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Preparation method and application of water-based antirust agent used before coating

A water-based rust inhibitor and coating technology, applied in the direction of metal material coating process, can solve the problems of toxicity, inconvenience, complex preparation, etc., and achieve the effect of reducing cost, simplifying process and simple process flow

Active Publication Date: 2013-01-30
SINO TRUK JINAN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing problems of toxicity, complicated preparation and inconvenient use in the existing antirust agents, the present invention provides a water-based antirust agent applied before painting. At the same time, it has no effect on the adhesion of the subsequent coating, and can realize the rust prevention of the workpiece during the pre-painting treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Optimization test of film-forming agent phytate

[0030] On the basis of the quantification of other additives in the water-based antirust agent, adjust the amount of phytate, and use the same process to test the effect of different additions of phytate on metal rust resistance and post-coat adhesion In order to determine the optimal addition amount of phytate,

[0031] 1.1 Test process

[0032] 1.1.1 Test solution preparation process

[0033] Take 5 parts of diethanolamine laurate, 2 parts of sodium molybdate and 6 parts of ammonium borate, dissolve them in 20 parts of deionized water respectively, mix and stir evenly for later use, and take another 10 parts of mixed alcohol amine for later use. Prepare five parts of the above-mentioned materials for later use, respectively take 2 parts, 3 parts, 5 parts, 6 parts, and 8 parts of phytic acid ester, and process them according to the preparation method steps of the water-based antirust agent, respectively marked as 1...

Embodiment 2

[0050] 1. Optimization test of diethanolamine laurate

[0051] On the basis of the quantification of other additives in the water-based antirust agent, adjust the amount of carboxylate amine, and use the same process to detect the effect of different additions of carboxylate amine on the metal rust resistance and the adhesion of the post-coating. Determine the optimal addition amount of carboxyamine.

[0052] 1.1 Test process

[0053] 1.1.1 Test solution preparation process

[0054] Take 2 parts of sodium molybdate and 6 parts of ammonium borate, dissolve them in 45 parts of deionized water respectively, mix and stir evenly for later use, and take another 10 parts of mixed alcohol amines and 4 parts of phytic acid ester for mixed reaction for later use. Prepare five parts of the above materials for later use, respectively take 2 parts, 4 parts, 5 parts, 6 parts, and 8 parts of diethanolamine laurate, and treat them according to the preparation method of water-based antirust ...

Embodiment 3

[0072] 1. Optimization test of mixed alcohol amines

[0073] 1.1 Test process

[0074] 1.1.1 Test solution preparation process

[0075] First, heat 25 parts of deionized water to 50-60° C., take 4 parts of phytic acid ester, stir and dissolve for 5-10 minutes, and make it uniform for later use. Five parts of the above solution are prepared for later use. Then weigh the corresponding amounts of monoethanolamine, diethanolamine and triethanolamine according to the ratio in Table 3, mix them, and label the reagents as A, B, C, D, E and F.

[0076] Table 3 Mixed alcohol amine reagents in different proportions

[0077] Reagent

A

B

C

D

E

F

monoethanolamine

1

2

1

2

1

1

Diethanolamine

1

2

2

1

2

1

[0078] Triethanolamine

1

2

1

1

2

2

[0079] Add the mixed alcohol amine reagents labeled A to F...

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Abstract

The invention discloses a preparation method and an application of a water-based antirust agent used before coating. The preparation method comprises the following steps: (1) preparation of a film forming agent, comprising adding inositol hexaphosphate into deionized water, uniformly stirring in a reactor, adding mixed alcohol amine and stirring to react; and (2) preparation of water-based antirust agent, comprising respectively dissolving carboxylic acid amine, sodium molybdate and boric acid amine with the deionized water, sequentially adding into the reactor, stirring with the film forming agent solution to a homogeneous state to obtain the water-based antirust agent. The application of the water-based antirust agent used before coating comprises the following construction process: degreasing, ??washing, preventing rust, blowing accumulated water and drying. The water-based antirust agent used before coating provided by the invention satisfies anticorrosion capability of the workpieces between processes, has no effects on adhesion forces of subsequent coatings at the same time, can realize rust resistance of the workpieces between processes before the coating, and is non-toxic, environmentally friendly and simple in preparation method and construction process.

Description

technical field [0001] The invention relates to a corrosion-resistant and water-soluble metal anti-rust agent, in particular to a preparation method and application of a water-based anti-rust agent with good coating performance. Background technique [0002] In the manufacturing process of engine block, gearbox block and axle housing, some manufacturers adopt the process of overall painting after assembly. Because it is an assembly assembly, many parts cannot be phosphating before painting to prevent corrosion. Therefore, the pre-treatment process of the overall coating is generally: degreasing→water washing→water washing→drying. Alkaline degreasing agent is used for degreasing, the temperature is 50-60 ℃, and tap water is used for washing. During this process, the surface of the workpiece is easily rusted, which affects the subsequent coating process. For this reason, it is necessary to add a certain amount of water-based antirust agent in the water washing process after ...

Claims

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Application Information

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IPC IPC(8): C23C22/60C23C22/68
Inventor 施茜邢思伟李玉宁赵明强于安军董伦
Owner SINO TRUK JINAN POWER
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