Corrosion inhibitor capable of inhibiting carbon steel from corroding in salt water (sea) medium, preparation method and application thereof

A technology of corrosion inhibitor and brine, which is applied in the field of carbon steel anticorrosion, can solve the problems of poor thermal stability of corrosion inhibitors, large dosage of corrosion inhibitors, complex formulas, etc., achieve low toxicity, improve comprehensive performance, and increase corrosion inhibition rate Effect

Active Publication Date: 2015-12-23
马鞍山市鸿伟环化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, formaldehyde is used in the corrosion inhibitor formula, which has the problem of high toxicity; in addition, the formula is complex and the amount used is large; the corrosion inhibitor has poor thermal stability
[0008] Sun Liming et al. (Sun Liming, Wei Yutang, Zhang Xuerong, Research on Carbon Steel Corrosion Inhibitors in Salt Water Medium, Hebei Chemical Industry, No. 6, 2004, 57-58) studied a cost-effective carbon steel corrosion inhibitor in sal

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  • Corrosion inhibitor capable of inhibiting carbon steel from corroding in salt water (sea) medium, preparation method and application thereof

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Embodiment 1

[0038] A corrosion inhibitor for inhibiting the corrosion of carbon steel in salt water medium, which is composed of zinc sulfate, calcium gluconate, sodium tungstate, sodium silicate, thiourea, alcoholamine phosphate, lauryl glucoside, Isopropyl hexadecanoate and water, the mass parts of each component are: 30 parts of zinc sulfate, 10 parts of calcium gluconate, 10 parts of sodium tungstate, 5 parts of sodium silicate, 2 parts of thiourea, olamine phosphoric acid 3 parts of ester, 0.5 part of lauryl glucoside, 0.7 part of isopropyl hexadecanoate, 38 parts of water.

[0039] The preparation method of above-mentioned corrosion inhibitor is:

[0040] (a) Take by weighing 10 parts of calcium gluconate in proportion and dissolve it in 38 parts of distilled water at 50° C., stir (stirring speed is 260 rpm) and dissolve to obtain an aqueous solution of calcium gluconate;

[0041] (b) Take 10 parts of sodium tungstate in proportion and add it to the calcium gluconate aqueous soluti...

Embodiment 2

[0059] A corrosion inhibitor for inhibiting the corrosion of carbon steel in salt water medium, which is composed of zinc sulfate, calcium gluconate, sodium tungstate, sodium silicate, thiourea, alcoholamine phosphate, lauryl glucoside, Isopropyl hexadecanoate and water, the parts by mass of each component are: 20 parts of zinc sulfate, 15 parts of calcium gluconate, 5 parts of sodium tungstate, 10 parts of sodium silicate, 1 part of thiourea, olamine phosphoric acid 5 parts of ester, 0.3 part of lauryl glucoside, 1 part of isopropyl hexadecanoate, 30 parts of water.

[0060] The preparation method of above-mentioned corrosion inhibitor is:

[0061] (a) First take by weighing 15 parts of calcium gluconate in proportion and dissolve in 30 parts of distilled water at 55°C, stir (stirring speed is 190rpm) and dissolve to obtain an aqueous solution of calcium gluconate;

[0062] (b) Take 5 parts of sodium tungstate in proportion and add it to the calcium gluconate aqueous solutio...

Embodiment 3

[0068] A corrosion inhibitor for inhibiting the corrosion of carbon steel in salt water medium, which is composed of zinc sulfate, calcium gluconate, sodium tungstate, sodium silicate, thiourea, alcoholamine phosphate, lauryl glucoside, Isopropyl hexadecanoate and water, the mass parts of each component are: 40 parts of zinc sulfate, 5 parts of calcium gluconate, 15 parts of sodium tungstate, 3 parts of sodium silicate, 3 parts of thiourea, olamine phosphoric acid 1 part of ester, 0.8 part of lauryl glucoside, 0.5 part of isopropyl hexadecanoate, 45 parts of water.

[0069] The preparation method of above-mentioned corrosion inhibitor is:

[0070] (a) First take 5 parts of calcium gluconate in proportion and dissolve it in 45 parts of distilled water at 60° C., stir (stirring speed is 300 rpm) and dissolve to obtain an aqueous solution of calcium gluconate;

[0071] (b) Take 15 parts of sodium tungstate in proportion and add it to the calcium gluconate aqueous solution and st...

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Abstract

The invention discloses a corrosion inhibitor capable of inhibiting carbon steel from corroding in salt water (sea) medium, a preparation method and application thereof, and belongs to the technical field of corrosion inhibition of carbon steel. The corrosion inhibitor comprises 20-40 parts of zinc sulfate, 5-15 parts of calcium gluconate, 5-15 parts of sodium tungstate, 3-10 parts of sodium silicate, 1-3 parts of thiourea, 1-5 parts of ethanolamine phosphate, 0.3-0.8 parts of dodecyl polyglucoside, 0.5-1 part of hexadecanoic acid isopropyl ester, and 30-45 parts of water. The preparation method comprises the following steps: (a) dissolving the calcium gluconate in water according to the proportion, stirring and dissolving; (b) adding the sodium tungstate into the solution obtained by the step (a), stirring and dissolving; (c) sequentially adding zinc sulfate, thiourea, ethanolamine phosphate and dodecyl polyglucoside into the solution obtained by the step (b) according to the proportion, stirring and dissolving, and adding calcium silicate and stirring; (d) adding hexadecanoic acid isopropyl ester according to the proportion and stirring for 10-15 min. The corrosion inhibitor has advantages of high corrosion inhibition efficiency, small dosage, low cost, convenient use, and environmentally friendly type.

Description

technical field [0001] The invention belongs to the field of carbon steel anticorrosion, and more specifically relates to a corrosion inhibitor for inhibiting the corrosion of carbon steel in salt water (sea water) medium, its preparation method and application. Background technique [0002] At present, in the refrigeration industry, industrial calcium chloride and sodium chloride aqueous solutions are still widely used in various types of refrigerators and equipment and occasions that need to lower the freezing point due to their low freezing point and low price. However, due to the certain corrosiveness of industrial calcium chloride and sodium chloride aqueous solutions, when used as anti-freezing agents, anti-corrosion issues should be considered to ensure the service life of the equipment. In addition, since human beings are facing a crisis of serious shortage of fresh water resources, it is imperative to vigorously develop and utilize seawater. The development and uti...

Claims

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Application Information

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IPC IPC(8): C23F11/16
Inventor 孙立明孙若思唐胜卫李平侯水根贾虹
Owner 马鞍山市鸿伟环化有限公司
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