Cleaning agent and electronic equipment

Abstract

The present invention provides a cleaning agent, which comprises: a first component, which comprises at least one of sorbitan monolaurate and sorbitan monopalmitate, and coconut oil fatty acid diethanolamide, and a second component, which comprises at least one of sorbitan monolaurate and sorbitan monopalmitate, and coconut oil fatty acid diethanolamide; the second component comprises at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecyl benzene sulfonate and lauryl sodium sulfate; and the third component comprises at least one of benzotriazole and imidazoline. The invention further provides the electronic equipment, the electronic equipment comprises the metal shell, and the metal shell is treated by the cleaning agent.

Description

Technical Field

[0001] The present disclosure relates to a cleaning agent and an electronic device. Background Art

[0002] In order to make the metal of the shell material of some devices have a more metallic texture, polishing is usually used in the industry to obtain a high-gloss metal appearance effect.

[0003] However, the polished metal surface often has a large amount of polishing paste and residual ash attached to it. Although conventional cleaning agents can remove surface adsorbents such as wax, due to the high activity after high-gloss polishing, it often causes the material surface to oxidize and lose its gloss, making it impossible to achieve a high-gloss effect. Summary of the invention

[0004] One aspect of the present disclosure provides a cleaning agent, comprising: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; and a third component, including at least one of benzotriazole and imidazoline.

[0005] Optionally, the weight ratio of at least one of the above-mentioned sorbitan laurate and sorbitan monopalmitate to the above-mentioned coconut fatty acid diethanolamide is 1:(1.25~3).

[0006] Optionally, the content of the first component is 15 to 38 parts by weight.

[0007] Optionally, the content of the second component is 2 to 5 parts by weight.

[0008] Optionally, the content of the third component is 0.5-2 parts by weight.

[0009] Optionally, the first component further includes at least one of lauryl alcohol polyoxyethylene ether and alkyl glucoside.

[0010] Optionally, the cleaning agent further comprises at least one of a complexing agent, a penetrant and a co-solvent.

[0011] Optionally, when the cleaning agent contains the complexing agent, the complexing agent includes at least one of trisodium citrate, sodium gluconate and triethanolamine.

[0012] Optionally, when the cleaning agent contains the penetrant, the penetrant includes at least one of N-methylpyrrolidone and N-methyl-2-pyrrolidone.

[0013] Optionally, when the cleaning agent contains the co-solvent, the co-solvent includes at least one of dipropylene glycol monobutyl ether, diethylene glycol butyl ether and ethylene glycol monobutyl ether.

[0014] Optionally, when the cleaning agent contains the complexing agent, the content of the complexing agent is 1 to 23 parts by weight.

[0015] Optionally, when the cleaning agent contains the penetrant, the content of the penetrant is 1 to 5 parts by weight.

[0016] Optionally, when the cleaning agent contains the co-solvent, the content of the co-solvent is 8 to 12 parts by weight.

[0017] Optionally, the first component includes sorbitan laurate, coconut fatty acid diethanolamide, lauryl alcohol polyoxyethylene ether, and alkyl glucoside; the second component includes sodium dodecyl diphenyl ether disulfonate; the third component includes benzotriazole; and the cleaning agent also includes trisodium citrate, sodium gluconate, triethanolamine, N-methylpyrrolidone, and dipropylene glycol monobutyl ether.

[0018] Optionally, the content of the above-mentioned sorbitan laurate is 5~8 weight parts; the content of the above-mentioned coconut fatty acid diethanolamide is 10~15 weight parts; the content of the above-mentioned lauryl alcohol polyoxyethylene ether is 8~10 weight parts; the content of the above-mentioned alkyl glucoside is 3~5 weight parts; the content of the above-mentioned sodium dodecyl diphenyl ether disulfonate is 2~5 weight parts; the content of the above-mentioned trisodium citrate is 5~10 weight parts; the content of the above-mentioned sodium gluconate is 1~5 weight parts; the content of the above-mentioned triethanolamine is 5~8 weight parts; the content of the above-mentioned N-methylpyrrolidone is 1~5 weight parts; the content of the above-mentioned benzotriazole is 0.5~2 weight parts; the content of the above-mentioned dipropylene glycol monobutyl ether is 8~12 weight parts.

