Hot rolled plate hydrochloric acid pickling corrosion inhibition accelerator

Abstract

The invention provides a hot rolled plate hydrochloric acid pickling corrosion inhibition accelerator in which the compositions and weight percentages thereof are as follows: the weight percentage of surface active agent TX-10 that is octyl phenol polyethylene glycol (10) ether is 5% to 10%, the weight percentage of carboxylic cellulose salt is 5% to 10%, and the weight percentage of stannous salt reducing agent is 80% to 90%; the weight percentage of surface active agent TX-10 that is octyl phenol polyethylene glycol (10) ether is 5% to 10%, the weight percentage of carboxylic cellulose salt is 5% to 10%, and the weight percentage of stannous salt reducing agent is 85% to 90%. The composition weight percentage concentration range of corrosion inhibition accelerator in pickling working fluid keeps between 0.5% and 1%. The hot rolled plate hydrochloric acid pickling corrosion inhibition accelerator in the invention has not only good corrosion inhibition performance but also good acceleration performance, and still has good corrosion inhibition and acceleration performances within a certain range of pickling temperature and hydrochloric acid concentration.

Description

technical field [0001] The invention relates to a hydrochloric acid pickling corrosion inhibitor for hot-rolled plates. The invention belongs to the technical field of electrochemical and chemical method metal cleaning. Background technique [0002] Hydrochloric acid has a strong ability to remove iron scale from hot-rolled plates, and the dissolution rate of iron salt is high. There are very few powdery precipitates in the hydrochloric acid pickling solution. The surface condition after pickling is good, and the effect of hydrogen permeation is small. During the hydrochloric acid pickling process of the hot-rolled plate, it can be seen that a large number of air bubbles emerge from the surface of the steel plate, and at the same time, the oxide scale peels off. A large number of air bubbles are hydrogen released from the acid corrosion of the iron base. The base is also more serious. With the expansion of the scale of iron and steel enterprises, it is more and more requir...

AI Technical Summary

Problems solved by technology

In recent years, the annual output of new acid rolling mills and reformed original acid rolling mills in China has reached more than one million tons, and the newly installed continuous acid rolling mills and technically improved continuous acid rolling mills all have technological incompatibility. The key points are The pickling speed and board surface quality cannot meet the demand

For example, the quality of some pickling low-carbon steel plates is good, but the surface quality of pickling high-carbon steel and special steel is poor, the substrate is severely corroded, and the speed is extremely low; Spots; some pickling turbulent flow system processes have negative effects, etc.