Three-electricity system battery tray environment-friendly formation agent and groove matching treatment process

Abstract

The invention discloses the technical field of material surface treatment, and particularly discloses an environment-friendly formation agent for a battery tray of a three-electric system and a groove matching treatment process, the formation agent comprises an agent A and an agent B. The agent A is prepared by mixing and stirring the following components in percentage by weight at normal temperature for 30 minutes: 6-10% of hexafluorozirconic acid, 0.1-1% of aluminum nitrate, 3-8% of nitric acid and the balance of water; and the agent B is prepared by mixing and stirring the following components in percentage by weight at normal temperature for 30 minutes: 0.5-2% of sodium nitrate, 1-6% of sodium nitrate, 2-8% of zinc nitrate and the balance of water. The paint does not contain heavy metals, phosphorus, nickel and other harmful substances, and meets the requirement of environmental protection; and meanwhile, a more compact net-shaped structure is formed on the surface of the product treated by the method, excellent corrosion resistance is achieved, SST is required to be 1000h, and unilateral corrosion is below 2mm.

Description

Technical Field

[0001] The present invention belongs to the technical field of material surface treatment, and particularly relates to an environmentally friendly chemical conversion agent for a battery tray of a three-electric system and a tank preparation treatment process. Background Art

[0002] The three-electric refers to the abbreviation of the battery, motor, and electric control system in new energy vehicles. The existing treatment process for the battery tray of the three-electric system is pre-degreasing → degreasing → water washing → pure water washing → chemical conversion → pure water washing → electrophoresis → powder spraying. Among them, the chemical conversion agent used in the chemical conversion process has the following defects: (1) It contains heavy metals and does not meet the environmental protection requirements; (2) It contains elements such as phosphorus and nickel. Phosphorus-containing wastewater will pollute water bodies, stimulate the massive reproduction of algae and aquatic plants, lead to water eutrophication, and then cause sudden outbreaks of algae and the massive death of aquatic plants, resulting in serious pollution of water bodies; nickel-containing wastewater will pollute the environment, have adverse effects on the growth and reproduction of aquatic organisms, and even cause death in severe cases, and will also endanger human health. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an environmentally friendly chemical conversion agent for a battery tray of a three-electric system and a tank preparation treatment process, aiming to solve the problem that the existing chemical conversion agent contains heavy metals and elements such as phosphorus and nickel and does not meet the environmental protection requirements.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] The present invention provides an environmentally friendly chemical conversion agent for a battery tray of a three-electric system, including Agent A and Agent B. Agent A is prepared by mixing the following components at room temperature and stirring for 30 minutes by weight percentage. Among them, fluoziric acid is 6-10%, aluminum nitrate is 0.1-1%, nitric acid is 3-8%, and the balance is water; Agent B is prepared by mixing the following components at room temperature and stirring for 30 minutes by weight percentage. Among them, silicone resin-containing is 0.5-2%, sodium nitrate is 1-6%, zinc nitrate is 2-8%, and the balance is water.

[0006] Further, Agent A is prepared by mixing 7% fluoziric acid, 0.2% aluminum nitrate, 5% nitric acid, and the balance water at room temperature and stirring for 30 minutes.

[0007] Further, Agent B is prepared by mixing 1.5% silicone resin-containing, 4% sodium nitrate, 5% zinc nitrate, and the balance water at room temperature and stirring for 30 minutes.

[0008] Further, the silicone resin-containing adopts γ-aminopropyltriethoxysilane.

[0009] A tank preparation treatment process for an environmentally friendly chemical conversion agent for a battery tray of a three-electric system includes the following steps:

[0010] S1: First add 80% of pure water into a container;

[0011] S2: Add 1.5% of agent A, stir for 10 min, then add 1% of agent B and stir for 10 min;

[0012] S3: Make up the remaining pure water;

[0013] S4: Adjust the pH to 4.6 with a pH adjuster;

[0014] S5: Treat the workpiece at a temperature of 30 °C for 2.5 min.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention does not contain harmful substances such as heavy metals, phosphorus, nickel, etc., and meets the requirements of environmental protection.

[0017] 2. After being treated by the present invention, a denser network structure is formed on the surface of the product, achieving excellent corrosion resistance. The SST requirement is 1000 h, and the unilateral corrosion is less than 2 mm.

[0018] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Specific embodiments

[0019] The following illustrates the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention schematically. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0020] Among them, the embodiments are only used for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the embodiments will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the embodiments may be omitted. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or arrangements discussed.