[0019] Another aspect of the present disclosure provides a method for cleaning a metal part, comprising: immersing the metal part in a cleaning agent to obtain the metal part after immersion; wherein the cleaning agent comprises: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; a third component, including at least one of benzotriazole and imidazoline.

[0020] Optionally, the metal part is a polished magnesium alloy part made by a semi-solid die-casting process.

[0021] Optionally, the pH of one soak is 10.0-11.5.

[0022] Optionally, the temperature of one immersion is 65-75°C.

[0023] Optionally, the immersion time is 3 to 5 minutes.

[0024] Optionally, the above-mentioned metal parts cleaning method further comprises: spraying and second-immersing the metal polished parts after the first immersion in sequence to obtain the cleaned metal parts.

[0025] Optionally, the spraying temperature is 50-60°C.

[0026] Optionally, the spraying time is 20 to 40 seconds.

[0027] Optionally, the temperature of the secondary immersion is 50-60°C.

[0028] Optionally, the secondary immersion time is 60 to 90 seconds.

[0029] Another aspect of the present disclosure provides an electronic device, including a metal shell, which is treated with a cleaning agent; wherein the cleaning agent includes: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; a third component, including at least one of benzotriazole and imidazoline. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] For a more complete understanding of the present disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A physical picture of the magnesium alloy highlight polished part after cleaning in Example 1 is shown;

[0032] Figure 2 A physical picture of the magnesium alloy highlight polished part after cleaning in Example 2 is shown;

[0033] Figure 3 A physical picture of the magnesium alloy highlight polished part after cleaning in Example 3 is shown;

[0034] Figure 4 A physical picture of the magnesium alloy highlight polished part after cleaning in Comparative Example 1 is shown;

[0035] Figure 5 A physical picture of the magnesium alloy highlight polished part after cleaning in Comparative Example 2 is shown;

[0036] Figure 6 A physical picture of the magnesium alloy highlight polished part after cleaning in Comparative Example 3 is shown;

[0037] Figure 7 A physical picture of the magnesium alloy highlight polished part after cleaning in Comparative Example 4 is shown; and

[0038] Figure 8 A physical picture of the magnesium alloy highlight polished part after cleaning in Comparative Example 5 is shown. DETAILED DESCRIPTION

[0039] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0040] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0041] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0042] In order to make the metal shell of electronic equipment have a more metallic texture, polishing is usually used in the industry to obtain a high-gloss metal appearance. The surface of the polished metal parts often adheres to a large amount of polishing paste and residual ash. Among them, the polishing paste may include binders such as stearic acid, palmitic acid, rosin, abrasives such as aluminum oxide powder, chromium oxide green, brown corundum powder, feldspar powder, quartz powder, lubricants such as paraffin, vaseline, lanolin, beeswax, and other additives. Residual ash refers to the inorganic matter remaining after the polishing paste is burned at high temperature, which may include metal oxides such as aluminum oxide and chromium oxide, inorganic salts such as sulfates, phosphates, carbonates of potassium, sodium, calcium, magnesium, etc., and other inorganic substances such as silicon dioxide.

[0043] Although conventional cleaning agents can effectively remove surface adsorbents such as wax, the high activity of metal parts after high-gloss polishing often causes oxidation and loss of gloss on the material surface, making it impossible to achieve a high-gloss effect.

[0044] In addition, due to the advantages of product quality, production efficiency, material utilization and cost, the semi-solid die-casting process can be applied to the preparation of metal shells of electronic equipment. The semi-solid die-casting process is a metal forming process in which the metal is heated to a semi-solid state to form a semi-solid slurry composed of solid particles uniformly suspended in liquid metal, and then the slurry is injected into the die-casting mold cavity under a certain pressure, and the metal is filled and solidified to obtain a casting with a specific shape and performance.

