WO2019006682A1

WO2019006682A1 - Antirust agent, metal workpiece, and surface antirust treatment method therefor

Info

Publication number: WO2019006682A1
Application number: PCT/CN2017/091750
Authority: WO
Inventors: 方招娣
Original assignee: 深圳市长宏泰科技有限公司
Priority date: 2017-07-04
Filing date: 2017-07-04
Publication date: 2019-01-10
Also published as: CN110809647A

Abstract

An antirust agent, a metal workpiece, and an antirust treatment method therefor. Based on 500 parts by weight, the antirust agent comprises the following components in parts by weights: 0.5 parts to 4 parts of potassium dichromate, 0.1 part to 1 part of triethanolamine oleic soap, 0.5 parts to 2 parts of hexamethylene tetramine, 1 part to 4 parts of boric acid, 0.5 parts to 2 parts of sodium dodecyl benzene sulfonate, 2 parts to 10 parts of trisodium phosphate, a proper amount of hydrogen peroxide and the balance water. The antirust agent can form a dense polar protective film on metal surfaces, also has anti-mildew and anti-corrosion properties, can be used more safely, can be widely used in antirust treatment of surfaces in the fine processing of a variety of molds, instruments and parts, can also be used for carrying out antirust treatment between processes before coating, and can maintain the original color of the metal.

Description

Rust inhibitor, metal workpiece and surface anti-rust treatment method thereof

[0001] The present invention relates to the technical field of metal surface treatment, and in particular to a rust preventive agent, a metal workpiece and a surface rustproof treatment method thereof.

Background technique

[0002] In order to improve the surface properties or appearance of a product, the surface treatment technology of the workpiece is usually applied. For example, the surface treatment of aluminum, iron and their alloys is involved in a wide range of industries. Moreover, most workpieces require pre-treatment before surface treatment, for example, cleaning, decontamination and degreasing, and metal workpieces for certain applications also require rust protection.

[0003] In daily life, it is well known that hardware devices are prone to oxidative rust, so rust-proof treatment is required. Usually, a passivation film is formed on the surface of the workpiece by an oxide such as sodium nitrite to provide a certain rust prevention. effect. However, these rust-preventing methods are prone to crystallization by using a sub-nano solution, and the effect is not good, and if subsequent spraying requires re-cleaning.

technical problem

[0004] In view of the above, there is provided a rust preventive agent which is excellent in rust prevention effect, convenient to use, and environmentally friendly, and a metal workpiece and a surface rustproof treatment method thereof.

Problem solution

Technical solution

[0005] A rust inhibitor comprising 500 parts by weight of the following components by weight: 0.5-4 parts of potassium dichromate, 0.1 to 1 part of triethanolamine oleate soap, 0.5 to 2 parts of Liu Ya Methyltetramine, 1-4 parts of boric acid, 0.5-2 parts of sodium dodecylbenzene sulfonate, 2-10 parts of trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance of water.

[0006] A metal workpiece anti-rust treatment method, comprising the following steps: first weigh potassium dichromate, then add 40 parts of water, stir to dissolve, then drop hydrogen peroxide, make it green, and then add the rest Water, and then add the above components in turn, while stirring, to fully dissolve; the treatment temperature of the anti-rust solution is 40-80 ° C, the metal workpiece is treated with a rust-preventing solution, and after a predetermined daytime treatment, it is dried.

[0007] Also, a metal workpiece having a surface of the metal workpiece in accordance with the surface of the metal workpiece as described above The method is formed with a rustproof protective film.

Advantageous effects of the invention

Beneficial effect

[0008] The above rust preventive agent can form a dense protective film on the surface of the metal, and has excellent anti-rust and anti-corrosion effects on the metal surface, and can fundamentally solve the crystallization phenomenon occurring with the Yana solution. The rust inhibitor has anti-mold and anti-corrosion properties and is safer to use. It can be widely used for anti-rust treatment of various molds, instruments and parts finishing surfaces, and can maintain the primary color of metal. The rust inhibitor can replace the traditional sodium nitrite rust inhibitor, and is inexpensive and easy to use. The passivation protective film formed by the rust preventive agent can be rustproof for 6 months, and can be rustproof for a long time in combination with the immersion rust preventive oil, and is colorless and odorless, has no side effects on the human body, and is environmentally friendly and energy-saving.

Embodiments of the invention

The present invention will be described in detail below with reference to specific embodiments.

[0010] An embodiment of the present invention provides a rust inhibitor, which comprises: 0.5-4 parts of potassium dichromate, 0.1-1 part of triethanolamine oleic acid soap, 0.5-2 parts of hexamethylene four, in terms of 500 parts by weight. Amine, 1-4 parts boric acid, 0.5-2 parts sodium dodecylbenzene sulfonate, 2- 10 parts trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance water.

