Alcohol ether substitute fuel metal component corrosion inhibitor for vehicle and preparation method thereof

Abstract

The invention relates to an alcohol ether alternative fuel metal component corrosion inhibitor for a vehicle and a method for preparing the alcohol ether alternative fuel metal component corrosion inhibitor. The alcohol ether alternative fuel metal component corrosion inhibitor is obtained by the basic raw materials of aromatic carboxylic acid, unsaturated fattyacid, organic nitrogen-containing compounds, active anions and the like through synergism effect generated through compounding. Alcohol ether alternative fuel prepared by the adoption of the corrosion inhibitor has a good corrosion inhibiting effect, overcomes the defect that in the prior art, the protection effect is single, and the corrosion inhibition efficiency of carbon steel, copper and copper alloy is still higher than 95 % especially in the corrosion environment of formic acid generated in the alcohol ether fuel combustion simulation process. Compared with the prior art, the alcohol ether alternative fuel metal component corrosion inhibitor for the vehicle has the advantages of being low in consumption, low in manufacturing cost, good in corrosion resistant effect, simple in preparation technology, environmentally friendly, green, clean and the like, and can effectively prevent the engine metal component from being corroded by the alcohol ether alternative fuel.

Description

technical field [0001] The present invention relates to a composite corrosion inhibitor and its preparation method, in particular to a vehicle alcohol ether alternative fuel metal member corrosion inhibitor and its preparation method, more specifically refers to the addition of methanol, ethanol, propanol, butanol Alcohol and other alcohols after alcohol, gasoline, diesel and aviation kerosene and other alcohol ethers to replace the preparation method of corrosion inhibitors for fuel metal components. Background technique [0002] Since the energy crisis occurred in the 1970s, countries around the world have continuously increased their research and development investment in the search for clean, safe and reliable new energy. Researchers have found in their research that alcohol fuels, especially methanol and ethanol, are considered to be the most effective for engines because of their chemical and physical properties similar to gasoline, fast combustion rate, high oxygen co...

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Problems solved by technology

[0003] However, there are two main problems in the use of alcohol ether alternative fuels: 1. The phase separation problem. The water content in the denatured fuel alcohol must be strictly controlled to reduce the alcohol ether alternative fuels mixed with water or inhaled by oil during storage and transportation. Moisture; 2. Due to the existence of moisture in the alcohol ether alternative fuel, it will activate the acid corrosion and electrochemical corrosion of the metal. When the fuel does not contain moisture, the acid corrosion is very weak, mainly copper corrosion caused by active sulfide, When there is water in the alcohol ether alternative fuel, it will cause the ionization of the acid, which will intensify the acid corrosion of the active metal and activate other corrosion behaviors.

But the disadvantage is that potassium permanganate is easy to oxidize and decompose when it encounters methanol and ethanol; when it contacts or mixes with organic matter and reducing agents, it may cause combustion and explosion, which limits its use;

Although the patented metal corrosion inhibitors are effective against 45 # The corrosion inhibition rate of steel in M90, M85 and M70 test range can reach up to 97.6%, but the shortcoming is that it does not consider the factor of formic acid, the oxidation product produced during the combustion and storage of alcohol fuel, on the corrosion of metal components of vehicles ;

[0010] The Chinese patent "methanol gasoline additive and its preparation method and methanol gasoline" (CN101519610B) discloses that the anti-oxidation corrosion agent is at least one of amines and organic phenols, and only nickel-plated iron sheets are used in methanol gasoline with this anti-oxidation corrosion agent. Carry out constant temperature and constant humidity test, there is no visible corrosion phenomenon

However, no quantitative evaluation has been made on the performance of corrosion inhibitors

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