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A kind of cucurbit compound type hydrochloric acid pickling corrosion inhibitor

A pickling corrosion inhibitor and composite technology, applied in the field of metal pickling corrosion inhibitor, can solve the problems of unstable corrosion inhibitor, low corrosion inhibition rate and high price, and achieve low acid mist and high corrosion inhibition efficiency. , the effect of low production cost

Active Publication Date: 2018-12-07
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to develop a new type of corrosion inhibitor for the problems of large dosage, toxicity, instability of corrosion inhibitor, low corrosion inhibition rate and high price in existing pickling corrosion inhibitors.

Method used

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  • A kind of cucurbit compound type hydrochloric acid pickling corrosion inhibitor
  • A kind of cucurbit compound type hydrochloric acid pickling corrosion inhibitor
  • A kind of cucurbit compound type hydrochloric acid pickling corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the preparation method and operation steps of hydrochloric acid pickling corrosion inhibitor of the present invention are as follows: first add water to dilute to certain concentration with commercially available concentrated hydrochloric acid, get this hydrochloric acid solution and add a certain amount of melon ring, obtain corrosion inhibitor solution, Put the corrosion inhibitor solution into the constant temperature equipment, and control the temperature at 20°C±1°C to carry out corrosion inhibition pickling on the iron for 4h. The specimens were cleaned and dried to constant weight to calculate the corrosion inhibition rate. The result is as follows:

[0020]

Embodiment 2

[0021] Embodiment 2: the preparation method and operation steps of hydrochloric acid pickling corrosion inhibitor of the present invention are as follows:

[0022] First dilute to a certain concentration with commercially available concentrated hydrochloric acid and water.

[0023] The auxiliary corrosion inhibitor is obtained by mixing polyethylene glycol and triton at a weight ratio of 1:1.

[0024] Take the hydrochloric acid solution and add a certain amount of melon ring and corrosion inhibitor to obtain a corrosion inhibitor solution. Put the corrosion inhibitor solution into a constant temperature equipment, and control the temperature at 20°C ± 1°C to carry out corrosion inhibition pickling on iron for 4 hours. The specimens were cleaned and dried to constant weight to calculate the corrosion inhibition rate. The result is as follows:

[0025]

Embodiment 3

[0026] Embodiment 3: the preparation method and operation steps of hydrochloric acid pickling corrosion inhibitor of the present invention are as follows: first add water to dilute to certain concentration with commercially available concentrated hydrochloric acid, get this hydrochloric acid solution and add a certain amount of six yuan cucurbit ring and cinnamaldehyde, obtain Corrosion inhibitor solution, put the corrosion inhibitor solution into constant temperature equipment, and control the temperature at 20°C ± 1°C to carry out corrosion inhibition pickling on iron for 4 hours. The specimens were cleaned and dried to constant weight to calculate the corrosion inhibition rate. The result is as follows:

[0027]

[0028]

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Abstract

The invention discloses a compound hydrochloric acid pickling corrosion inhibitor. The corrosion inhibitor is characterized by taking cucurbit[5]uril, cucurbit[6]uril, cucurbit[7]uril or cucurbit[8]uril as a main agent, being formed by compounding the main agent with one or more of triton, polyethylene glycol, cinnamaldehyde, 4-N,N-dimethylamino cinnamaldehyde, 3-(4-pyridyl)-acraldehyde, and being balanced with water.

Description

technical field [0001] The invention relates to the field of metal pickling corrosion inhibitors, in particular to a composite hydrochloric acid pickling corrosion inhibitor for different metals such as aluminum, iron, copper and zinc. Background technique [0002] As the most important engineering material, metal has a long history of being widely used all over the world. However, the corrosion of metal has also become a global problem. Metal corrosion is the phenomenon that metal is damaged under the action of corrosive media such as water, oxygen, electrolyte ions, acid, alkali, chemical gas and mineral oil. During the processing and utilization of metal materials, it is necessary to remove the corroded oxide layer on the surface. Frequent use Hydrochloric acid, sulfuric acid and other inorganic acids are cleaned and removed. In order to remove the oxide layer and at the same time ensure that the effective part is not corroded by acid, a common method is to add a corrosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06
CPCC23G1/063
Inventor 马培华周开志魏连通
Owner GUIZHOU UNIV
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