[0045] The inventors of this application have found that in the semi-solid die-casting process, due to the presence of solid-liquid phases during the solidification process, some microscopic defects or component segregation may exist at the grain boundaries. These microscopic defects and component segregation will be exposed after polishing and become active sites for oxidation reactions, making it easier for oxygen to react with the metal alloy and accelerate the oxidation process. Therefore, compared with processes such as extrusion or stamping, for magnesium alloy parts made by semi-solid die-casting, the surface oxidation and gloss loss is more serious after using conventional cleaning agents to remove surface adsorbents such as wax.

[0046] Therefore, it is very important to develop an efficient and non-corrosive cleaning agent suitable for metal parts, especially magnesium alloy parts made by semi-solid die-casting process, for high-gloss polishing and cleaning.

[0047] In view of this, one aspect of the present disclosure provides a cleaning agent, which includes a first component, a second component and a third component. The first component includes at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; the second component includes at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; and the third component includes at least one of benzotriazole and imidazoline.

[0048] According to the embodiments of the present disclosure, by selecting a specific first component, a second component and a third component, the three work synergistically to solve the problem of surface oxidation and gloss loss during the cleaning process of metal parts that have been subjected to highlight polishing, especially magnesium alloy parts made by a semi-solid die-casting process. The surface of the metal highlight polished parts treated with the cleaning agent will not turn white, discolor or darken, thereby ensuring the metallic luster of the highlight surface of the metal parts. At the same time, through the compounding of the first component, the second component and the third component, the solubility and processing capacity of the cleaning agent for polishing wax are improved, and there is no wax residue on the surface of the metal highlight polished parts treated with the cleaning agent, which will not affect subsequent processing.

[0049] The cleaning agent provided in the embodiment of the present disclosure can not only effectively clean the high-gloss surface of the metal parts, but also maintain the metallic luster of the high-gloss surface of the metal parts. The metal parts cleaned by the cleaning agent provided in the embodiment of the present disclosure can maintain a certain anti-rust effect even in the subsequent humid storage environment, which is convenient for the turnover of the semi-finished metal parts.

[0050] In some embodiments of the present disclosure, the first component may include sorbitan laurate and coconut fatty acid diethanolamide. The first component may also include sorbitan monopalmitate and coconut fatty acid diethanolamide. The first component may also include sorbitan laurate, sorbitan monopalmitate and coconut fatty acid diethanolamide.

[0051] In some embodiments of the present disclosure, the second component may include one of sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate, that is, the second component may include sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate or sodium dodecyl sulfate. The second component may also include two of sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate, that is, the second component may include sodium dodecyl diphenyl oxide disulfonate and sodium dodecyl benzene sulfonate, the second component may include sodium dodecyl diphenyl oxide disulfonate and sodium dodecyl sulfate, and the second component may include sodium dodecyl benzene sulfonate and sodium dodecyl sulfate. The second component may also include sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.

[0052] In some embodiments of the present disclosure, the third component may include benzotriazole. The third component may also include imidazoline. The third component may also include benzotriazole and imidazoline.

[0053] Wherein, the chemical formula of sorbitan laurate can be C 18 H 34 O 6 , CAS number is 1338-39-2, and its structure is shown in formula (1).

[0054] Formula (1).

[0055] The chemical formula of sorbitan monopalmitate can be C 22 H 42 O 6 , CAS number is 26266-57-9, and its structure is shown in formula (2).

[0056] Formula (2).

[0057] The chemical formula of coconut fatty acid diethanolamide can be C 13 H 13 C l8NO 4 , CAS No. 68603-42-9, and its structure is shown in formula (3).

[0058] Formula (3).

[0059] The chemical formula of sodium dodecyl diphenyl ether disulfonate can be C 24 H 32 O 7 S 2 Na 2 , CAS number is 7575-62-4, and its structure is shown in formula (4).

[0060] Formula (4).

[0061] The chemical formula of sodium dodecylbenzene sulfonate can be C 18 H 29 NaO 3 S, CAS No. 25155-30-0, has a structure as shown in formula (5).

[0062] Formula (5).

[0063] The chemical formula of sodium dodecyl sulfate can be C 12 H 25 NaO 4 S, CAS No. 151-21-3, its structure is shown in formula (6).

