Environmentally-friendly steel oil and rust removing solution at normal temperature

Abstract

The invention relates to a preparation method of an environment-friendly steel oil and rust removing solution at normal temperature. The solution mainly comprises the following elements in percentage by weight: 82-94.5% of mixed inorganic aid solution, 4-8% of hydrofluoric acid, 0.3-3% of oxalic acid, 0.2-2% of mixed surfactant, 0.5-3% of lauryl sodium sulfate, and 0.5-2% of a compounded corrosion inhibitor. The oil and rust removing solution provided by the invention has the advantages that the preparation method is simple and the cost is low; the rust removal speed of the oil and rust removing solution is fast, the energy resource is saved, and the working efficiency is increased; the oil and rust removing solution is suitable for continuous use and does not need to discharge wastewater; the acid mist is effectively inhibited, the surface treatment quality is improved, and the rust removal effect is rather good. Therefore, the oil and rust removing solution can be widely applied to the field of steel washing.

Description

technical field [0001] The invention relates to a normal-temperature environment-friendly iron and steel degreasing and derusting liquid, which is mainly used for degreasing and derusting in the pre-coating process of metal materials such as iron and steel. The invention belongs to the technical field of chemical metal surface cleaning treatment. Background technique [0002] Before the steel materials are subjected to spraying, electroplating and other processes, the surface must be treated to remove the oxide scale generated on the surface during processing. At present, various effective oil and rust removal technologies have been widely used in industry. [0003] Chemical derusting, also known as pickling derusting, mainly uses the solution of acid and other chemical substances to react with the oxides on the surface to generate soluble or insoluble metal salts, so as to achieve the purpose of derusting. Although some current technologies overcome some of the shortcomin...

AI Technical Summary

Problems solved by technology

Although some current technologies overcome some of the shortcomings of the traditional degreasing and rust removal process, most of them have high cost and high energy consumption, and cannot really effectively solve the large amount of waste gas, waste water and waste residue generated in the pickling process.