High-temperature compound corrosion inhibitor and preparation method thereof

Abstract

The invention discloses a high-temperature compound corrosion inhibitor and a preparation method thereof. The high-temperature compound corrosion inhibitor comprises the following components in percentage by weight: 34-40% of tributyl phosphite, 8-15% of phosphate, 5-10% of isopropyl alcohol, 5-10% of thiourea, 1-5% of phenylamine, 4-8% of acetophenone, 0.5-3% of polysiloxane and the balance of water. According to the high-temperature compound corrosion inhibitor, tributyl phosphite and phosphate are taken as raw materials, the raw materials are synergistic, the stability of an adsorption layer is improved, and the working concentration of the corrosion inhibitor is reduced; and the high-temperature compound corrosion inhibitor prepared by the invention has better corrosion resistance under the conditions of high temperature and high pressure and has significance in reduction of loss of equipment and pipelines and increase of comprehensive economic benefit.

Description

technical field [0001] The invention relates to a high-temperature composite corrosion inhibitor. Background technique [0002] Corrosion is often an extremely important destructive factor in modern industry and life. It brings huge economic losses and social harm to human beings. Due to sudden corrosion fractures, accidents of planes, trains, ships, and chemical equipment damage or There are reports of explosions, and the leakage of pollutants often causes serious environmental pollution. The use of corrosion inhibitors is a commonly used anti-corrosion measure. When added to a corrosive environment, it can have physical and chemical interactions with the metal surface, thereby significantly reducing the corrosion of metal materials. The use of corrosion inhibitors does not require special equipment or changes in metal components. nature. [0003] However, at present, most of the high-temperature corrosion inhibitors are composed of sulfurous acid, phosphate or phosphate ...

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Problems solved by technology

[0003] However, at present, most of the high-temperature corrosion inhibitors are composed of sulfurous acid, phosphate or phosphate ester, which are easy to make, but the addition amount is relatively large. It is difficult for petrochemical enterprises to achieve a balance between reducing processing costs and achieving satisfactory high-temperature anti-corrosion effects