Water soluble rust inhibitor and preparation method thereof

Abstract

The invention discloses a water soluble rust inhibitor, comprising the following components in parts by weight: 6-10 parts of macromolecule organic rust inhibitor, 3-10 parts of inorganic rust inhibitor, 8-15 parts of emulsifier, 2-6 parts of glycerinum, 5-10 parts of film-forming agent, 8-15 parts of petroleum sodium sulfonate and 40-60 parts of water. According to the water soluble rust inhibitor disclosed by the invention, a substance which can be dissolved into water at normal temperature and can form a film when meeting with black metal and organic and inorganic antirust components which have good anti-rust performance and can be combined with the film-forming agent are selected, so that an antirust protection film which is not dissolved into cold water is combined and formed by bridging action of the emulsifier, and the water soluble rust inhibitor is long in antirust time, thin and compact in formed film, convenient for film removal, and good in environmental protection property, can save a lot of cleaning materials and labor charges, and does not cause pollution to the environment.

Description

technical field [0001] The invention relates to the field of chemical cleaning agents, in particular to a water-soluble rust inhibitor for ferrous metal surfaces and a preparation method thereof. Background technique [0002] Ferrous metals refer to iron, manganese, chromium and their alloys, such as steel, pig iron, ferroalloy, cast iron and other ferrous metals after cleaning, in order to prevent surface rust, it is necessary to carry out anti-rust treatment, such as applying anti-rust agent on the surface. In the prior art, anti-rust oil with better anti-rust effect was used earlier, and a protective oil film was formed on the metal surface through the anti-rust oil to isolate the corrosion of the metal by water vapor in the air, thereby achieving long-term anti-rust. However, the use of anti-rust oil not only consumes a large amount of oil raw materials, which increases energy consumption, but also requires further cleaning during subsequent processing, which not only pr...

AI Technical Summary

Problems solved by technology

However, the use of anti-rust oil not only consumes a large amount of oil raw materials, which intensifies energy consumption, but also requires further cleaning during subsequent processing, which not only produces a large amount of waste liquid discharge, but also causes environmental pollution, and the second phase of cleaning and degreasing costs Time-consuming and cost-intensive, therefore, there is an urgent need for a water-soluble rust inhibitor

The water-soluble antirust agent described in Chinese patent CN1200386 contains carcinogenic nitrite substances, and its COD is extremely high, so its use is prohibited at home and abroad

The water-based cold-rolled lubricating antirust agent disclosed in Chinese patent CN1042375 basically adopts strong alkaline substances, which not only have extremely strong corrosiveness to the human body, but also cannot form a moisture-proof anti-corrosion agent on the metal surface like anti-rust oil. Rust protection film, the moisture in the air is still easy to seep to the metal surface to cause corrosion, so the anti-rust time is not long

The water-soluble antirust agent disclosed in Chinese patent CN1084534 also does not form a closed protective film on the metal surface, so the antirust effect is still limited, and the concentration is ≥ 10%, and the antirust is only 1-2 months

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