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Metal corrosion inhibitor and application and preparation method thereof

A metal corrosion inhibitor and metal processing fluid technology, applied in the field of metal processing fluids, can solve problems such as poor stability, complex formula system of metal processing fluids, and inability to maintain new performance and functions for a long time, so as to achieve the effect of improving stability

Pending Publication Date: 2021-12-03
SHENZHEN FRANCOOL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] And in the prior art, the function of the corrosion inhibitor is single, so that when it is applied in the metal working fluid, in order to improve some properties of the metal working fluid or give some new functions of the metal working fluid, it is necessary to add additional The addition of specific ingredients in the metal processing fluid makes the formula system of the metal working fluid complex, and it is precisely because of the complexity of the formula system of the metal working fluid that the improved performance or the new function endowed cannot be maintained for a long time, and there is a problem of poor stability

Method used

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  • Metal corrosion inhibitor and application and preparation method thereof
  • Metal corrosion inhibitor and application and preparation method thereof
  • Metal corrosion inhibitor and application and preparation method thereof

Examples

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preparation example Construction

[0042] The preparation method of metal corrosion inhibitor comprises the steps:

[0043] S1, dissolving sodium metasilicate in water to obtain solution A;

[0044] S2, adding organosilicon into solution A to react to obtain solution B;

[0045] S3. Adding the nucleophilic reagent into the solution B to react until the solution is transparent to obtain an aqueous solution containing the modified organosilicon.

[0046] Preferably, in S1, the temperature of the solution A is 70-80°C.

[0047] Preferably, the mass ratio of the organosilicon to sodium metasilicate is 2-10:1.

[0048] When the mass ratio of organosilicon to sodium metasilicate is 2 to 10:1, it can effectively avoid excessive polymerization of organosilicon and sodium metasilicate, and precipitate larger particles, so that it is difficult for nano silicon particles to deposit on the metal surface. Stable corrosion inhibitor layer.

[0049] Preferably, the mass ratio of the organosilicon to the nucleophile is 1˜5...

Embodiment 1

[0057] Dissolve sodium metasilicate (10g) in 50g water and heat up to 70°C, then add organosilicon (20g) while stirring, and stir at 70°C for 1h after the addition until the solution is clear, then add sodium sulfite (20g), and The mixture was heated to 99°C and stirred for 2 hours to obtain a clear, transparent, light yellow metal corrosion inhibitor.

Embodiment 2

[0059] Dissolve sodium metasilicate (10g) in 110g water and heat up to 70°C, then add organosilicon (50g) while stirring, and stir at 70°C for 1h after the addition until the solution is clear, then add sodium sulfite (50g), and The mixture was heated to 99°C and stirred for 3 hours to obtain a clear, transparent, light yellow metal corrosion inhibitor.

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Abstract

The invention belongs to the technical field of metal working fluid, and particularly relates to a metal corrosion inhibitor and application and a preparation method thereof. The metal corrosion inhibitor comprises an effective amount of modified organic silicon; the modified organic silicon is prepared through a reaction of at least one epoxy group contained in the modified organic silicon and a nucleophilic reagent; and the nucleophilic reagent is selected from at least one of glutamic acid, sodium sulfite, sodium thiosulfate and diethanol amine. The metal corrosion inhibitor can be suitable for total synthesis type metal working fluid and emulsion type metal working fluid, and good stability is shown in work; and meanwhile, the specific nucleophilic reagent can be grafted to the organic silicon so that the metal corrosion inhibitor can have the specific function, and accordingly the application range of the metal corrosion inhibitor is widened.

Description

technical field [0001] The invention belongs to the technical field of metal working fluids, and in particular relates to a metal corrosion inhibitor and its application and preparation method. Background technique [0002] Metal corrosion inhibitors are one of the core components in metalworking fluids. They can combine with metal surfaces to form a protective layer, thereby slowing down corrosion problems in metal processing and subsequent storage, transportation and use. [0003] Traditional metal salt corrosion inhibitors, such as nitrite, chromate, etc., will introduce great environmental side effects in actual use. Under the increasingly stringent environmental protection policy requirements, such corrosion inhibitors have been phased out by the market . Newer corrosion inhibitors, such as polyoxyethylene ether phosphate, have better solved the problem of environmental pollution during use, but their shortcomings are also very prominent, that is, under the action of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/173C08G77/392C08G77/388C08G77/18C08G77/06
CPCC23F11/173C08G77/392C08G77/388C08G77/18C08G77/06
Inventor 赵超赵阳张俊范成力
Owner SHENZHEN FRANCOOL TECH
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