[0064] Formula (6).

[0065] The chemical formula of benzotriazole can be C 6 H 5 N 3 , CAS number is 95-14-7, and its structure is shown in formula (7).

[0066] Formula (7).

[0067] The chemical formula of imidazoline can be C 3 H 8 N 2 , CAS number is 504-74-5, and its structure is shown in formula (8).

[0068] Formula (8).

[0069] According to an embodiment of the present disclosure, the weight ratio of at least one of sorbitan laurate and sorbitan monopalmitate to coconut fatty acid diethanolamide may be 1:(1.25-3). Exemplarily, the weight ratio of at least one of sorbitan laurate and sorbitan monopalmitate to coconut fatty acid diethanolamide may be 1:1.25, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2.0, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, 1:2.6, 1:2.7, 1:2.8, 1:2.9, 1:3.0 or a range consisting of any two of the above values. Among them, at least one of sorbitan laurate and sorbitan monopalmitate can be sorbitan laurate, sorbitan monopalmitate, or sorbitan laurate and sorbitan monopalmitate. The weight ratio of at least one of sorbitan laurate and sorbitan monopalmitate to coconut fatty acid diethanolamide is within the above range, which can better maintain the metallic luster of the high-gloss surface of the metal part.

[0070] According to an embodiment of the present disclosure, the content of the first component may be 15 to 38 parts by weight. For example, the content of the first component may be 15 parts by weight, 16 parts by weight, 18 parts by weight, 20 parts by weight, 21 parts by weight, 23 parts by weight, 25 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, 35 parts by weight, 37 parts by weight, 38 parts by weight, or a range consisting of any two of the above values.

[0071] For example, the first component may include sorbitan laurate and coconut fatty acid diethanolamide. The content of sorbitan laurate may be 5-8 parts by weight, and the weight of coconut fatty acid diethanolamide may be 10-15 parts by weight.

[0072] According to an embodiment of the present disclosure, the content of the second component may be 2 to 5 parts by weight. For example, the content of the second component may be 2.0 parts by weight, 2.5 parts by weight, 3.0 parts by weight, 3.5 parts by weight, 4.0 parts by weight, 4.5 parts by weight, 5.0 parts by weight, or a range consisting of any two of the above values.

[0073] According to an embodiment of the present disclosure, the content of the third component may be 0.5 to 2 parts by weight. For example, the content of the third component may be 0.5 parts by weight, 0.8 parts by weight, 1.0 parts by weight, 1.2 parts by weight, 1.5 parts by weight, 1.8 parts by weight, 2.0 parts by weight, or a range consisting of any two of the above values.

[0074] According to the embodiments of the present disclosure, the appropriate contents of the first component, the second component and the third component can further effectively clean the highlight surface of the metal part while maintaining the metallic luster of the highlight surface of the metal part.

[0075] According to an embodiment of the present disclosure, the first component may also include at least one of lauryl alcohol polyoxyethylene ether and alkyl glucoside. Exemplarily, the first component may also include lauryl alcohol polyoxyethylene ether. The first component may also include alkyl glucoside. The first component also includes lauryl alcohol polyoxyethylene ether and alkyl glucoside. Including at least one of lauryl alcohol polyoxyethylene ether and alkyl glucoside in the first component can further protect the high-gloss surface of the metal part. In addition, lauryl alcohol polyoxyethylene ether has good emulsifying properties and solubilizing effects, which improves the cleaning effect of the cleaning agent. Alkyl glucoside has good emulsifying properties, which improves the cleaning effect of the cleaning agent; it has good compatibility with other cleaning agent components and can synergize with other components.

[0076] Wherein, the chemical formula of lauryl alcohol polyoxyethylene ether can be (C 2 H 4 O) n C 12 H 26 O, CAS No. 9002-92-0, and its structure is shown in formula (9).

[0077] Formula (9).

[0078] According to an embodiment of the present disclosure, the alkyl glucoside is generated by dehydrating the hemiacetal hydroxyl group of glucose and the hydroxyl group of fatty alcohol under acid catalysis. Optionally, the alkyl glucoside may include at least one of dodecyl glucoside and decyl glucoside.

