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Corrosion inhibitor capable of effectively resisting chloride ion corrosion and preparation method thereof

A technology of chloride ion corrosion and corrosion inhibitor, which is applied in the field of corrosion inhibitor for system circulating water treatment, to achieve good corrosion inhibition effect

Inactive Publication Date: 2016-10-12
广州市南峰水处理工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Stainless steel equipment water coolers are commonly used in PVC circulating water systems, and corrosion damage accidents are very serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: the preparation of corrosion inhibitor

[0017] Raw material weight ratio:

[0018] Sodium dodecylbenzenesulfonate, 14 parts; Sodium borate, 13 parts; Sodium nitrite, 18 parts; Isothiazolinone, 12 parts; Dimethylformamide, 7 parts; Lauryl betaine, 10 parts Glycerin, 13 parts; Water, 45 parts; Disodium sebacate and benzotriazole are 8 parts altogether, and the ratio of disodium sebacate and benzotriazole by weight is 7:1.

[0019] Preparation:

[0020] Step S1, mixing isothiazolone, dimethylformamide, glycerin and benzotriazole at 45-55°C and stirring evenly;

[0021] Step S2, dissolving sodium dodecylbenzenesulfonate, sodium borate, sodium nitrite, dodecyl betaine and disodium sebacate in water, and completely dissolving at 40-50°C;

[0022] In step S3, slowly add the liquid prepared in step S1 to the liquid prepared in step S2 until the liquid is evenly stirred.

Embodiment 2

[0023] Embodiment 2: the preparation of corrosion inhibitor

[0024] Raw material weight ratio:

[0025] Sodium dodecylbenzenesulfonate, 12 parts; Sodium borate, 11 parts; Sodium nitrite, 16 parts; Isothiazolinone, 10 parts; Dimethylformamide, 6 parts; Lauryl betaine, 8 parts Glycerin, 12 parts; Water, 40 parts; A total of 7 parts of disodium sebacate and benzotriazole, the ratio of disodium sebacate and benzotriazole by weight is 6:1.

[0026] Preparation:

[0027] Step S1, mixing isothiazolone, dimethylformamide, glycerin and benzotriazole at 45-55°C and stirring evenly;

[0028] Step S2, dissolving sodium dodecylbenzenesulfonate, sodium borate, sodium nitrite, dodecyl betaine and disodium sebacate in water, and completely dissolving at 40-50°C;

[0029] In step S3, slowly add the liquid prepared in step S1 to the liquid prepared in step S2 until the liquid is evenly stirred.

Embodiment 3

[0030] Embodiment 3: the preparation of corrosion inhibitor

[0031] Raw material weight ratio:

[0032] Sodium dodecylbenzenesulfonate, 16 parts; Sodium borate, 15 parts; Sodium nitrite, 20 parts; Isothiazolinone, 14 parts; Dimethylformamide, 8 parts; Lauryl betaine, 12 parts Glycerin, 14 parts; Water, 50 parts; Disodium sebacate and benzotriazole are 9 parts altogether, and the ratio of disodium sebacate and benzotriazole by weight is 8:1.

[0033] Preparation:

[0034] Step S1, mixing isothiazolone, dimethylformamide, glycerin and benzotriazole at 45-55°C and stirring evenly;

[0035] Step S2, dissolving sodium dodecylbenzenesulfonate, sodium borate, sodium nitrite, dodecyl betaine and disodium sebacate in water, and completely dissolving at 40-50°C;

[0036] In step S3, slowly add the liquid prepared in step S1 to the liquid prepared in step S2 until the liquid is evenly stirred.

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PUM

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Abstract

The invention discloses a corrosion inhibitor capable of effectively resisting chloride ion corrosion and a preparation method thereof. The corrosion inhibitor comprises, by weight, 12-16 parts of sodium dodecyl benzene sulfonate, 11-15 parts of sodium borate, 16-20 parts of sodium nitrite, 10-14 parts of Kathon886, 6-8 parts of dimethylformamide, 8-12 parts of dodecyl dimethyl betaine, 12-14 parts of glycerol, 40-50 parts of water, and 7-9 parts of disodium sebacate and benzotriazole with the weight part ratio being 6-8:1. The corrosion inhibitor disclosed by the invention can resist corrosion to stainless steel equipment by high concentration chloride ions, the corrosion inhibition effect is related to the weight part ratio of the disodium sebacate to benzotriazole in raw materials, and the corrosion inhibition effect is best when the weight part ratio of the disodium sebacate to benzotriazole is 6-8:1.

Description

technical field [0001] The invention relates to a corrosion inhibitor for system circulating water treatment, in particular to a corrosion inhibitor which can effectively resist chloride ion corrosion and a preparation method thereof. Background technique [0002] Stainless steel equipment water coolers are commonly used in PVC circulating water systems, and corrosion damage accidents are very serious. With the shortage of water sources, it is imminent to reuse water rationally. The reason why the concentration ratio cannot be increased is that it is limited by the concentration of chloride ions. According to the national standard GB50050-2007 industrial circulating cooling water treatment design requirements, stainless steel heat exchanger equipment, water flow Chloride ions in the tube pass ≤1000mg / L. The water goes through the shell side, the temperature of the water side wall on the heat transfer surface is not more than 70°C, the outlet temperature of the cooling water...

Claims

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Application Information

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IPC IPC(8): C23F11/08
CPCC23F11/08
Inventor 竹洪燕
Owner 广州市南峰水处理工程有限公司