Steel rust removing liquid

A technology for derusting liquid and steel, which is applied in the field of derusting liquid for steel, which can solve the problems of steel weight loss, high energy consumption, and acid mist generation, and achieve the effects of good removal, inhibition of acid mist volatilization, and slowing down of steel corrosion

Inactive Publication Date: 2012-03-14
陈瑜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The treatment method for impurities such as rust and scale on the surface of steel is usually cleaned with heated sulfuric acid, hydrochloric acid or mixed acid at room temperature, but this method has many disadvantages, such as high energy consumption, hydrogen embrittlement to the base metal, and the steel Loss of weight, produce acid mist, etc.

Method used

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Examples

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with embodiment.

[0016] Mix and dissolve 1.8g oxalic acid, 1.5g triethanolamine, 2.4g phosphoric acid (85%), 51g hydrochloric acid (33%), 1.7g fatty alcohol polyoxyethylene ether and 1.6g hexamethylenetetramine in 40g water, stir well After that, the iron and steel derusting liquid can be obtained.

[0017] When in use, first soak the rusty steel in this derusting solution for about 10 minutes. After repeated use, the derusting effect will drop significantly, and the concentration of the derusting solution should be tested at this time. When the acid concentration of the liquid is lower than 14%, rust removal liquid should be added before continuing to use. If the derusting liquid is used for a long time, it should be simply filtered to ensure the cleanness of the derusting liquid.

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PUM

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Abstract

The invention provides a steel rust removing liquid which comprises the following components of oxalic acid, triethanolamine, phosphoric acid, hydrochloric acid, fatty alcohol-polyoxyethylene ether, hexamethylenetetramine and water. A buffering agent and an acid fog inhibiting agent are also added into the steel rust removing liquid provided by the invention besides using a few amount of organic acid. The steel rust removing liquid not only can well remove metal oxides, but also has the characteristics of retarding steel corrosion and inhibiting acid fog volatilization and the like.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a steel descaling solution. Background technique [0002] The treatment method for impurities such as rust and scale on the steel surface is usually cleaned with heated sulfuric acid, normal temperature hydrochloric acid or mixed acid, but this method has many disadvantages, such as high energy consumption, hydrogen embrittlement to the base metal, and the steel Loss of weight, produce acid mist, etc. Contents of the invention [0003] The invention overcomes the deficiencies in the prior art and provides a iron and steel derusting solution which can quickly derust at normal temperature without generating acid mist. [0004] In order to achieve the above purpose, the following technical solutions are adopted: [0005] A kind of iron and steel descaling liquid, the component of described descaling liquid and parts by weight are: [0006] Oxalic acid 1.8 [0007] Triethanolam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23G1/06
Inventor 陈瑜
Owner 陈瑜
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