Pickling solution for stability of rust layer of bare steel

A technology of pickling liquid and rust layer, which is applied in the direction of metal material coating process, etc., can solve the problems of bare steel rust layer and rust liquid sag, and achieve the effects of avoiding excessive corrosion of workpieces, improving product quality, and reducing acid mist

Inactive Publication Date: 2015-07-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of pickling solution for stabilizing the rust layer of bare steel, which can effectively solve the problems of stabilizing the rust layer of bare steel and hanging rust solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of pickling liquid used for stabilizing the rust layer of bare steel, its components are by weight percentage, HCl accounts for 18%, H 3 PO 4 1%, HNO 3 0.5%, thiourea 10%, hexamethylenetetramine 0.1%, carboxy cellulose salt 0.1%, water 70.3%.

Embodiment 2

[0014] A kind of pickling solution used for stabilizing the rust layer of bare steel, its components are by weight percentage, HCl accounts for 2%, H 3 PO 4 10%, HNO 3 5%, thiourea 1%, hexamethylenetetramine 5%, carboxy cellulose salt 5%, water 72%.

Embodiment 3

[0016] A kind of pickling liquid used for stabilizing the rust layer of bare steel, its components are by weight percentage, HCl accounts for 5%, H 3 PO 4 8%, HNO 3 4%, thiourea 8%, hexamethylenetetramine 0.5%, carboxycellulose 3%, water 71.5%.

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PUM

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Abstract

The invention discloses pickling solution for stability of a rust layer of bare steel. The pickling solution comprises the following components in percentage by weight: 2 to 18 percent of HCl, 1 to 10 percent of H3PO4, 0.5 to 5 percent of HNO3, 1 to 10 percent of thiourea, 0.1 to 5 percent of hexamethylenetetramine, 0.1 to 5 percent of carboxyl cellulose salt and the balance of water. The pickling solution can be used for directly pickling a hot rolled plate in a range of 60 to 90 DEG C; a small quantity of acid mist is generated under the high temperature condition; the over etching and hydrogen embrittlement phenomena of a workpiece also can be avoided; product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of metal protection, and specifically refers to a pickling liquid used for stabilizing the rust layer of bare steel. Background technique [0002] Metal corrosion is a failure process of metals under the action of environmental corrosive media. It is a completely spontaneous and inevitable natural phenomenon, and it is the reverse process of metallurgical production. Atmospheric corrosion is an important cause of early failure and destruction of products, equipment, devices, and structural parts. The annual economic loss caused by atmospheric corrosion is extremely alarming. In the atmospheric natural environment, the formation of a stable protective rust layer on bare steel is a gradual process, which takes a long time, at least 3 years, and some bare steel surfaces form a dense and stable rust layer for more than 10 years. In the process of forming a stable rust layer, the phenomenon of early rust liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08C23C22/07
Inventor 黄先球庞涛程鹏郎丰军马颖何锐刘建容王辉李安平姜涛
Owner 武汉钢铁有限公司
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