Metal surface cleaning solution

Abstract

The invention relates to a metal surface cleaning solution which is prepared by following raw materials of, by weight percentage, sulfuric acid, hydrochloric acid, a high polymer composite enhanced active agent, sodium dodecyl benzene sulfonate, urotropin, sodium silicate, citric acid, urea, industrial salt, triethanolamine and water. The cleaning solution can completely clean up various greasy dirt, rust and scale cinder attached on a metal surface effectively, and protective film can forms on the metal surface after being cleaned so as to prevent metal from rusting and oxidizing in a certain period. Waste water of a used cleaning solution can be reused after being recovered, precipitated and filtered.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and relates to a metal surface cleaning solution for pretreating the surface of metal materials and metal products. Background technique [0002] Degreasing and derusting process occupies an important position in metal surface treatment. With the development of modern industry, the application of advanced coating technology and the needs of environmental protection and energy saving, it is increasingly required to overcome the cumbersome and long process of conventional alkali cleaning, degreasing, pickling and derusting processes. , high cost, high energy consumption, heavy pollution and large investment, poor working conditions and other shortcomings. In the prior art, for the degreasing and derusting of the surface of metal materials and metal products, the traditional method is to scrape with a knife or brush with a metal brush. The derusting is not complete, the labor intensi...

AI Technical Summary

Problems solved by technology

[0002]Oil removal and rust removal process plays an important role in metal surface treatment. Overcome the disadvantages of conventional alkali cleaning, oil removal, pickling and rust removal, which are cumbersome, long process, high cost, high energy consumption, heavy pollution, large investment, and poor working conditions

In the prior art, for the degreasing and derusting of the surface of metal materials and metal products, the traditional method is to scrape with a knife or brush with a metal brush, the derusting is not complete, the labor intensity is high, and it requires a lot of manpower and the efficiency is low , especially the rust dust caused by rust removal is flying everywhere, polluting the surrounding environment

This method is only suitable for the pretreatment of metal surfaces with less serious oil stains and rust spots, but it is difficult to remove a large amount of oil stains and rust spots on the metal surface

However, the conventional method of alkali cleaning, oil removal, pickling and rust removal needs to build two operation pools. The existing problems are: (1) the occupied space is large, the cleaning is troublesome, the speed is slow, and the efficiency is low; (2) when cleaning, it must Be careful, because the use of strong alkali and strong acid is harmful to the human body and there are hidden dangers of unsafety

(3) The use of high-strength pickling has a sour taste of harmful toxins, which has a strong sense of stimulation to the human body, and the acid mist produced seriously pollutes the air; (4) The discharge of waste acid water seriously pollutes water resources, affecting and destroying water resources. sustainable development of resources

(5) The metal surface after high-concentration pickling can produce secondary oxidation corrosion after staying in the atmosphere for 3 minutes, so it can only play a temporary corrosion inhibition effect

At present, there are many kinds of chemical degreasing and derusting agents for metal materials at home and abroad, which play an active role in overcoming the above shortcomings, but at the same time produce poor degreasing effect, slow derusting speed, and unstable treatment quality. Defects such as light oil stains and rust that are not too serious for oil stains and rust spots