Antibiotic carbon steel pickling corrosion inhibitor and application thereof

Abstract

The invention discloses a carbon steel pickling corrosion inhibitor and application thereof. The carbon steel pickling corrosion inhibitor is used for preventing unnecessary corrosion and acid liquid consumption in a pickling process of carbon steel and products thereof. The corrosion inhibitor is one or a combination of antibiotic organic compounds such as ceftriaxone and amoxicillin. The application of the carbon steel pickling corrosion inhibitor comprises the following steps of: adding a 0.010 to 2.0 kg / m<3> cleaning agent into 0.10 to 1.0 kmol / m<3> dilute hydrochloric acid or dilute sulphuric acid serving as cleaning liquid; controlling the temperature to be about 25 DEG C; adding the carbon steel and the products thereof to be cleaned; and immersing for 30 minutes to 4 hours. The product of the invention is used for cleaning the surfaces of the carbon steel and the products thereof, can prevent the excessive corrosion of metals and the excessive consumption of acid liquid in a cleaning process, and has the outstanding advantages of low dosage, high efficiency and good continuous effect.

Description

technical field [0001] The present invention relates to the production technology of corrosion inhibitor, specifically an environment-friendly antibiotic-type high-efficiency carbon steel acid pickling corrosion inhibitor used to prevent carbon steel and its products from unnecessary corrosion and acid consumption in the pickling process agents and their applications. Background technique [0002] Steel is used more and more widely. In the process of product processing and application, dilute sulfuric acid or dilute hydrochloric acid is often used to clean the surface to remove the oxide film or corrosion products on the surface. Since strong acid has a corrosive effect on metal equipment, it is often used in the pickling process. The phenomenon of "over-corrosion" occurs. This process will not only cause corrosion of metal materials, but also produce a large amount of acid, which will cause serious damage to the environment. In order to avoid excessive consumption of metal...

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used cleaning agents mainly include toxic inorganic corrosion inhibitors such as chromate, nitrate, and nitrite, as well as some organic phosphorus corrosion inhibitors, whose discharge may cause eutrophication of water bodies. Most cleaning agents have toxic and side effects, do not have market competitiveness, and do not meet the worldwide environmental protection requirements