Rust transforming agent as well as preparation and use methods thereof

Abstract

The invention is applied to the technical field of iron rust converting agents, and discloses an iron rust converting agent, which is prepared from the following raw materials in parts by weight: 65.2 to 83.7 parts of a rust converting agent, 31.5 to 46.2 parts of organic phosphate, 15.4 to 24.3 parts of polyether modified siloxane ester, 79.2 to 93.6 parts of emulsion, 0.5 to 1.2 parts of a curing agent and 50.2 to 64.8 parts of deionized water. The rust conversion agent is prepared from 35.2 to 42.6 parts of borate and 24.5 to 37.6 parts of boric acid ester. According to the iron rust transforming agent, the mode that borate and borate are used for transforming rust on the surface of a workpiece in batches is adopted, so that borate can generate an anti-rust layer through rapid reaction with a large amount of rust; and then through a mode of coating the borate again, the borate can further convert the rust and protect a protective layer generated by the borate at the same time, so that protection failure caused by hydrolysis of the borate is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rust conversion agents, in particular to a rust conversion agent and a preparation and use method thereof. Background Art

[0002] In many industrial and civil fields, the rust problem of metal materials has always been a major problem that has troubled people. As time goes by, the metal surface is exposed to the air or in a humid environment, and it is very easy to undergo oxidation reaction to form rust. The presence of rust not only affects the appearance of metal products, but also reduces their mechanical properties and service life, and may even cause safety hazards. At present, common rust removal methods mainly include mechanical rust removal, chemical rust removal and sandblasting rust removal. Mechanical rust removal usually requires a lot of manpower and material resources, and the rust removal effect is limited, and it is difficult to remove deep rust. Although chemical rust removal can effectively remove rust to a certain extent, it often uses corrosive chemicals such as strong acids and strong alkalis, which cause serious pollution to the environment and also cause certain damage to the metal matrix. Sandblasting rust removal is costly, and a large amount of dust will be generated during the operation, which is harmful to the health of the operator. Therefore, there is an urgent need for an efficient, environmentally friendly, and low-cost rust conversion agent that can convert rust into a stable substance, thereby protecting the metal matrix and extending the service life of metal products. Summary of the invention

[0003] The object of the present invention is to provide a rust conversion agent and a preparation and use method thereof, so as to solve the problem that the traditional rust removal method mentioned in the above background technology is not good.

[0004] To achieve the above object, the present invention provides the following technical solution: a rust conversion agent, comprising raw materials in parts by weight: 65.2-83.7 parts of rust conversion agent, 31.5-46.2 parts of organic phosphate, 15.4-24.3 parts of polyether modified siloxane ester, 79.2-93.6 parts of emulsion, 0.5-1.2 parts of curing agent and 50.2-64.8 parts of deionized water;

[0005] The rust-removing agent comprises 35.2-42.6 parts of borate and 24.5-37.6 parts of boric acid ester.

[0006] Preferably, the organic phosphate is one of aluminum tripolyphosphate-zinc phosphate-iron red or aluminum tripolyphosphate-zinc phosphate-zinc oxide.

[0007] Preferably, the emulsion is one of styrene emulsion or polyurethane emulsion.

[0008] Preferably, the curing agent is one of an organic bismuth drier or a VAE emulsion.

[0009] A method for preparing a rust conversion agent comprises the following steps:

[0010] S1. Preparation of component A: add organic phosphate to deionized water, keep warm at 35-43°C and stir for 17-28 minutes to obtain component A;

[0011] S2. Preparation of component B: Mix the polyether-modified silicone ester with the emulsion and add the remaining deionized water, keep warm at 24-34°C and stir for 8-17 minutes to obtain component B;

[0012] S3. Preparation of a rust conversion agent: Divide component A into two parts according to the ratio of borate and borate ester to each other, and then add the borate and borate ester to the two parts of component A and stir them to obtain a borate bottom solution and a borate bottom solution;

[0013] S4. Encapsulating the borate base solution, the borate ester base solution, the B component and the curing agent to obtain a combined rust conversion agent

[0014] Preferably, the stirring speed in S1 is 240-320 r / min, and the heating rate is controlled at 4-6° C. / min.

