WO2019006681A1 - Antirust agent, metal workpiece, and antirust treatment method therefor - Google Patents

Abstract

An antirust agent, a metal workpiece, and an antirust treatment method therefor. Based on 1000 parts by weight, the antirust agent comprises the following components in parts by weights: 20 parts to 50 parts of sorbitol, 5 parts to 20 parts of benzoic acid, 10 parts to 20 parts of triethanolamine, 6 parts to 15 parts of boric acid, 2 parts to 12 parts of sodium carbonate, 1 part to 5 parts of morpholine, 0.1 part to 0.5 parts of dimethicone and the balance water. The antirust agent can form a dense polar protective film on metal surfaces, can fundamentally resolve the crystallization phenomenon occurring in a sodium nitrite solution. The antirust agent 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

 Description: A rust preventive, a metal workpiece and a rustproof 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 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 rustproof treatment method thereof.

 Problem solution

 Technical solution

 [0005] A rust inhibitor comprising 1000 parts by weight of the following components by weight: 20-50 parts of sorbitol, 5- 20 parts of benzoic acid, 10-20 parts of triethanolamine, 6-15 parts of boric acid, 2-12 parts sodium carbonate, 1-5 parts morpholine, 0.1-0.

5 parts of dimethicone and the balance of water.

[0006] A metal workpiece anti-rust treatment method, comprising the steps of: preparing a rust preventive agent as described above; the rust preventive solution has a pH of 9-11, and the metal workpiece is treated with a rust preventive solution, after a predetermined daytime After treatment, drying

[0007] Also, a metal workpiece having a rustproof protective film formed on the surface of the metal workpiece in accordance with the metal workpiece rustproof treatment method as described above. 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 comprising, in parts by weight, 20-50 parts of sorbitol, 5-20 parts of benzoic acid, 10-20 parts of triethanolamine, and 1000 parts by weight. -15 parts of boric acid, 2-12 parts of sodium carbonate, 1-5 parts of morpholine, 0.1-0.5 parts of dimethicone and the balance of water.

 [0011] Specifically, the sorbitol has a weight fraction of 30-40. Preferably, the benzoic acid is 10-15 parts by weight, and the triethanolamine is 12-18 parts by weight. The boric acid is 9-12 parts by weight, and the sodium carbonate is preferably 4-8 parts by weight. The morpholine is preferably 2-4 parts by weight. The dimethicone is preferably 0.2 to 0.4 parts by weight.

 [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] An embodiment of the present invention further provides a metal workpiece anti-rust treatment method, comprising the following steps: preparing a rust preventive agent as described above; a rust preventive solution having a pH of 9-11, and a metal workpiece using a rust preventive solution The treatment is dried after a predetermined daytime treatment. [0014] Specifically, the anti-rust treatment of the metal workpiece can be performed by soaking or spraying, and the soaking effect is optimal. In the anti-rust treatment, the metal workpiece is immersed in the anti-rust solution at a time of preferably 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, and mechanical parts with small 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 metal workpiece rustproof treatment method as described above. After the rust-proof 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 inhibitor 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: 1000 parts): 20 parts of sorbitol, 5 parts of benzoic acid, 10 parts of triethanolamine, 6 parts of boric acid, 2 parts of sodium carbonate, 1 part of morpholine, 0.1 part of dimethyl silicone oil and the balance of water, stirred, uniformly mixed, and formulated into a rust inhibitor.

[0019] Treatment method: preparing the rust preventive agent as described above; the pH value of the rust preventive solution is controlled at 9-11, the metal workpiece is treated with the rust preventive solution, after 5 minutes of treatment, drying, usually naturally drying and drying All right.

[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 70 days without rust.

Embodiment 2

 [0022] The ingredients are mixed in the following parts by weight (total parts by weight is 1000 parts): 30 parts of sorbitol, 10 parts of benzoic acid, 13 parts of triethanolamine, 8 parts of boric acid, 5 parts of sodium carbonate, 2 parts of morpholine, 0.2 parts of dimethyl silicone oil and the balance of water, stirred, uniformly mixed, and formulated into a rust inhibitor.

 [0023] Treatment method: preparing the rust preventive agent as described above; the pH value of the rust preventive solution is controlled at 9-11, the metal workpiece is treated with the rust preventive solution, after 5 minutes of treatment, drying, usually naturally drying and drying All right.

