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Circulating water composite corrosion inhibitor

A composite corrosion inhibitor, corrosion inhibitor technology, applied in the direction of descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the adverse effects of metal production, use and secondary processing, corrosion and other problems, to achieve good biodegradability and excellent corrosion inhibition effect

Inactive Publication Date: 2013-04-10
王忠举
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in oxygen-containing oxidizing acids and NH +4 、CN - and other solutions, especially around SO 2 、H 2 S, Cl - When it is used, it will cause serious corrosion, which will bring adverse effects on the production, use and secondary processing of metals.

Method used

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  • Circulating water composite corrosion inhibitor
  • Circulating water composite corrosion inhibitor
  • Circulating water composite corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A circulating water composite corrosion inhibitor consists of the following components in parts by mass:

[0021]

[0022] In this example:

[0023] The inorganic salt corrosion inhibitor is tungstate;

[0024] Described chitosan is that the degree of N-deacetylation is 95%, and the average molecular weight is 1.3×10 6 high degree of deacetylation chitosan.

Embodiment 2

[0026] A circulating water composite corrosion inhibitor consists of the following components in parts by mass:

[0027]

[0028] In this example:

[0029] The inorganic salt corrosion inhibitor is molybdate;

[0030] Described chitosan is that N-deacetylation degree is 90%, average molecular weight is 1.1 * 10 6 high degree of deacetylation chitosan.

Embodiment 3

[0032] A circulating water composite corrosion inhibitor consists of the following components in parts by mass:

[0033]

[0034] In this example:

[0035] The inorganic salt corrosion inhibitor is zinc salt;

[0036] Described chitosan is N-deacetylation degree at 75%, average molecular weight is 9.7 * 10 5 Chitosan with a moderate degree of deacetylation.

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Abstract

The invention provides a circulating water composite corrosion inhibitor which is prepared from the following components in parts by mass: 10-25 parts of inorganic salt corrosion inhibitor, 1-5 parts of 2-phospho-1,2,4-tricarboxylate butane, 4-10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 5-10 parts of lignin and 10-15 parts of chitosan. The inorganic salt corrosion inhibitor is tungstate, molybdate or zinc salt; and the chitosan is medium-high-deacetylation-degree chitosan of which the N-deacetylation degree is 75-95% and the average molecular weight is 9.7*10<5>-1.3*10<6>.

Description

technical field [0001] The invention relates to a circulating water corrosion inhibitor, in particular to a circulating water composite corrosion inhibitor. Background technique [0002] In order to save fresh water resources and reduce water consumption, circulating water has been widely used in industrial cooling water instead of once-through water. However, in the circulating cooling water system, there are problems such as scaling, corrosion, deposition and microbial reproduction. Because water contains a large amount of dissolved or suspended solids, organic substances and various gases. Usually, because a layer of loose and porous oxide film can be formed on the surface of metal equipment, the corrosion resistance of metal is better. However, in oxygen-containing oxidizing acids and NH +4 、CN - and other solutions, especially around SO 2 、H 2 S, Cl - When it is used, it will produce more serious corrosion, which will have adverse effects on the production, use a...

Claims

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Application Information

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IPC IPC(8): C23F11/18C23F11/173C23F11/00C02F5/14
Inventor 王忠举
Owner 王忠举
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