[0015] Preferably, the stirring speed in S2 is 160-270 r / min, and the heating rate is controlled at 3-5° C. / min. A method of using a rust conversion agent comprises the following steps:

[0016] T1. Apply the borate base solution on the workpiece surface, let it stand at room temperature for 1 hour, and then polish the workpiece surface to remove the protrusions on the workpiece surface;

[0017] T2. Apply the borate primer solution to the polished workpiece surface and let it stand at room temperature for 0.5h;

[0018] T3. Mix component B and the curing agent thoroughly, and quickly apply the mixture on the surface of the workpiece after mixing;

[0019] T4. Place the workpiece horizontally and leave it for 2 hours until the mixture on the workpiece surface is completely solidified.

[0020] Preferably, the unevenness of the workpiece after grinding in T1 is less than 4 mm / 2 m.

[0021] Preferably, the borate base layer solution in T2 is coated in layers multiple times, and the number of coating layers is not less than 3 layers.

[0022] Compared with the prior art, the invention has the following beneficial effects: the rust conversion agent:

[0023] The rust on the surface of the workpiece is transformed by borate and boric acid ester in batches, so that the borate can generate an anti-rust layer by quickly reacting with a large amount of rust, and then the boric acid ester is coated again so that the boric acid ester can further transform the rust and protect the protective layer generated by the borate, thereby preventing the borate from being hydrolyzed and causing the protection to fail. At the same time, a curing agent is mixed with a polyether-modified silicone ester and an emulsion and then coated on the surface of the boric acid ester to form a smooth surface layer, thereby protecting the anti-rust layer and improving the defect that the surface of the boric acid ester is easy to be sticky, thereby reducing the possibility of the workpiece being rusted again due to the long-term residence of the corrosive liquid. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The invention provides a technical solution: a rust conversion agent.

[0026] Embodiment 1:

[0027] Add aluminum tripolyphosphate-zinc phosphate-iron red into deionized water, keep warm at 38°C and stir for 22 minutes to obtain component A;

[0028] The polyether-modified siloxane ester and the styrene emulsion were mixed and the remaining deionized water was added, and the mixture was stirred at 28° C. for 13 minutes to obtain component B;

[0029] Dividing component A into two parts according to the ratio of borate and borate ester, and then adding borate and borate ester into the two parts of component A respectively and stirring them fully to obtain a borate bottom layer solution and a borate ester bottom layer solution;

[0030] The borate base solution, the borate ester base solution and the B component are respectively encapsulated with the VAE emulsion to obtain a combined rust conversion agent.

[0031] Embodiment 2:

[0032] Add aluminum tripolyphosphate-zinc phosphate-zinc oxide to deionized water, keep warm at 43°C and stir for 22 minutes to obtain component A;

[0033] The polyether-modified siloxane ester and the styrene emulsion were mixed and the remaining deionized water was added, and the mixture was stirred at 28° C. for 13 minutes to obtain component B;

[0034] Dividing component A into two parts according to the ratio of borate and borate ester, and then adding borate and borate ester into the two parts of component A respectively and stirring them fully to obtain a borate bottom layer solution and a borate ester bottom layer solution;

[0035] The borate base solution, the borate ester base solution and the B component are respectively encapsulated with the VAE emulsion to obtain a combined rust conversion agent.

[0036] Embodiment three:

[0037] Add aluminum tripolyphosphate-zinc phosphate-iron red into deionized water, keep warm at 38°C and stir for 22 minutes to obtain component A;

[0038] The polyether-modified siloxane ester and the polyurethane emulsion were mixed and the remaining deionized water was added, and the mixture was stirred at 34° C. for 17 minutes to obtain component B;

[0039] Dividing component A into two parts according to the ratio of borate and borate ester, and then adding borate and borate ester into the two parts of component A respectively and stirring them fully to obtain a borate bottom layer solution and a borate ester bottom layer solution;

[0040] The borate base solution, the borate ester base solution and the B component are respectively encapsulated with an organic bismuth drying agent to obtain a combined rust conversion agent.

[0041] Comparative Example:

[0042] Add aluminum tripolyphosphate-zinc phosphate-iron red into deionized water, keep warm at 38°C and stir for 22 minutes to obtain component A;

[0043] Add borate to component A and stir thoroughly to obtain a borate solution;

[0044] The borate solution is encapsulated to obtain a rust conversion agent.

