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Chemical de-rusting liquid and preparation method thereof

A rust removal liquid and chemical technology, applied in the direction of metal material coating process, can solve the problems of poor construction conditions, high labor intensity, a large amount of acid mist, etc., and achieve the effects of low cost, reduced pollution, and good rust removal performance.

Inactive Publication Date: 2011-10-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a chemical descaling solution and its preparation method. The chemical descaling liquid is prepared from various functional materials, which overcomes the traditional pickling descaling agent with high labor intensity, high cost, and A large amount of acid mist, poor construction conditions and single function, etc., the rust removal solution of the present invention has good rust removal performance, low cost, environmental friendliness, simple construction technology, and has certain degreasing, phosphating and passivation effects

Method used

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  • Chemical de-rusting liquid and preparation method thereof
  • Chemical de-rusting liquid and preparation method thereof
  • Chemical de-rusting liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Get tannic acid, phosphoric acid and n-butanol according to the required raw material weight of table 1, under normal temperature and pressure, add tannic acid, phosphoric acid and n-butanol successively in reactor, add water to solution gross weight and be 100Kg, then Heat at 20°C for 30 minutes, and stir during the heating process to obtain a chemical descaling solution.

[0015] The raw material of table 1 embodiment 1

[0016]

Embodiment 2

[0018] Get tannic acid, phosphoric acid and ethanol according to the required raw material weight of table 2, under normal temperature and pressure, add tannic acid, phosphoric acid and ethanol successively in the stainless steel reactor, add water to solution gross weight and be 100Kg, then in 15 Heating at ℃ for 30 minutes, stirring during the heating process, to obtain a chemical descaling solution.

[0019] The raw material of table 2 embodiment 2

[0020]

Embodiment 3

[0022] Get tannic acid, phosphoric acid and isoamyl alcohol according to the required raw material weight in Table 3, under normal temperature and pressure, add tannic acid, phosphoric acid and isoamyl alcohol in the stainless steel reaction kettle successively, add water again until the total weight of the solution is 100Kg , and then heated at 35°C for 10 minutes, stirring during the heating process, to obtain a chemical rust removal solution.

[0023] The raw material of table 3 embodiment 3

[0024]

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Abstract

The invention discloses chemical de-rusting liquid, which is prepared from the following raw materials in percentage by weight: 10%-20% of gallotannic acid, 10%-15% of phosphoric acid, and 20-30% of alcohol, 40-60% of water. The sum of the raw materials in percentage by weight is 100%. The preparation method comprises the following steps of: weighing the raw materials in formula amounts; adding the gallotannic acid, the phosphoric acid, the alcohol and the water into a stainless steel reaction kettle in sequence at normal temperature and normal pressure; then, heating; controlling the temperature in the reaction kettle at 15-35 degrees centigrade; and stirring at low speed for 10-30 min to obtain the de-rusting agent. The chemical de-rusting liquid disclosed by the invention has the advantages of good de-rusting performance, low cost, environmental friendliness, simple construction process and multiple functions of phosphorization, passivation and the like. The quality of a de-rusted and cleaned surface can reach grade Sa 2.5, phosphorization and passivation are carried out on a metal surface simultaneously, and the chemical de-rusting liquid dose not generate acid mist and does not need heating in a use process and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of metal surface cleaning, and in particular relates to a rust removing liquid, in particular to a chemical rust removing liquid and a preparation method thereof. Background technique [0002] Rust removal or antirust treatment on metal surfaces is the basic process for metal products to prevent corrosion. Commonly used rust removal methods include manual rust removal, mechanical rust removal and chemical rust removal. Chemical rust removal mainly uses rust remover or rust remover liquid, and uses acid to react with metal oxides to dissolve the rust layer and remove the rust products on the metal surface, which is commonly referred to as pickling. rust removal. Compared with manual derusting and mechanical derusting, chemical derusting has the advantages of good effect, high efficiency, simple process operation, low cost, and is not limited by the shape and site of the workpiece. It is a widely used derusti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23C22/06
Inventor 关卫省李宇亮鲁琛琛
Owner CHANGAN UNIV
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