[0024] After the above-mentioned anti-rust solution treatment, the surface of the workpiece is observed, and the surface of the metal workpiece is found to be uniform in color, without The grain is free of foreign matter such as crystals and is stored indoors for 100 days without rust.

Embodiment 3

 [0026] The ingredients were mixed in the following parts by weight (total parts by weight: 1000 parts): 36 parts of sorbitol, 15 parts of benzoic acid, 16 parts of triethanolamine, 10 parts of boric acid, 7 parts of sodium carbonate, 3 parts of morpholine, 0.3 parts of dimethyl silicone oil and the balance of water, stirred, mixed evenly, formulated into a rust inhibitor.

[0027] Treatment method: preparing the rust preventive agent as described above; the pH value of the rust preventive solution is controlled at 9-11, the metal workpiece is treated with the rust preventive solution, after 4 minutes of treatment, drying, usually naturally drying and drying All right.

[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 130 days without rust.

Embodiment 4

 [0030] The ingredients were mixed in the following parts by weight (total parts by weight: 1000 parts): 43 parts of sorbitol, 18 parts of benzoic acid, 18 parts of triethanolamine, 12 parts of boric acid, 10 parts of sodium carbonate, 4 parts of morpholine, 0.4 parts of dimethyl silicone oil and the balance of water, stirred, uniformly mixed, and formulated into a rust inhibitor.

[0031] Treatment method: preparing the rust preventive agent as described above; the pH value of the rust preventive solution is controlled at 9-11, and the metal workpiece is treated with the rust preventive solution, after being treated for 3 minutes, dried, usually naturally dried and dried. All right.

[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 room was stored for 160 days without rust.

Example 5

 [0034] The ingredients are mixed in the following parts by weight (total parts by weight: 1000 parts): 50 parts of sorbitol, 20 parts of benzoic acid, 20 parts of triethanolamine, 15 parts of boric acid, 12 parts of sodium carbonate, 5 parts of morpholine, 0.5 parts of dimethyl silicone oil and the balance of water, stirred, mixed evenly, formulated into a rust inhibitor.

[0035] Treatment method: preparing the rust preventive agent as described above; the pH value of the rust preventive solution is controlled at 9-11, and the metal workpiece is treated with the rust preventive solution, after 2 minutes of treatment, drying, usually naturally drying and drying All right.

[0036] 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 190 days without rust.

[0037] 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 creative spirit of the present invention, and the changes according to the inventive spirit of the present invention should be It is intended to be included within the scope of the invention as claimed.

Claims

Claim  [Claim 1] A rust inhibitor, characterized in that, in terms of 1000 parts by weight, the agent comprises the following parts by weight: 20-50 parts of sorbitol, 5-20 parts of benzoic acid, 10-20 parts of three Ethanolamine, 6-15 parts of boric acid, 2-12 parts of sodium carbonate, 1-5 parts of morpholine, 0.1-0.5 parts of dimethicone and the balance of water.  [Claim 2] The rust inhibitor according to claim 1, wherein the sorbitol has a weight fraction of 3  0-40. [Claim 3] The rust inhibitor according to claim 1, wherein the benzoic acid is in a part by weight  0-15 servings. [Claim 4] The rust inhibitor according to claim 1, wherein the triethanolamine has a weight fraction of 12 to 18 parts. [Claim 5] The rust inhibitor according to claim 1, wherein the boric acid is 9-1 parts by weight.  2 servings. [Claim 6] The rust inhibitor according to claim 1, wherein the sodium carbonate has a weight fraction of 4  -8 servings. The weight fraction of morphine is 2-4. The dimethyl silicone oil has a weight fraction of 0.2 to 0.4. [Claim 7] The rust inhibitor according to claim 1, wherein the rust inhibitor is adjusted to have a pH of 9 to 11 by using ruthenium phosphate or soda ash. [Claim 8] A metal workpiece anti-rust treatment method, comprising the steps of: formulating the rust preventive agent according to any one of claims 1 to 6; the rust preventive solution having a pH of 9-11, the metal workpiece Treated with a rust preventive solution, dried after a predetermined daytime treatment.  [Claim 9] The metal workpiece anti-rust treatment method according to claim 8, wherein the anti-rust solution is cleaned by immersing the metal workpiece or spraying the metal workpiece, and the processing time is 2-5. minute.  [Claim 10] A metal workpiece characterized in that the surface of the metal workpiece is formed with a rustproof protective film according to the metal workpiece rustproofing treatment method according to claim 8.