Alkaline steel rust remover and preparation method thereof

Abstract

The invention discloses an alkaline steel rust remover and a preparation method thereof. The alkaline steel rust remover is prepared from the following components of, in percentage by mass, 0.1%-8% ofan alkali agent, 0.01%-5% of a complexing agent, 0.01%-3% of a corrosion inhibitor, 0.1%-3% of an emulsifier, 0.01%-0.05% of a defoaming agent, 0.02%-1% of a thickening agent and the balance water. The preparation method of the alkaline steel rust remover is very simple, and the components are mixed uniformly in batches; and the rust removal effect of the alkaline steel rust remover is good, steel is not corroded, acid mist is not generated, the hydrogen embrittlement phenomenon does not occur, the production process is simple, and safety and environmental protection are achieved.

Description

technical field [0001] The invention relates to an alkaline iron and steel derusting agent and a preparation method thereof, belonging to the technical field of metal surface treatment. Background technique [0002] Steel products widely used in all walks of life are easily rusted in the atmospheric environment, which will affect their performance and bring huge losses to enterprises and society. Therefore, it is very necessary to carry out rust removal and anticorrosion treatment on the surface of steel products. Rust removal is the basic process of anticorrosion of steel products, which will directly affect the subsequent passivation antirust effect. [0003] At present, the commonly used rust removal methods mainly include mechanical and chemical methods. The mechanical method is to grind and remove rust through electromechanical equipment, which not only has poor rust removal effect and has dead corners (such as corners and depressions of steel products), but also has ...

AI Technical Summary

Problems solved by technology

The mechanical method is to grind and remove rust through electromechanical equipment. Not only the rust removal effect is poor, there are dead corners (such as corners and depressions of steel products), but also the noise is loud and the dust pollution is serious

The chemical method is to remove rust through pickling operation. Although the rust removal effect is good, the sulfuric acid, hydrochloric acid and nitric acid used are highly corrosive. The health of the workers, in addition, there is a potential danger of "hydrogen embrittlement"

Scholars at home and abroad try to solve various problems in the acid rust removal process by adding corrosion inhibitors and smoke inhibitors to the acid. Although it has certain effects, it still cannot fundamentally eliminate the corrosion and hydrogen embrittlement caused by the acid. , acid mist and other issues

It can be seen that traditional rust removers can no longer meet the needs of sustainable development of the steel industry, and it is imperative to develop new and efficient rust removers

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