium, water has good thermal conductivity and heat absorption, so water is widely used as a traditional excellent cooling medium, but water has many disadvantages as a cooling medium: the freezing point of water is high, and it begins to freeze below 0 °C. Ice and volume expansion, when the engine is not used for a long time, the water tank may freeze or even crack at low temperature; secondly, because the water used is usually natural water or tap water, these waters contain various inorganic ions, the common ones are Mg 2+ , Ca 2+ , SO 4 2- and Cl - Plasma, when the water temperature rises, these impurities are very easy to generate calcium salts and magnesium salts, which adhere to the inner surface of the metal water channel to form scale

Some of these cleaning agent solutions contain highly acidic inorganic acids, although some are mainly organic acids, but the amount of organic acids is large, and the principle is to achieve the purpose of descaling at a low pH value (pH<2). In actual use, this kind of cleaning agent is likely to cause excessive corrosion of cooling system equipment; in addition, this type of cleaning agent is too acidic and will cause swelling of plastic hoses and rubber gaskets in the cooling system, so there are potential safety hazards for equipment

Although the water tank descaling and antirust agent method provided by Chinese patent 01110576.3 is novel, the descaling time is generally 20 to 30 days, which is not convenient and fast, and is difficult to popularize and use

There is also a common problem in all these cleaning agents, which is the narrow range of scales, mainly to remove calcium, magnesium salt scales, metal scales and oil scales, while ignoring the problem of cleaning silica gel scales that appear in cooling systems that use antifreeze

Images