WO2019006678A1

WO2019006678A1 - Antirust agent, metal workpiece, and antirust treatment method therefor

Info

Publication number: WO2019006678A1
Application number: PCT/CN2017/091746
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

Abstract

An antirust agent, a metal workpiece, and an antirust treatment method therefor. The antirust agent comprises the following components in parts by weights (based on 200 parts): 0.2 parts to 5 parts of sodium carbonate, 1 part to 3 parts of trisodium phosphate, 0.2 parts to 3 parts of triethanolamine, 0.5 parts to 4 parts of water-soluble silicone oil, 1 part to 3 parts of sodium tripolyphosphate 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 sodium-derived solutions. 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

Rust inhibitor, metal workpiece and 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 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, steel iron and its alloys involves 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 require rust protection.

[0003] In daily life, it is well known that hardware devices are prone to oxidative rust, so rust-preventing treatment is required. Usually, a passivation film is formed on the surface of the workpiece by an oxide such as nitrite or chromate. Certain rust prevention. However, the solution used in the nitrite rust prevention method is prone to crystallization, and if it is subsequently sprayed, it needs to be re-cleaned and toxic. The chromium ions in the chromate pollute the environment and cannot meet environmental requirements.

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 200 parts by weight of the following components by weight: 0.2-5 parts of soda ash, 1-3 parts of trisodium phosphate, 0.2-3 parts of triethanolamine, 0.5-4 parts of water-soluble Silicone oil, 1-3 parts of sodium tripolyphosphate 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 surface of the metal workpiece in accordance with the rust-preventing treatment of the metal workpiece as described above The method forms 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 nitrite and chromium salt rust inhibitors, 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 sealed for long-term rust prevention by immersion rust-proof 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 200 parts by weight of the following components by weight: 0.2-5 parts soda ash, 1-3 parts trisodium phosphate, 0.2-3 parts triethanolamine , 0.5-4 parts of water-soluble silicone oil, 1-3 parts of sodium tripolyphosphate and the balance of water.

[0011] Specifically, the parts by weight of the soda ash are 2-4. Preferably, the triassodium phosphate is in an amount of from 2 to 3 parts by weight, and the triethanolamine is in an amount of from 1 to 2 parts by weight. The water-soluble silicone oil is in an amount of from 2 to 3 parts by weight, and the sodium tripolyphosphate is preferably from 2-3 parts by weight. The pH is preferably 9-11.

[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 sealed for long-term rust prevention by immersion rust-proof 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 20 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 1-6 months. The specific rust prevention depends on the environment, humidity and temperature. For long-term anti-rust, the rust-proof parts can be wrapped and sealed with plastic film, and at least rust-proof for more than 6 months.

[0016] Hereinafter, the rust preventive agent and the passivation treatment method thereof and the like of the embodiments of the present invention are described by way of specific examples.

[0017] Embodiment 1

[0018] The components are mixed according to the following parts by weight (total parts by weight: 200 parts): 0.2 parts of soda ash, 1 part of trisodium phosphate, 0.2 part of triethanolamine, 0.5 part of water-soluble silicone oil, 1 part of sodium tripolyphosphate, stirred , evenly mixed, formulated as a rust inhibitor.

[0019] Treatment method: Prepare the rust inhibitor 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 10 minutes of treatment, it is dried, usually naturally dried and dried. 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 had no crystals, the color was uniform, and there was no foreign matter such as spots, and it was stored for 40 days without rusting.

Embodiment 2

[0022] The ingredients were mixed in the following parts by weight (total parts by weight: 200 parts): 1.5 parts of soda ash, 1.5 parts of trisodium phosphate, 1.2 parts of triethanolamine, 1.3 parts of water-soluble silicone oil, 1.5 parts of sodium tripolyphosphate, stirring , evenly mixed, formulated as a rust inhibitor.

[0023] Treatment method: preparing the rust inhibitor 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 10 minutes of treatment, drying, usually natural drying, drying All right.

[0024] After the above-mentioned anti-rust solution treatment, the surface of the workpiece is observed, and it is found that the surface of the metal workpiece has no crystal, and the color Uniform, no spots and other foreign matter, indoor storage for 55 days without rust.

Embodiment 3

[0026] The ingredients were mixed according to the following parts by weight (total parts by weight: 200 parts): 3 parts of soda ash, 2 parts of trisodium phosphate, 2 parts of triethanolamine, 2.2 parts of water-soluble silicone oil, 2 parts of sodium tripolyphosphate, stirring , evenly mixed, formulated as a rust inhibitor.

[0027] Treatment method: Prepare the rust inhibitor 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 10 minutes of treatment, it is dried, usually naturally dried and dried. 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 had no crystals, the color was uniform, and there was no foreign matter such as spots, and the indoor storage did not rust for 115 days.

Embodiment 4

[0030] The ingredients were mixed in the following parts by weight (total parts by weight: 200 parts): 4 parts soda ash, 2.5 parts of trisodium phosphate, 2.5 parts of triethanolamine, 3.3 parts of water-soluble silicone oil, 2.5 parts of sodium tripolyphosphate, stirring , evenly mixed, formulated as a rust inhibitor.

[0031] Treatment method: Prepare the rust inhibitor 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 10 minutes of treatment, it is 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 had no crystals, the color was uniform, and there was no foreign matter such as spots, and the indoor storage was not rusted for 140 days.

Example 5

[0034] The components are mixed according to the following parts by weight (total parts by weight: 200 parts): 5 parts of soda ash, 3 parts of trisodium phosphate, 3 parts of triethanolamine, 4 parts of water-soluble silicone oil, 3 parts of sodium tripolyphosphate, stirring , evenly mixed, formulated as a rust inhibitor.

[0035] Treatment method: Prepare the rust inhibitor 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 10 minutes of treatment, it is dried, usually naturally dried and dried. 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 had no crystals, the color was uniform, and there was no foreign matter such as spots, and the room was stored for 180 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 comprising 200 parts by weight of the following components by weight: 0.2-5 parts of soda ash, 1-3 parts of trisodium phosphate, 0.2-3 parts of triethanolamine, 0.5-4 parts of water-soluble silicone oil, 1-3 parts of sodium tripolyphosphate and the balance of water.

[Claim 2] The rust inhibitor according to claim 1, wherein the soda ash is 2-4 parts by weight

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

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

[Claim 5] The rust inhibitor according to claim 1, wherein the water-soluble silicone oil has a weight fraction of 2-3 parts.

[Claim 6] The rust inhibitor according to claim 1, wherein the sodium tripolyphosphate is in an amount of from 2 to 3 parts by weight.

[Claim 7] The rust inhibitor according to claim 1, wherein the rust inhibitor is formulated to have a pH of 9-11.

[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 2-20. 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.