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Water-soluble anthranilic acid polymer carbon steel acid cleaning inhibitor and application thereof

An anthranilic acid and pickling corrosion inhibitor technology, applied in the field of water-soluble anthranilic acid polymer carbon steel pickling corrosion inhibitor, can solve the problems of toxic side effects, lack of market competitiveness, etc., and achieve a sustainable effect Strong ability, good application prospect, simple effect of synthesis

Inactive Publication Date: 2010-12-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently commonly used corrosion inhibitors mainly include inorganic corrosion inhibitors containing chromate and some organic corrosion inhibitors containing phosphorus. Their discharge may cause eutrophication of water bodies. Most of the corrosion inhibitors in the same field have toxic and side effects , not competitive in the market

Method used

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  • Water-soluble anthranilic acid polymer carbon steel acid cleaning inhibitor and application thereof
  • Water-soluble anthranilic acid polymer carbon steel acid cleaning inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The pickling liquid is dilute hydrochloric acid, the concentration is 1M, and the molar ratio of anthranilic acid and polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer (PEO-PPO-PEO) is added to the water-soluble The anthranilic acid polymer carbon steel corrosion inhibitor is added in an amount of 5% solution mass fraction, and the cleaned steel is immersed in the pickling solution for 5 hours at room temperature.

[0019] The highest corrosion inhibition efficiency obtained through experimental testing is 86%, which shows that it is a more efficient cleaning agent.

Embodiment 2

[0021] The pickling solution is dilute hydrochloric acid, the concentration is 1M, and the o The aminobenzoic acid polymer carbon steel corrosion inhibitor is added in an amount of 5% solution mass fraction, and the cleaned steel is immersed in the pickling solution for 5 hours at room temperature.

[0022] The highest corrosion inhibition efficiency obtained through experimental testing is 88%, which shows that it is a more efficient cleaning agent.

Embodiment 3

[0024] The pickling solution is dilute hydrochloric acid with a concentration of 1M, and the o The aminobenzoic acid polymer carbon steel corrosion inhibitor is added in an amount of 5% solution mass fraction, and the cleaned steel is immersed in the pickling solution for 5 hours at room temperature.

[0025] The highest corrosion inhibition efficiency obtained through experimental testing is 92%, which shows that it is an efficient cleaning agent.

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Abstract

The invention provides an acid cleaning inhibitor and application thereof, in particular an anthranilic acid polymer carbon steel acid cleaning inhibitor for preventing unnecessary corrosion and acid liquor consumption of the carbon steel and products thereof in the acid cleaning process, and application thereof. The inhibitor is prepared from anthranilic acid and a surfactant serving as raw materials through ammonium persulfate oxidizing reaction under a certain condition. The application is to soak and clean the carbon steel by using cleaning solution added with the inhibitor, wherein the cleaning solution is hydrochloric acid solution with the concentration of 1mol / L; and each liter of the acid liquor is added with 0.05 to 1 percent of the acid cleaning inhibitor for soaking the carbon steel for 5 hours at room temperature. The inhibitor has the advantages of no toxin, no harm, easy water solubility, high inhibition efficiency, and the like; and the anthranilic acid polymer carbon steel acid cleaning inhibitor can prevent excessive corrosion of base metal and excessive consumption of the acid liquor in the acid cleaning process by cleaning the carbon steel and the surfaces of the products thereof, and also has the advantages of low consumption, high efficiency and strong sustained action capacity.

Description

1. Technical field [0001] The invention relates to the technical field of corrosion inhibitor production, in particular to a water-soluble anthranilic acid polymer carbon steel pickling used to prevent unnecessary corrosion and acid consumption of carbon steel and its products in the pickling process Corrosion inhibitors and their applications. 2. Background technology [0002] Pickling is a convenient, efficient and low-cost method widely used in various industrial sectors of society to remove scale and corrosion products on metal surfaces and restore the functions of heat exchange and cooling equipment. It can not only reduce fuel consumption, fuel exhaust gas and air pollution caused by dirt in the pipeline, protect the environment, but also eliminate a series of safety hazards, such as: in the water cycle of boiler thermal equipment, impurities in water and steam are mixed and attached Scale, etc. are formed on the surface of the metal, and these dirt will deteriorate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/04C23G1/08
Inventor 于建强石福花王秀通侯保荣
Owner QINGDAO UNIV
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