[0011] Specifically, the parts by weight of the potassium dichromate are 2-3. Preferably, the triethanolamine oleic acid soap has a weight fraction of 0.4 to 0.8 parts, and the hexamethylenetetramine has a weight fraction of 1 to 2 parts. The boric acid is in an amount of from 2 to 3 parts by weight, and the sodium dodecylbenzenesulfonate is preferably from 1 to 2 parts by weight. The weight ratio of the trisodium phosphate is preferably 4-8 parts.

[0012] In the above rust preventive agent, a better rust preventive effect is achieved by controlling the balance of the respective distribution ratios. The rust preventive agent can form a dense protective film on the metal surface, and has excellent anti-rust and anti-corrosion effects on the metal surface, and can fundamentally solve the crystallization phenomenon occurring with the Yana solution. The anti-rust agent has anti-mold and anti-corrosion properties, is safer to use, and can be widely used for anti-rust treatment of various molds, instruments, and parts finishing surfaces, and can maintain the primary color of metal. The rust inhibitor can replace the traditional sodium nitrite rust inhibitor, and is inexpensive and easy to use. The passivation protective film formed by the rust preventive agent can be rust-proof for 6 months, and can be rust-proof for a long time in combination with the immersion rust preventive oil, and is colorless and odorless, has no side effects on the human body, and is environmentally friendly and energy-saving.

[0013] The embodiment of the present invention further provides a metal workpiece surface anti-rust treatment method, comprising the following steps: preparing the rust preventive agent as described above; the anti-rust solution treatment temperature is 40-80 ° C, the metal workpiece is used Anti-rust solution After drying, it is processed after the scheduled daytime treatment.

[0014] Specifically, the anti-rust treatment of the metal workpiece can be performed by soaking or spraying, and the soaking effect is the best. In the anti-rust treatment, it is preferable that the metal workpiece is immersed in the crucible of the anti-rust solution for 2 to 5 minutes. Before the rust prevention, the workpiece should be thoroughly degreased and derusted. If the pretreatment is not appropriate, it will affect the rust prevention effect. Large machines can be sprayed with low pressure water jets for corrosion protection. Small parts or complex shapes can be soaked.

[0015] Embodiments of the present invention also provide a metal workpiece having a rustproof protective film formed on the surface of the metal workpiece in accordance with the surface rustproof treatment method of the metal workpiece as described above. After the anti-rust treatment, a dense protective film can be formed on the metal surface, which can fundamentally solve the crystallization phenomenon occurring with the Yana solution. The rust inhibitor has anti-mold and anti-corrosion properties and is safer to use. After the rust-proofing, the electrical conductivity of the parts is not affected, and the electroplating or phosphating and painting treatment can be continued. It is not necessary to remove the oil as the oil-soluble rust preventive agent, and the use is extremely convenient. Moreover, the rust preventive agent does not pollute the environment, and is generally rustproof for 2-6 months. The specific rust prevention depends on the environment, humidity and temperature.

[0016] The rust preventive agent and the passivation treatment method thereof in the embodiments of the present invention are described by way of specific examples, and the following steels in which the metal workpiece is uniformly cleaned are taken as an example.

[0017] Embodiment 1

[0018] The ingredients are mixed in the following parts by weight (total parts by weight is 500 parts): 0.5 part potassium dichromate, 0.1 part triethanolamine oleic acid soap, 0.5 part hexamethylenetetramine, 1 part boric acid, 0.5 Sodium dodecylbenzene sulfonate, 2 parts of trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance of water. Weigh the potassium dichromate first, then add 40 parts of water, stir to dissolve, then add hydrogen peroxide to make it green, then add the remaining water, then add the above components in turn, and stir while stirring to make it full. Dissolved, formulated as a rust inhibitor.

[0019] Treatment method: preparing the rust preventive agent as described above; the temperature of the rust preventive solution is 80 ° C, the metal workpiece is treated with the rust preventive solution, after 5 minutes of treatment, drying, usually natural drying, drying can be .

[0020] After the above-mentioned anti-rust solution treatment, the surface of the workpiece was observed, and it was found that the surface of the metal workpiece was uniform in color, and no foreign matter such as crystals and crystals were stored, and the room was stored for 56 days without rust.

Embodiment 2

[0022] The components are mixed in the following parts by weight (total parts by weight is 500 parts): 1.5 parts potassium dichromate, 0.3 parts triethanolamine oleic acid soap, 1 part hexamethylenetetramine, 2 parts boric acid, 1 Sodium dodecylbenzene sulfonate, 4 parts of trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance of water. Weigh the potassium dichromate first, then add 40 parts of water, stir Mix and dissolve, then add hydrogen peroxide, make it green, then add the remaining water, then add the above components in turn, stir while adding, fully dissolve, and prepare a rust inhibitor.

