Neutral environment-friendly rust remover and preparation method thereof

Abstract

The invention discloses a neutral environment-friendly rust remover and a preparation method thereof. The neutral environment-friendly rust remover is prepared from the following raw materials in percentage by mass according to a standard that the total mass of the rust remover is 100 percent: 10 to 15 percent of organic acid, 3 to 6 percent of a chelating agent, 2 to 4 percent of a corrosion inhibitor, 0.5 to 1 percent of a penetrating agent, 5 to 20 percent of a pH adjuster and the balance of water. According to the neutral environment-friendly rust remover disclosed by the invention, by adoption of combination of the organic acid, the chelating agent, the corrosion inhibitor, the penetrating agent and the like, the obtained rust remover is neutral and does not contain phosphorus and heavy metals, and no acid mist escapes; the neutral environment-friendly rust remover cannot cause a hydrogen embrittlement phenomenon or an over etching phenomenon for equipment and workpieces; furthermore, the rust remover disclosed by the invention cannot pollute the environment and a water source, and a rust removing method is simple; the neutral environment-friendly rust remover can be used forremoving rusts and has a good anti-rust function.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment agents, in particular to a neutral environment-friendly rust remover and a preparation method thereof. Background technique [0002] In industrial cleaning and before steel coating, rust removal and rust prevention are required to carry out subsequent processes. At present, industrial rust removal generally has chemical and mechanical methods. [0003] Chemical method: The most widely used in industry is hydrochloric acid for rust removal, and then sodium nitrite for rust prevention. [0004] Mechanical method: Use mechanical and electrical equipment to grind, and then apply oil to prevent rust after grinding. [0005] However, the currently used rust removal methods have the following disadvantages: [0006] 1. Hydrochloric acid is a strong acid with a pungent taste. The hydrogen ions of the strong acid corrode equipment and workpieces, and cause hydrogen embrittlement. The disc...

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Problems solved by technology

[0006] 1. Hydrochloric acid is a strong acid with a pungent taste. Strong acid hydrogen ions corrode equipment and workpieces, and cause hydrogen embrittlement. The discharge of cleaning fluid after rust removal will also cause environmental pollution

[0007] 2. Sodium nitrite is a toxic substance. Sodium nitrite and human hemoglobin are oxidized to methemoglobin, which makes the blood lose its oxygen-carrying function and causes human tissue hypoxia, which is very harmful to the human body.

[0008] 3. Mechanical rust removal is labor-intensive, time-consuming, low in efficiency, poor in rust removal effect, has dead corners (there are corners that cannot be handled by the equipment), generates noise, and has heavy dust pollution

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