Rust-removing oil-removing wax-removing additive and preparation method thereof

Abstract

The invention discloses a rust-removing oil-removing wax-removing additive and a preparation method thereof, and aims to solves the environmental pollution problem that the prior hydrochloric acid or sulfuric acid pickle generates a large amount of acid mist when cleaning corrosion and oxide scale on the surface of metal and generates a large amount of phosphor and COD when removing oil and wax. The additive comprises the following raw materials by weight: 10%-20% of modified oleic acid, 3%-13% of alkyl polyglucoside, 3%-13% of coconut oil fatty acid diethanol amide, 1%-10% of 65% ethanol, 2%-7% of tetraacetylethylenediamine and balance of water. The preparation method of the additive includes steps of dissolving the modified oleic acid by the ethanol, and uniformly mixing the ethanol solution, the alkyl polyglucoside, the coconut oil fatty acid diethanol amide, the tetraacetylethylenediamine and water. The additive can be used for removing rust, oil and wax on surface of metal.

Description

technical field [0001] The invention relates to a pickling solution, in particular to an oil-removing and rust-removing pickling additive added to a hydrochloric acid pickling solution and a preparation method thereof. Background technique [0002] Pickling is one of the important processes in the surface treatment process, through which the scale and rust on the metal surface can be removed. At present, most manufacturers mainly use industrial hydrochloric acid or industrial sulfuric acid to remove rust and scale before surface treatment, and when using industrial hydrochloric acid or industrial sulfuric acid, a large amount of acid mist is generated, which not only seriously pollutes the environment, but also affects the operators. The health of the workpiece, and the corrosion of various equipment is also very serious. During the operation, a little carelessness will cause over-corrosion of the workpiece, resulting in decarburization and embrittlement, which affects the q...

AI Technical Summary

Problems solved by technology

At present, most manufacturers mainly use industrial hydrochloric acid or industrial sulfuric acid to remove rust and scale before surface treatment, and when using industrial hydrochloric acid or industrial sulfuric acid, a large amount of acid mist is generated, which not only seriously pollutes the environment, but also affects the operators. The health of the workpiece, and the corrosion of various equipment is also very serious. During the operation, a little carelessness will cause over-corrosion of the workpiece, resulting in decarburization and embrittlement, which affects the quality of the product and the subsequent process

[0003] At present, the method of degreasing mainly adopts alkali washing, and the additive in the alkali washing liquid contains phosphorus, and the COD of the additive is very high, which has serious pollution to the environment, and the process is complicated; currently, the wax removal mainly uses wax removal water, of which The COD of additives is very high, which exceeds the national standard by hundreds of times, seriously pollutes the environment, and can only be carried out under high temperature conditions.

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