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Compound corrosion inhibitor for inhibiting copper-based metal

A compound corrosion inhibitor and metal technology, which is applied in the field of inhibiting copper-based metals in the cleaning field, to achieve the effects of emulsification ability and corrosion inhibition performance improvement, strong antifouling effect, and strong chelating ability

Inactive Publication Date: 2017-05-24
NANTONG BOTAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion inhibitor in the cleaning agent generally uses a single corrosion inhibitor, and the corrosion inhibition effect of a single corrosion inhibitor has certain limitations. Corrosion performance and environmentally friendly composite corrosion inhibitors have become research hotspots

Method used

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  • Compound corrosion inhibitor for inhibiting copper-based metal
  • Compound corrosion inhibitor for inhibiting copper-based metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment inhibits the composite corrosion inhibitor of copper-based metals. The composite corrosion inhibitor is composed of the following components by weight: 1 part of benzotriazole, 30 parts of methylbenzotriazole, 12 parts of sodium silicate 3 parts, 3 parts of iminodisuccinic acid tetrasodium copper complexing agent, 25 parts of citric acid and 5 parts of surfactant, wherein, described surfactant is mixed by oleic acid triethanolamine and aliphatic amine polyoxyethylene ether 3.39 parts of triethanolamine oleate, 1.61 parts of fatty amine polyoxyethylene ether.

Embodiment 2

[0017] This embodiment inhibits the composite corrosion inhibitor of copper-based metals. The composite corrosion inhibitor is composed of the following components by weight: 1 part of benzotriazole, 30 parts of methylbenzotriazole, 12 parts of sodium silicate 3 parts, 3 parts of iminodisuccinic acid tetrasodium copper complexing agent, 25 parts of citric acid and 5 parts of surfactant, wherein, described surfactant is mixed by oleic acid triethanolamine and aliphatic amine polyoxyethylene ether 3.57 parts of triethanolamine oleate, 1.43 parts of fatty amine polyoxyethylene ether.

Embodiment 3

[0019] This embodiment inhibits the composite corrosion inhibitor of copper-based metals. The composite corrosion inhibitor is composed of the following components by weight: 1 part of benzotriazole, 30 parts of methylbenzotriazole, 12 parts of sodium silicate 3 parts, 3 parts of iminodisuccinic acid tetrasodium copper complexing agent, 25 parts of citric acid and 5 parts of surfactant, wherein, described surfactant is mixed by oleic acid triethanolamine and aliphatic amine polyoxyethylene ether 3.48 parts of triethanolamine oleate, 1.52 parts of fatty amine polyoxyethylene ether.

[0020] Following table 1 is the mass ratio of each raw material in the tensio-active agent in embodiment 1~3:

[0021] D Example 1 Example 2 Example 3 Triethanolamine Oleate 2.1 2.5 2.3 Aliphatic amine polyoxyethylene ether 1 1 1

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PUM

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Abstract

The invention relates to a compound corrosion inhibitor for inhibiting copper-based metal. The compound corrosion inhibitor is composed of, by weight, 1-3 parts of benzotriazole, 16-30 parts of methylbenzotriazole, 8-12 parts of sodium silicate, 1-3 parts of a copper complexing agent, 15-25 parts of citric acid and 2-5 parts of a surfactant, wherein the surfactant is formed by mixing triethanolamine oleate and fatty amine polyoxyethylene ether, and the mass ratio of triethanolamine oleate and fatty amine polyoxyethylene ether is 2.1-2.5 to 1. The compound corrosion inhibitor has the beneficial effects that with methylbenzotriazole as the main component of the compound corrosion inhibitor, by adding other effective components, corrosion inhibition coordination among multiple substances is conducted, the content of all the components is strictly controlled, and accordingly, the corrosion inhibition function of the compound corrosion inhibitor can be improved.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitor production, in particular to a method for inhibiting copper-based metals from cleaning [0002] Composite corrosion inhibitor for corrosion in process. Background technique [0003] Metal corrosion will cause great economic losses and safety hazards. In chemical cleaning, corrosion inhibitors are usually added to reduce metal corrosion. Copper and its alloys are widely used in the industry to make heat exchangers and reactors due to their good heat transfer performance and easy processing. When the heat exchanger runs for a long time, carbonate scale and silicic acid scale will be deposited on the inner wall. Salt scale, iron oxide scale, organic scale, etc. will significantly reduce the heat transfer effect, and even cause metal corrosion. Usually, it is necessary to select a suitable cleaning agent for descaling. However, the corrosion inhibitor in the cleaning agent generally uses a single ...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/10
CPCC23G1/06C23G1/103
Inventor 黄海涛王宏李桂萍
Owner NANTONG BOTAO CHEM