Surfactant for removing oil on surfaces of aluminum and aluminum alloy and application of surfactant

Abstract

The invention provides a surfactant for removing oil on the surfaces of aluminum and aluminum alloy. The surfactant comprises C11 ethoxylated alcohol, C12-C14 secondary alcohol ethoxylate, cardanol polyoxyethylene ether, alkyl quaternary ammonium ethoxylate, alkyl diphenyl ether disulfonate and deionized water. The temperature in the aluminum and aluminum alloy material cleaning process is reduced, efficiency is improved, and energy consumption is reduced; and oil and ash are removed, and the corrosivity is measured.

Description

Technical Field

[0001] The present invention relates to surfactants, and particularly to surfactants for degreasing the surfaces of aluminum and aluminum alloys and their applications. Background Art

[0002] Compared with traditional steel parts, aluminum materials and aluminum alloy-related materials can effectively reduce weight by 20 - 30% under the same performance conditions, and are one of the materials that are currently the focus of global lightweighting. Subsequently, the processing and manufacturing of a large number of aluminum products will involve the consumption of a large amount of supporting chemicals. This project selects the surface pretreatment raw materials of aluminum and aluminum alloy-related products as the research content, aiming to cooperate in solving the pretreatment-related chemicals required for the processing of die-cast aluminum or profile aluminum parts during the vehicle body lightweighting process.

[0003] The production and manufacturing process of aluminum products is basically similar to that of iron parts, and both require degreasing - passivation and then subsequent heavy anti-corrosion processes. During the automobile manufacturing process, traditional large structural parts, such as the vehicle body, etc., can be directly passivated after sandblasting, but small and complex-structured parts can only be cleaned by chemical degreasing methods.

[0004] For traditional fatty alcohol polyoxyethylene ethers and isomeric alcohol ethers, although these two surfactants are used as alternative products to alkylphenol polyoxyethylene ethers in various industries, their degreasing performance and durability are still inferior to those of alkylphenol polyoxyethylene ethers. The new plant phenol-based non-ionic surfactants have poor versatility for oil stains and cannot meet the cleaning requirements for all types of processing oils; anionic systems such as sodium dodecyl sulfate have poor water washability, and anionic surfactants have poor resistance to hard water and are prone to precipitate in the bath solution, adhere to the workpiece, and cause secondary pollution.

[0005] The purpose of this project is to develop a brand-new surfactant combination through compounding, which can achieve good degreasing and dirt removal effects in a neutral or weakly alkaline environment, has a better degreasing effect than conventional alkylphenol polyoxyethylene ethers, is safe, environmentally friendly, more energy-efficient, and has no corrosion to aluminum and aluminum alloy substrates. Meeting the current market demand, it will surely have a broad market prospect. Summary of the Invention

[0006] To solve the above problems, the present invention discloses a surfactant for degreasing the surfaces of aluminum and aluminum alloys and its application, which can reduce the temperature during the cleaning process of aluminum and aluminum alloy materials, improve efficiency, save energy consumption; and has functions of degreasing and removing ash, and measuring corrosion.

[0007] The surfactant for degreasing the surfaces of aluminum and aluminum alloys includes C11 ethoxylated alcohol, C12 - C14 secondary alcohol ethoxylate, cardanol polyoxyethylene ether, alkyl quaternary ammonium ethoxylate, alkyl diphenyl ether disulfonate, and deionized water.

[0008] Further, by weight, the C11 ethoxylated alcohol is 10% - 15%, the C12 - C14 secondary alcohol ethoxylate is 30% - 40%, the cardanol polyoxyethylene ether is 5% - 10%, the alkyl quaternary ammonium ethoxylate is 25% - 35%, the alkyl diphenyl ether disulfonate is 1% - 3%, and the deionized water is 1% - 7%.

[0009] Further, the C11 ethoxylated alcohol is 13%.

[0010] Further, the C11 ethoxylated alcohol is 35%.

