Water-based long-term antirust agent preparing method

A kind of anti-rust agent, water-based technology, applied in the field of preparation of water-based long-term anti-rust agent, can solve the problems of no adhesion of the coating, no anti-rust effect, and difficult drying of the anti-rust film

Active Publication Date: 2019-07-23
LANGFANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based anti-rust agents reported in the existing research all have problems such as poor anti-rust performance, difficult drying of the anti-rust film, and no adhesion to the coating after painting, which cannot achieve the anti-rust effect of replacing anti-rust oil

Method used

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preparation example Construction

[0037] figure 1 It is a flow chart of an embodiment of a preparation method of a water-based long-term anti-rust agent of the present invention. As shown in the figure, the present invention provides a preparation method of a water-based long-term anti-rust agent, comprising the following steps:

[0038] (1) Preparation of silsesquioxane

[0039] Add an organic solvent to distilled water and stir to form an organic-water two-phase solution, and control the temperature at 25-40°C. Start the agitator and add methyltrichlorosilane dropwise to the organic-water two-phase solution. According to the mass ratio, Distilled water: organic solvent: methyltrichlorosilane ratio is 2-2.5: 1-1.2: 1-1.2, the dropwise addition time is 30-50min, after the dropwise addition is completed, continue to react for 45min, stop stirring, and filter the reaction slurry under reduced pressure , wash the precipitate with water for 2-3 times, transfer the precipitate to a constant temperature oven at 100...

Embodiment 1

[0057] The amount of sodium methyl silicate concentrate plays a very critical role in the developed antirust agent. Because no sodium methyl silicate is added, the antirust agent formulated with other determined raw materials cannot quickly form a dry film on the metal surface , so sodium methyl silicate is an essential raw material in this water-based rust inhibitor. When the concentration is too small, the anti-rust film will be uneven and the anti-rust performance will be poor; but if the concentration is too high, the anti-rust agent will precipitate or precipitate when placed, and a uniform film-forming liquid will not be formed, which will affect its anti-rust effect. The maximum amount to be added within the scope of forming a uniform solution system is 6g / L.

Embodiment 2

[0059] Take different amounts of LS-150, respectively 0g, 1.25g, 2.5g, 3.75g, 5g, 6.25g, in a 250mL beaker, dilute to the mark with 6g / L sodium methyl silicate concentrate, LS-150 The concentrations are 0g / L, 5g / L, 10g / L, 15g / L, 20g / L, 25g / L respectively, and the copper sulfate drop test is carried out on the anti-rust treated test pieces. The experimental results are as follows: Figure 5 As shown, it can be seen that with the increase of the amount of LS-150, the antirust ability becomes stronger and stronger, and when a certain amount is added, the antirust performance begins to deteriorate. Therefore, the optimum range of LS-150 obtained in the experiment is 10g / L-20g / L.

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Abstract

The invention discloses a water-based long-term antirust agent preparing method. The water-based long-term antirust agent preparing method comprises the following steps that silsesquioxane is prepared; sodium methyl silicate is prepared; tribasic acid.triethanolamine salt is prepared, triethanolamine is added in tribasic acid for standing for 10 min, slight heating and stirring are conducted tilldissolving, and the faint yellow and transparent tribasic acid.triethanolamine salt is obtained; a water-based long-term antirust agent is prepared, a sodium methyl silicate concentrated solution is diluted, then, TC-941, LS-150 and the tribasic acid.triethanolamine salt are added in the diluted sodium methyl silicate concentrated solution to be stirred, PH is adjusted to be 9-14, and the water-based long-term antirust agent is obtained after uniform stirring. By adoption of the above water-based long-term antirust agent preparing method, the metal long-term antirust water base technical breakthrough is achieved; and metal materials treated through the antirust agent can be directly subjected to coating treatment without complex treatment procedures such as rust removal, oil removal, phosphorization and passivation, and the market vacancy in the field is filled up.

Description

technical field [0001] The invention relates to the technical field of preparation of antirust agents, in particular to a preparation method of a water-based long-term antirust agent. Background technique [0002] Metals in the atmosphere will react chemically or electrochemically with water, oxygen and other impurities under certain conditions to cause metal corrosion. Metal corrosion is a problem often encountered in production. It not only seriously damages metal materials in terms of their shape, color and mechanical properties, but more importantly, reduces the quality level of products, and damages precision and sensitivity. Tens of millions of tons of iron and steel are scrapped due to metal corrosion every year in the world, causing serious economic losses. Therefore, the research on iron and steel antirust technology has received more and more attention. [0003] At present, anti-rust oil is mostly used for long-term storage and anti-rust of steel products, but th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 张成根于淑媛王树军张巧云陈泽民
Owner LANGFANG NORMAL UNIV
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