[0045] Table 1 - Depth of penetration of rust stains on workpieces by the inventive rust remover (mm)

[0046]

[0047] It can be seen from Table 1 that when borate is used as the rust-removing agent in Examples 1 to 3 and the comparative example, the depth of action on the surface of the target workpiece is the same.

[0048] Table 2 - Remaining ratio of exposed rust area after application of the invention rust remover (%)

[0049]

[0050] As can be seen from Table 2, when Examples 1 to 3 use borate and borate ester as rust-removing agents for double coating, the rust conversion degree on the target workpiece surface is higher than that in the comparative example when only borate coating is used as rust-removing agent for the target workpiece surface.

[0051] Table 3 - Surface quality of the inventive rust remover after coating

[0052]

[0053] It can be seen from Table 3 that, compared with the comparative example, the surface quality of the workpiece after the rust removal agent is applied to the examples 1 to 3 is better and the coverage of the rust is higher.

[0054] Table 4 - Drying rate of the inventive rust remover after coating

[0055]

[0056] It can be seen from Table 4 that the drying rate of Example 3 is better than that of Example 1 and the comparative example under normal temperature and high temperature conditions.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rust conversion agent, characterized in that: The raw materials are calculated by weight: 65.2-83.7 parts of rust remover, 31.5-46.2 parts of organic phosphate, 15.4-24.3 parts of polyether modified silicone ester, 79.2-93.6 parts of emulsion, 0.5-1.2 parts of curing agent and 50.2-64.8 parts of deionized water; The rust-removing agent comprises 35.2-42.6 parts of borate and 24.5-37.6 parts of boric acid ester.

2. The rust conversion agent according to claim 1, characterized in that: The organic phosphate is one of aluminum tripolyphosphate-zinc phosphate-iron red or aluminum tripolyphosphate-zinc phosphate-zinc oxide.

3. The rust conversion agent according to claim 1, characterized in that: The emulsion is one of styrene emulsion or polyurethane emulsion.

4. The rust conversion agent according to claim 1, characterized in that: The curing agent is one of an organic bismuth drier or a VAE emulsion.

5. A method for preparing the rust conversion agent according to any one of claims 1 to 4, characterized in that: The steps include: S1. Preparation of component A: add organic phosphate to deionized water, keep warm at 35-43°C and stir for 17-28 minutes to obtain component A; S2. Preparation of component B: Mix the polyether-modified silicone ester with the emulsion and add the remaining deionized water, keep warm at 24-34°C and stir for 8-17 minutes to obtain component B; S3. Preparation of a rust conversion agent: Divide component A into two parts according to the ratio of borate and borate ester to each other, and then add the borate and borate ester to the two parts of component A and stir them to obtain a borate bottom solution and a borate bottom solution; S4. Encapsulate the borate base solution, the borate ester base solution, the B component and the curing agent respectively to obtain a combined rust conversion agent.

6. The method for preparing a rust conversion agent according to claim 5, characterized in that: The stirring speed in S1 is 240-320 r / min, and the heating speed is controlled at 4-6°C / min.

7. The method for preparing a rust conversion agent according to claim 5, characterized in that: The stirring speed in S2 is 160-270 r / min, and the heating speed is controlled at 3-5° C. / min.

8. A method for using the rust conversion agent according to any one of claims 1 to 4, characterized in that: The steps include: T1. Apply the borate base solution on the workpiece surface, let it stand at room temperature for 1 hour, and then polish the workpiece surface to remove the protrusions on the workpiece surface; T2. Apply the borate primer solution to the polished workpiece surface and let it stand at room temperature for 0.5h; T3. Mix component B and the curing agent thoroughly, and quickly apply the mixture on the surface of the workpiece after mixing; T4. Place the workpiece horizontally and leave it for 2 hours until the mixture on the surface of the workpiece is completely solidified.

9. A method of using a rust conversion agent according to claim 8, characterized in that: The unevenness of the workpiece after grinding in T1 is less than 4mm / 2m.

10. The method of using a rust conversion agent according to claim 8, characterized in that: The borate base layer solution in T2 is coated in layers multiple times, and the number of coating layers is not less than 3 layers.

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