[0021] An environmentally friendly forming agent for the battery tray of the three-electric system, comprising Agent A and Agent B. Agent A is prepared by mixing the following components at room temperature and stirring for 30 minutes by weight percentage. Among them, zirconium fluozirconate is 6-10%, aluminum nitrate is 0.1-1%, nitric acid is 3-8%, and the balance is water. Agent B is prepared by mixing the following components at room temperature and stirring for 30 minutes by weight percentage. Among them, silicone resin is 0.5-2%, sodium nitrate is 1-6%, zinc nitrate is 2-8%, and the balance is water.

[0022] The above-mentioned forming agent is prepared for the tank according to 1.5% of Agent A and 1% of Agent B. The steps for processing the workpiece in the tank are as follows:

[0023] S1: First add 80% of pure water into the container;

[0024] S2: Add 1.5% of Agent A and stir for 10 minutes, then add 1% of Agent B and stir for 10 minutes;

[0025] S3: Make up the remaining pure water;

[0026] S4: Use a PH adjuster to adjust the PH to 4.6;

[0027] S5: Process the workpiece at a temperature of 30°C for 2.5 minutes.

[0028] The forming agent of the present invention does not contain heavy metals, phosphorus, nickel and other elements, meeting the environmental protection requirements. At the same time, the forming agent uses silicone resin and a supporting coating film. The silicone resin and the coating film crosslink to form a denser network structure, achieving excellent corrosion resistance. The SST requirement is 1000 hours, and the unilateral corrosion is less than 2 mm.

[0029] Examples

[0030] An environmentally friendly forming agent for the battery tray of the three-electric system, comprising Agent A and Agent B. Agent A is prepared by mixing 7% of zirconium fluozirconate, 0.2% of aluminum nitrate, 5% of nitric acid, and the balance of water at room temperature and stirring for 30 minutes. Agent B is prepared by mixing 1.5% of γ-aminopropyltriethoxysilane, 4% of sodium nitrate, 5% of zinc nitrate, and the balance of water at room temperature and stirring for 30 minutes.

[0031] Comparative Examples

[0032] The existing forming agent is prepared by mixing 5% of zinc oxide, 1% of nickel nitrate, 1% of manganese nitrate, 38% of phosphoric acid, 5% of nitric acid, 1% of fluosilicic acid, and 49% of water at room temperature and stirring for 30 minutes.

[0033] The forming agents obtained in the examples and comparative examples are compared according to the same tank preparation process as above, and the data results are as follows in the table:

[0034]

[0035] From the comparison of the obtained data, it is not difficult to see that the formation agent of the present invention does not contain phosphorus, meets the environmental protection requirements, and at the same time, a denser protective film is formed on the surface of the product treated with the formation agent of the present invention, and the corrosion resistance is stronger.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An environmentally friendly chemical conversion agent for the battery tray of a three-electric system, characterized in that, It includes Agent A and Agent B. Agent A is prepared by mixing the following components at room temperature and stirring for 30 min by weight percentage. Among them, zirconium fluoroboric acid is 6 - 10%, aluminum nitrate is 0.1 - 1%, nitric acid is 3 - 8%, and the balance is water; Agent B is prepared by mixing the following components at room temperature and stirring for 30 min by weight percentage. Among them, silicone resin is 0.5 - 2%, sodium nitrate is 1 - 6%, zinc nitrate is 2 - 8%, and the balance is water.

2. The environmentally friendly chemical conversion agent for the battery tray of the three-electric system according to claim 1, characterized in that Agent A is prepared by mixing 7% zirconium fluoroboric acid, 0.2% aluminum nitrate, 5% nitric acid, and the balance being water at room temperature and stirring for 30 min.

3. The environmentally friendly chemical conversion agent for the battery tray of the three-electric system according to claim 1, characterized in that, Agent B is prepared by mixing 1.5% silicone resin, 4% sodium nitrate, 5% zinc nitrate, and the balance being water at room temperature and stirring for 30 min.

4. The environmentally friendly chemical conversion agent for the battery tray of the three-electric system according to claim 1, wherein The silicone resin used is γ - aminoethylaminopropyltrimethoxysilane.

5. A tank preparation treatment process for the environmentally friendly chemical conversion agent of the battery tray of the three-electric system according to any one of claims 1-4, characterized in that, It includes the following steps: S1: First add 80% of pure water into the container; S2: Add 1.5% of Agent A and stir for 10 min, then add 1% of Agent B and stir for 10 min; S3: Make up the remaining pure water; S4: Adjust the pH to 4.6 with a pH adjuster; S5: Treat the workpiece at a temperature of 30°C for 2.5 min.

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