Aluminum alloy surface brightening cleaning agent and preparation method thereof

Abstract

The invention discloses a bright cleaning agent for an aluminum alloy surface. The bright cleaning agent comprises HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co (NH2) 2 and I DA. The preparation method of the aluminum alloy surface brightening cleaning agent is characterized by comprising the following steps: S1, measuring corresponding materials; s2, preparing a first solution: taking purified water, sequentially adding HNO3, NH4HF2, HEDP, lactic acid, NaNO3 and Co (NH2) 2, and dissolving to obtain the first solution; s3, preparing a second solution: taking purified water, adding hydroxymethyl cellulose, and dissolving to obtain the second solution; s3, solution fusion: slowly adding the second solution into the first solution, and dropwise adding I DA after the injection is completed to form a fusion solution; and S4, obtaining a final solution: supplementing purified water to the fused solution to 1 liter, and controlling the temperature to room temperature for use. According to the invention, different chemical agents are ingeniously matched, so that the problems of high acid concentration, heavy metal ion containing, yellow smoke generation and the like in the existing bright cleaning system are ingeniously solved, and the progress of the whole treatment process is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy surface cleaning, and in particular to an aluminum alloy surface bright cleaning agent and a preparation method thereof. Background Art

[0002] Aluminum alloy is one of the most commonly used lightweight structural materials. Aluminum and aluminum alloys are widely used in automobile, electronics, aerospace and other fields due to their superior deformation, processing, corrosion resistance, good mechanical properties and electronic properties. After adding Cu, Mn, Si, Mg, Zn and other elements to pure aluminum, many grades of aluminum alloy systems can be formed to better meet the requirements of different application fields. However, the addition of Cu, Mn, Si, Mg and other elements makes the surface treatment of aluminum alloys face many difficulties. Among them, bright cleaning agent, which is one of the basic pre-treatment processes, is often difficult to obtain a clean and bright surface due to the different contents of the above elements. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an aluminum alloy surface bright cleaning agent and a preparation method thereof. The ingenious combination of different chemical agents ingeniously solves the problems of high acid concentration, heavy metal ions, yellow smoke, etc. in the existing bright cleaning system, thereby promoting the progress of the entire treatment process.

[0004] The present invention also provides the above-mentioned aluminum alloy surface bright cleaning agent and a preparation method thereof, comprising: HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co(NH2)2, and IDA.

[0005] According to the aluminum alloy surface bright cleaning agent provided by the present invention, the HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co(NH2)2, and IDA are respectively: 30-50ml, 10-20g, 10-15g, 5-10ml, 2-5g, 5-7g, 3-5g, and 5-10ml.

[0006] According to the aluminum alloy surface bright cleaning agent provided by the present invention, the HNO3 and NH4HF2 form a corrosion and dissolution cleaning combination, and the IDA improves the cleaning efficiency and effect, and can also multiply the efficacy of the above combination.

[0007] According to the aluminum alloy surface bright cleaning agent provided by the present invention, the HEDP and lactic acid have a chelating effect on the one hand, which can chelate the Cu and Mn ions that are not easily dissolved to promote their dissolution; on the other hand, they have the effect of forming a temporary organic protective film and can polish the surface of the metal substrate when used in combination with HNO3 and NH4HF2.

[0008] According to the aluminum alloy surface bright cleaning agent provided by the present invention, the hydroxymethyl cellulose and HEDP have a scale inhibition effect so that the insoluble compounds formed in the pickling are not easy to be deposited on the surface of the base metal.

[0009] A method for preparing a bright cleaning agent for aluminum alloy surface comprises the following steps:

[0010] S1. Measure the corresponding materials: measure the corresponding liquid materials with a measuring cylinder, and weigh the solid materials with an electronic scale or balance;

[0011] S2. Preparation of a first solution: Take 500 ml of pure water, add HNO3, NH4HF2, HEDP, lactic acid, NaNO3, Co(NH2)2 in sequence, stir thoroughly to dissolve all the materials, thereby obtaining a first solution;

[0012] S3. Prepare a second solution: Take 100 ml of purified water, add hydroxymethyl cellulose, stir well to dissolve, thereby obtaining a second solution;

[0013] S3. Fusion solution: Under stirring, the second solution is slowly added to the first solution. After the addition is completed, IDA is added dropwise to form a fusion solution;

[0014] S4. Final solution: Add purified water to the fusion solution to 1 liter, control the temperature to room temperature, and it is ready for use.

[0015] Beneficial Effects

[0016] The present invention cleverly solves the problems of high acid concentration, heavy metal ions, yellow smoke and the like in the existing bright cleaning system by cleverly matching different chemical agents, thereby promoting the progress of the entire treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 The present invention is a schematic flow chart of the preparation method of the aluminum alloy surface bright cleaning agent. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0020] Reference Figure 1The embodiment of the present invention provides an aluminum alloy surface bright cleaning agent and a preparation method thereof, which includes: HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co(NH2)2, and IDA.

