A kind of neutral remover of high temperature scale and preparation method thereof

Abstract

The invention discloses a neutral remover for high-temperature scale and a preparation method thereof. The remover comprises 5-9 parts of acetylene alcohol, 9-12 parts of plant surface active dispersant, 10-18 parts of reducing agent, 17-34 parts of chelating agent, 2-3 parts of pH regulator, and the rest is deionized water. The aloe vera gel in the plant surface active dispersant needs to be peeled to prepare the extract. During the preparation, the basic order of adding the reducing agent and the solution with foaming effect is adopted to mix the components first, and the acid and alkali are added dropwise to adjust the pH to 6.5-7.5. The remover is neutral, which can completely replace sandblasting, strong acid pickling, etc. to remove black scale, and will not cause hydrogen permeation and excessive corrosion to the substrate, and maintain the original mechanical properties of the substrate; The synergistic effect of alcohol, plant surfactant, reducing agent and chelating agent has the effect of fast removal and thorough removal; the waste liquid of the remover of the present invention is environmentally friendly, does not cause health and safety hazards to operators during use, and can be effectively recovered Single metal powder.

Description

technical field [0001] The invention relates to the technical field of cleaning agents, in particular to a neutral remover of high-temperature scale and a preparation method thereof. Background technique [0002] In some military and civilian industries, a large number of high-quality substrates such as high-strength or super-strength steel are used. These substrates are mostly heat-treated at high temperatures to optimize their mechanical properties. However, a thick black oxide layer will be formed on the surface after heat treatment. When painting, it is difficult to remove, and this black oxide layer is more difficult to remove than ordinary oxidized rust. Traditionally, high-speed shot peening or pickling is mainly used. Shot peening has a great influence on the surface roughness, and the special-shaped corners cannot be sprayed, and the dust pollution in the workshop is large. Pickling is highly volatile, the equipment is highly corrosive, and it is harmful to the ope...

AI Technical Summary

Problems solved by technology

[0002] In some military and civilian industries, a large number of high-quality substrates such as high-strength or super-strength steel are used. These substrates are mostly heat-treated at high temperatures to optimize their mechanical properties. However, a thick black oxide layer will be formed on the surface after heat treatment. When painting, it is difficult to remove, and this black oxide layer is more difficult to remove than ordinary oxidized rust

Traditionally, high-speed shot peening or pickling is mainly used. Shot peening has a great influence on the surface roughness, and special-shaped corners cannot be sprayed, and the dust pollution in the workshop is large.

Pickling is highly volatile, the equipment is highly corrosive, and it is harmful to the operator. The base material loses a lot, especially the "hydrogen" seepage is serious, and the mechanical properties of the base material are reduced, which brings certain hidden dangers to the whole machine.

At present, the use of phosphoric acid alcohol corrosion solution to remove the black scale of high-strength steel is a compromise method. Compared with strong acids such as hydrochloric acid and sulfuric acid, the amount of "hydrogen permeation" to the base material is only relatively reduced within units, and there is no Completely eliminate the "hydrogen permeation" phenomenon in the corrosion process