Novel water soluble metal pickling corrosion inhibitor and application thereof

A corrosion inhibitor, water-soluble technology, applied in the field of new water-soluble metal pickling corrosion inhibitor, can solve the problem of lack of pickling solution, and achieve the effect of small corrosion inhibition effect, low synthesis cost, and inhibiting excessive corrosion.

Inactive Publication Date: 2016-07-13
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the problems existing in the above-mentioned prior art, that is, the requirements for various aspects of metal pickling corrosion inhibitors are increasing day by day, and the pickling solution that can meet this requirement is still relatively scarce at present, and provides a water-soluble A new type of water-soluble metal pickling corrosion inhibitor with good sex, low cost, high efficiency, stable performance and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The pickling solution is hydrochloric acid, the concentration is 1mol / L, the amount of pickling solution is 5L, add 50mg of O, O'-bis(benzyl)dithiophosphoric acid-N-ethanolammonium, and put the to-be-cleaned Q235 steel is immersed in pickling solution for 24h. The test results show that its corrosion inhibition efficiency is 86.3%, and the corrosion inhibitor is an efficient pickling corrosion inhibitor.

Embodiment 2

[0029] The pickling solution is hydrochloric acid, the concentration is 1mol / L, the amount of pickling solution is 5L, add 250mg of O,O'-bis(benzyl)dithiophosphoric acid-N-ethanolammonium, and put the to-be-cleaned Q235 steel is immersed in pickling solution for 24h. The test results show that its corrosion inhibition efficiency is 96.4%, and the corrosion inhibitor is an efficient pickling corrosion inhibitor.

Embodiment 3

[0031] The pickling solution is hydrochloric acid, the concentration is 1mol / L, the amount of pickling solution is 5L, add 500mg of O,O'-bis(benzyl)dithiophosphoric acid-N-ethanolammonium, and put the to-be-cleaned Q235 steel is immersed in pickling solution for 24h. The test results show that its corrosion inhibition efficiency is 97.9%, and the corrosion inhibitor is an efficient pickling corrosion inhibitor.

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PUM

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Abstract

The invention relates to the technical field of metal pickling corrosion and prevention, in particular to a novel water soluble metal pickling corrosion inhibitor and application thereof. The corrosion inhibitor comprises water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds, namely, O,O'-bis(phenyl)phosphorodithioic-N-ammonium ethanol, O,O'-bis(phenyl)phosphorodithioic-N,N-diethanol amine, O,O'-bis(phenyl)phosphorodithioic-N,N,N-triethanolamine, O,O'-bis(4-tolyl)phosphorodithioic-N-ammonium ethanol, O,O'-bis(4-tolyl)phosphorodithioic-N-N-diethanol amine and the like. The corrosion inhibitor provided by the invention comprises the water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds; the water soluble O,O'-bis(substituent)phosphorodithioic ammonium ethanol compounds form an ionic type organic corrosion inhibitor which contains one or more hydrophilic hydroxyl groups; compared with other corrosion inhibitors, the novel water soluble metal pickling corrosion inhibitor is high in water solubility, and does not have the problem of precipitation in an acidic solution.

Description

technical field [0001] The invention relates to the technical field of metal pickling corrosion and protection, in particular to a novel water-soluble metal pickling corrosion inhibitor and application thereof. Background technique [0002] Metal materials are the most widely used engineering materials in modern society, and they play an irreplaceable role in the progress of human civilization, social development, scientific and technological progress, and national defense security. Although metal materials play an extremely important role in various fields of the national economy, their corrosion problems also seriously affect the development of the national economy when metal materials are widely used, from daily life to production practice, from cutting-edge science and technology to national defense In industry, wherever metal materials are used, there are corrosion problems of metal materials to varying degrees. Corrosion of metal materials not only brings huge economi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
CPCC23G1/066
Inventor 谢斌赖川何林芯邹立科李玉龙冯建申陈炯
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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