Vitamins carbon steel pickling inhibitor and application thereof

Abstract

The invention discloses a vitamins carbon steel pickling inhibitor used for preventing carbon steel and a product thereof from unnecessary corrosion and acid liquor consumption in the pickling process and application thereof. The inhibitor is one or a composite of vitamins organic compounds of vitamin B1 (chloride3-((4-amino-2-methyl-5-pyrimidyl) methyl) 5-(beta-ethoxyl-4-methyl) onium hydrochloride and vitamins B6 (2-methyl-3-hydroxy-4, 5-dihydroxymethyl pyridine hydrochloride). The application of the pickling inhibitor is shown as follows: a cleaning solution is a diluted hydrochloric acid or a dilute sulphuric acid, and the concentration of the cleaning solution is 0.10-1.0kmol / m<3>; the 0.010kg / m<3>-2.0kg / m<3> of cleaning solution is added; the temperature is controlled to be about 25 DEG C; the carbon steel or the product thereof to be cleaned is added and is immersed for 30min-4 hours. The product of the invention is used for surface cleaning of the carbon steel and the product thereof, can prevent the excessive erosion of metal and the excessive consumption of the acid liquor in the cleaning process and has the outstanding advantages of low use level, high efficiency and strong continuous action capacity.

Description

technical field [0001] The invention relates to a production technology of a corrosion inhibitor, in particular to a vitamin-based high-efficiency carbon steel pickling corrosion inhibitor for preventing unnecessary corrosion and acid liquid consumption of carbon steel and its products during the pickling process and the same application. 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 for surface cleaning to remove the oxide film or corrosion products on the surface. 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 the excessive consumption of metal or acid during the pickling process and prevent the occurrence of harmful corrosion, it is an economical and effective method to...

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