[0023] Treatment method: preparing the rust preventive agent as described above; the temperature of the rust preventive solution is 70 ° C, the metal workpiece is treated with a rust preventive solution, after 5 minutes of treatment, drying, usually natural drying, drying can be .

[0024] After the above-mentioned anti-rust solution treatment, the surface of the workpiece was observed, and it was found that the surface of the metal workpiece was uniform in color, and no foreign matter such as crystals and crystals were stored, and the interior was stored for 98 days without rust.

Embodiment 3

[0026] The ingredients were mixed in the following parts by weight (total parts by weight: 500 parts): 2.5 parts potassium dichromate, 0.6 parts triethanolamine oleic acid soap, 1.5 parts hexamethylenetetramine, 3 parts boric acid, 1.5 Sodium dodecylbenzene sulfonate, 6 parts of trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance of water. Weigh the potassium dichromate first, then add 40 parts of water, stir to dissolve, then add hydrogen peroxide to make it green, then add the remaining water, then add the above components in turn, and stir while stirring to make it full. Dissolved, formulated as a rust inhibitor.

[0027] Treatment method: preparing the rust preventive agent as described above; the temperature of the rust preventive solution is 60 ° C, the metal workpiece is treated with a rust preventive solution, after 4 minutes of treatment, drying, usually natural drying, drying can be .

[0028] After the above-mentioned anti-rust solution treatment, the surface of the workpiece was observed, and it was found that the surface of the metal workpiece was uniform in color, and no foreign matter such as crystals and crystals were stored, and the interior was stored for 123 days without rust.

Embodiment 4

[0030] The ingredients are mixed in the following parts by weight (total parts by weight is 500 parts): 4 parts potassium dichromate, 1 part triethanolamine oleic acid soap, 2 parts hexamethylenetetramine, 4 parts boric acid, 2 Sodium dodecylbenzene sulfonate, 10 parts of trisodium phosphate, an appropriate amount of hydrogen peroxide and the balance of water. Weigh the potassium dichromate first, then add 40 parts of water, stir to dissolve, then add hydrogen peroxide to make it green, then add the remaining water, then add the above components in turn, and stir while stirring to make it full. Dissolved, formulated as a rust inhibitor.

[0031] Treatment method: preparing the rust preventive agent as described above; the temperature of the rust preventive solution is 60 ° C, the metal workpiece is treated with a rust preventive solution, after 4 minutes of treatment, drying, usually natural drying, drying can be .

[0032] After the above-mentioned anti-rust solution treatment, the surface of the workpiece was observed, and it was found that the surface of the metal workpiece was uniform in color, and no foreign matter such as crystals and crystals were stored, and the interior was stored for 186 days without rust.

It should be noted that the present invention is not limited to the above embodiments, and other changes may be made by those skilled in the art according to the inventive spirit of the present invention, and the changes made according to the inventive spirit of the present invention, All should be included in the scope of the claimed invention

Claims

Claim

[Claim 1] A rust inhibitor, characterized in that the agent comprises, by weight of 500 parts by weight, a component of the following parts by weight: 0.5-4 parts of potassium dichromate, 0.1-1 part of triethanolamine oleic acid soap, 0.5-2 parts of hexamethylenetetramine, 1-4 parts of boric acid, 0.5-2 parts of sodium dodecylbenzenesulfonate, 2-10 parts of trisodium phosphate,

[Claim 2] The rust inhibitor according to claim 1.

For 2-3.

[Claim 3] The rust inhibitor according to claim 1, wherein the triethanolamine oleate soap has a weight fraction of 0.4 to 0.8 parts.

[Claim 4] The rust inhibitor according to claim 1, wherein the hexamethylenetetramine is in an amount of from 1 to 2 parts by weight.

[Claim 5] The rust inhibitor according to claim 1, wherein the boric acid is in an amount of from 2 to 3 parts by weight.

[Claim 6] The rust inhibitor according to claim 1, wherein the sodium dodecylbenzenesulfonate is in an amount of from 1 to 2 parts by weight.

[Claim 7] The rust inhibitor according to claim 1, wherein the trisodium phosphate is in a weight ratio of 4-8.

[Claim 8] A metal workpiece surface anti-rust treatment method, comprising the following steps:

The rust preventive agent according to any one of 1 to 7, wherein the rust preventive solution is treated at a temperature of 40 to 80 ° C, and the metal workpiece is treated with a rust preventive solution, and after a predetermined daytime treatment, it is dried.

[Claim 9] The method for preventing surface rust of a metal workpiece according to claim 8, wherein the rust preventive solution is immersed in a metal workpiece or sprayed on a metal workpiece, and the processing time is 2- 5 minutes.

[Claim 10] A metal workpiece characterized in that the metal workpiece surface is formed with a rustproof protective film according to the metal workpiece surface rustproof treatment method according to claim 8.