[0021] Further, HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co(NH2)2, and IDA are: 30-50ml, 10-20g, 10-15g, 5-10ml, 2-5g, 5-7g, 3-5g, and 5-10ml respectively.

[0022] HNO3 and NH4HF2 form a corrosion and dissolution cleaning combination

[0023] HEDP and lactic acid: On the one hand, they have a chelating effect, which can chelate the insoluble Cu and Mn ions to promote their dissolution. On the other hand, they can form a temporary organic protective film. When used in combination with HNO3 and NH4HF2, they can polish the surface of the metal substrate.

[0024] NaNO 3： It has the function of corrosion inhibition and corrosion balance, making the surface finish of the cleaning surface better.

[0025] Co(NH2) 2： It has the function of inhibiting NOx oxides from forming yellow smoke and stabilizing the liquid system

[0026] Hydroxymethyl cellulose and HEDP: have a scale-inhibiting effect, making it difficult for the insoluble compounds formed during pickling to deposit on the surface of the base metal, thus improving the cleaning efficiency and effect.

[0027] IDA: It is a quaternary ammonium surfactant. On the one hand, it improves the efficiency and effect of cleaning. On the other hand, it can multiply the efficacy of the above combination and provide the finishing touch.

[0028] The preparation method of the aluminum alloy surface bright cleaning agent of the embodiment comprises the following steps:

[0029] S1. Measure the corresponding materials: measure the corresponding liquid materials with a measuring cylinder, and weigh the solid materials with an electronic scale or balance;

[0030] S2. Prepare the first solution: Take 500ml of pure water and add HNO3 、 NH4 H F2 、 HEDP, lactic acid, NaNO3 、 Co(NH2 ) 2 ， After sufficient stirring, all the materials are dissolved, thereby obtaining a first solution;

[0031] S3. Prepare a second solution: Take 100 ml of purified water, add hydroxymethyl cellulose, stir well to dissolve, thereby obtaining a second solution;

[0032] S3. Fusion solution: Under stirring, the second solution is slowly added to the first solution. After the addition is completed, IDA is added dropwise to form a fusion solution;

[0033] S4. Final solution: Add purified water to the fusion solution to 1 liter, control the temperature to room temperature, and it is ready for use.

[0034] The embodiments of the present invention are described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A bright cleaning agent for aluminum alloy surface, characterized in that: include: HNO3, NH4HF2, HEDP, lactic acid, hydroxymethylcellulose, NaNO3, Co(NH2)2, IDA.

2. The aluminum alloy surface bright cleaning agent according to claim 1, characterized in that: The HNO3, NH4HF2, HEDP, lactic acid, hydroxymethyl cellulose, NaNO3, Co(NH2)2, and IDA are respectively: 30-50ml, 10-20g, 10-15g, 5-10ml, 2-5g, 5-7g, 3-5g, and 5-10ml.

3. The aluminum alloy surface bright cleaning agent according to claim 1, characterized in that: The HNO3 and NH4HF2 form a corrosion and dissolution cleaning combination, and the IDA improves the cleaning efficiency and effect, and can also multiply the efficacy of the above combination.

4. The aluminum alloy surface bright cleaning agent according to claim 1, characterized in that: The HEDP and lactic acid have a chelating effect on one hand, which can chelate the Cu and Mn ions which are not easily dissolved and promote their dissolution; on the other hand, they have a function of forming a temporary organic protective film, and when used in combination with HNO3 and NH4HF2, they have a function of polishing the surface of the metal substrate.

5. The aluminum alloy surface bright cleaning agent according to claim 1, characterized in that: The hydroxymethyl cellulose and HEDP have a scale inhibition effect, so that the insoluble compounds formed during pickling are not easy to deposit on the surface of the base metal.

6. A method for preparing a bright cleaning agent for aluminum alloy surface, characterized in that: The following steps are involved: S1. Measure the corresponding materials: measure the corresponding liquid materials with a measuring cylinder, and weigh the solid materials with an electronic scale or balance; S2. Preparation of a first solution: Take 500 ml of pure water, sequentially add HNO3, NH4HF2, HEDP, lactic acid, NaNO3, Co(NH2)2, stir thoroughly until all the materials are dissolved, thereby obtaining a first solution; S3. Prepare a second solution: Take 100 ml of purified water, add hydroxymethyl cellulose, stir well to dissolve, thereby obtaining a second solution; S3. Fusion solution: Under stirring, the second solution is slowly added to the first solution. After the addition is completed, IDA is added dropwise to form a fusion solution; S4. Final solution: Add purified water to the fusion solution to 1 liter, control the temperature to room temperature, and it is ready for use.

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