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Acid washing corrosion inhibitor

A technology of pickling corrosion inhibitor and active agent, which is applied in the field of pickling corrosion inhibitor, can solve the problems of high production cost, environmental pollution, three wastes, etc., and achieve the effect of simple production process, low production cost and excellent water solubility

Inactive Publication Date: 2011-08-17
浙江爱迪亚营养科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of production cost, the corrosion inhibitors of aldehydes, ketones and amines have to go through a complex synthesis process, the production cost is high, and the production process will produce three wastes and pollute the environment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Preparation of the present embodiment corrosion inhibitor;

[0024] Take a 500ml four-neck flask, add 100g of mixed alkylpyridine, 80g of ethanol or methanol, stir, heat to about 80°C, and reflux for 0.5h (h refers to the unit of time hour, that is, English hour, the same below), to make the mixed alkyl Pyridine is fully dissolved in ethanol; after the dissolution is complete, add about 70g of benzyl chloride dropwise for 0.5 to 1 hour. After the drop is complete, control the reaction temperature at 80°C and continue to stir and reflux for about 8-12 hours to obtain brown to black The oily liquid is prepared into mixed alkylpyridine quaternary ammonium salt, then add 5g of nonionic surfactant OP-10 (OP-10 refers to alkylphenol polyoxyethylene ether, the same below), stir evenly, and prepare It has become a corrosion inhibitor for mixed alkylpyridine quaternary ammonium salts.

[0025] Different mixed alkylpyridine quaternary ammonium corrosion inhibitors can be prepare...

Embodiment 2

[0029] Corrosion inhibitor composition: mixed alkyl allyl pyridinium quaternary ammonium salt 50g, 1g nonionic surfactant OP-10,

[0030] Hydrochloric acid: 15%, 20%

[0031] Use the above corrosion inhibitor and hydrochloric acid to carry out normal pressure static corrosion test, refer to China National Petroleum Corporation "Acidification Corrosion Inhibitor Performance Test Method and Evaluation Index" SY / T5405-1996, test temperature 60 ℃, 90 ℃, corrosion time 4h , the results are shown in Table 1 and Table 2 below.

Embodiment 3

[0033] Corrosion inhibitor composition: 50g of mixed alkyl epoxypropylene pyridinium quaternary ammonium salt, 1g of nonionic surfactant OP-10

[0034] Hydrochloric acid: 15%, 20%

[0035] Use the above corrosion inhibitor and hydrochloric acid to carry out normal pressure static corrosion test, refer to China National Petroleum Corporation "Acidification Corrosion Inhibitor Performance Test Method and Evaluation Index" SY / T5405-1996, test temperature 60 ℃, 90 ℃, corrosion time 4h , the results are shown in Table 1 and Table 2 below.

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Abstract

The invention discloses an acid washing corrosion inhibitor, which is characterized by comprising the following components in percentage by weight: 30 to 70 percent of mixed alkyl pyridine quaternary ammonium salt, 25 to 50 percent of alcohol, 1 to 4 percent of nonionic surfactant and the balance of water. Compared with the prior art, the acid washing corrosion inhibitor has the advantages that: a pharmaceutical byproduct is mixed with alkyl pyridine to perform modification so as to research the corrosion inhibitor; the acid washing corrosion inhibitor has higher water solubility; the corrosion inhibition effect of the acid washing corrosion inhibitor is superior to that of the common aldehyde ketone amine type corrosion inhibitor; the application temperature range of the acid washing corrosion inhibitor is wider than that of the aldehyde ketone amine type corrosion inhibitor; the aldehyde ketone amine type corrosion inhibitor is easy to carbonize under the condition of high temperature, so that the corrosion inhibition effect is influenced; and in addition, the acid washing corrosion inhibitor is lower in production cost compared with the aldehyde ketone amine type corrosion inhibitor, has a simple production process, has no generation of three wastes (waste water, waste gas and industrial residues) and meets the requirement for environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of metal surface cleaning treatment, in particular to a pickling corrosion inhibitor for pickling carbon steel materials and equipment. Background technique [0002] Strong acid cleaning surface rust and dirt is an important cleaning method for surface pretreatment of metal materials, cleaning and descaling of pipelines and boiler systems, and is still widely used in metal materials, machinery, electric power, chemical and other industries. Due to the corrosiveness of strong acid, over-corrosion often occurs during the pickling process, that is, not only the rust and dirt on the surface are removed during the cleaning process, but also part of the metal substrate is also washed off together, so the pickling process causes metal damage. Great waste of material and pickling fluid. Also produced a large amount of pickling waste liquid at the same time, caused serious environmental pollution. Therefore, reduci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
Inventor 应国海陈启明姜雄
Owner 浙江爱迪亚营养科技开发有限公司
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