[0011] Further, the C12 - C14 secondary alcohol ethoxylate is 30% - 40%, Further, the cardanol polyoxyethylene ether is 5% - 10%, Further, the alkyl quaternary ammonium ethoxylate is 10%.

[0012] Further, the alkyl diphenyl ether disulfonate is 30%.

[0013] Further, the deionized water is 5%.

[0014] Advantages of the present invention: 1. For the traditional alkylphenol polyoxyethylene ether system, although it has excellent degreasing power and the highest cost performance, it is easy to gel and not environmentally friendly. The raw materials used select environmentally friendly surfactants from natural sources, with low odor, easy degradation, no alkylphenol polyoxyethylene ether, and are green and environmentally friendly.

[0015] 2. The surfactant has a fast dissolution rate and can achieve a high oil removal rate during medium - low temperature soaking, effectively reducing production energy consumption.

[0016] 3. The new surfactant has good durability and a lower addition amount compared to conventional surfactants.

[0017] 4. The raw materials used do not corrode the surface of aluminum and its alloys. Embodiment

[0018] The following further clarifies the present invention in combination with specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions, and the words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0019] A degreasing surfactant for aluminum alloy in this embodiment includes C11 ethoxylated alcohol, C12 - C14 secondary alcohol ethoxylate, cardanol polyoxyethylene ether, alkyl quaternary ammonium ethoxylate, alkyl diphenyl ether disulfonate and deionized water.

[0020] The C11 ethoxylated alcohol is 13%; the C12-C14 secondary alcohol ethoxylate is 35%; the cardanol polyoxyethylene ether The alkyl quaternary ammonium ethoxylate is 10%; the alkyl diphenyl ether disulfonate is 30%; the deionized water is 5%.

[0021] The manufacturer of the C11 ethoxylated alcohol is Sasol, and the production of the alkyl diphenyl ether disulfonate is Seco, the cardanol polyoxyethylene ether.

[0022] A degreasing surfactant for aluminum alloy produced in this example has a low odor and no pungent smell, and has little mild irritation to human skin; raw materials that corrode the aluminum surface are screened through an aluminum corrosion experiment, and this surfactant will not cause problems such as yellowing, blackening, and dullness on the aluminum surface; The surfactant has a fast dissolution rate at low temperatures (above 0°C), is not easy to gel, has a fast degreasing rate, a high washing rate, and effectively reduces the energy consumption during the process of using the surfactant in the cleaning agent and during the end-use process; The surfactant developed in this project is easy to rinse, reduces the amount of rinsing water used, and helps the aluminum and aluminum alloy to pass the 36# and 38# dyne pens after cleaning.

[0023] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A surfactant for degreasing the surface of aluminum and aluminum alloys, characterized in that: It includes C11 ethoxylated alcohol, C12-C14 secondary alcohol ethoxylate, cardanol polyoxyethylene ether, alkyl quaternary ammonium ethoxylate, alkyl diphenyl ether disulfonate and deionized water.

2. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 1, characterized in that: By weight, the C11 ethoxylated alcohol is 10%-15%, the C12-C14 secondary alcohol ethoxylate is 30%-40%, the cardanol polyoxyethylene ether is 5%-10%, the alkyl quaternary ammonium ethoxylate is 25%-35%, the alkyl diphenyl ether disulfonate is 1%-3%, and the deionized water is 1%-7%.

3. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, wherein: The C11 ethoxylated alcohol is 13%.

4. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, characterized in that: The C11 ethoxylated alcohol is 35%.

5. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, wherein: The C12-C14 secondary alcohol ethoxylate is 30%-40%.

6. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, characterized in that: The cardanol polyoxyethylene ether is 5%-10%.

7. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, wherein: The alkyl quaternary ammonium ethoxylate is 10%.

8. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, characterized in that: The alkyl diphenyl ether disulfonate is 30%.

9. The surfactant for degreasing the surface of aluminum and aluminum alloys according to claim 2, wherein: The deionized water is 5%.

10. Application of a surfactant for degreasing the surface of aluminum and aluminum alloys, characterized in that: It is applied to surface cleaning in the field of automotive sheet preparation.