[0079] Wherein, the chemical formula of dodecyl glucoside can be C 18 H 36 O 6 , CAS No. 110615-47-9, and its structure is shown in formula (10).

[0080] Formula (10).

[0081] The chemical formula of decyl glucoside can be C 16 H 32 O 6 , CAS number is 54549-25-6, and its structure is shown in formula (11).

[0082] Formula (11).

[0083] In some embodiments of the present disclosure, the content of lauryl alcohol polyoxyethylene ether can be 8 to 10 parts by weight. For example, the content of lauryl alcohol polyoxyethylene ether can be 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, or a range consisting of any two of the above values.

[0084] In some embodiments of the present disclosure, the content of alkyl glucoside may be 3 to 5 parts by weight. For example, the content of alkyl glucoside may be 3 parts by weight, 3.5 parts by weight, 4.0 parts by weight, 4.5 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0085] According to an embodiment of the present disclosure, the cleaning agent may further include at least one of a complexing agent, a penetrant and a solubilizing agent. Exemplarily, the cleaning agent may further include one of a complexing agent, a penetrant and a solubilizing agent, that is, the cleaning agent may further include a complexing agent, the cleaning agent may further include a penetrant, and the cleaning agent may further include a solubilizing agent. The cleaning agent may further include two of a complexing agent, a penetrant and a solubilizing agent, that is, the cleaning agent may further include a complexing agent and a penetrant, the cleaning agent may further include a complexing agent and a solubilizing agent, and the cleaning agent may further include a penetrant and a solubilizing agent. The cleaning agent may further include a complexing agent, a penetrant and a solubilizing agent.

[0086] According to the embodiments of the present disclosure, the complexing agent can bind hydrogen ions in water and can also complex metal ions, effectively dissolve inorganic salts in the polishing wax, and reduce the risk of re-deposition of impurities on the surface after cleaning. The penetrant is conducive to the penetration of other components in the cleaning agent, improving the cleaning efficiency of the cleaning agent. The co-solvent can improve the solubility of the cleaning agent for insoluble components and improve the cleaning effect of the cleaning agent.

[0087] According to an embodiment of the present disclosure, in the case where a complexing agent is included in the cleaning agent, the complexing agent may include at least one of trisodium citrate, sodium gluconate and triethanolamine. Exemplarily, the complexing agent may include one of trisodium citrate, sodium gluconate and triethanolamine, that is, the complexing agent may include trisodium citrate, the complexing agent may also include sodium gluconate, and the complexing agent may also include triethanolamine. The complexing agent may include two of trisodium citrate, sodium gluconate and triethanolamine, that is, the complexing agent may include trisodium citrate and sodium gluconate, the complexing agent may also include trisodium citrate and triethanolamine, and the complexing agent may also include two of sodium gluconate and triethanolamine. The complexing agent may include trisodium citrate, sodium gluconate and triethanolamine. Selecting trisodium citrate, sodium gluconate and triethanolamine as the complexing agent in the cleaning agent can better dissolve the inorganic salts in the polishing wax and reduce the risk of re-deposition of impurities on the surface after cleaning. Among them, sodium gluconate can also be used as a cosolvent to make the first component and the second component easier to disperse and dissolve in the solvent.

[0088] Among them, the chemical formula of trisodium citrate can be C6 H 5 Na 3 O 7 , CAS number is 68-04-2. The chemical formula of sodium gluconate can be C 6 HNaO 7 , CAS number is 527-07-1. The chemical formula of triethanolamine is C 6 H 15 NO 3 , CAS number is 102-71-6.

[0089] According to an embodiment of the present disclosure, when a complexing agent is included in the cleaning agent, the content of the complexing agent may be 1 to 23 parts by weight. For example, the content of the complexing agent may be 1 part by weight, 2 parts by weight, 3 parts by weight, 5 parts by weight, 8 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, 18 parts by weight, 20 parts by weight, 23 parts by weight, or a range consisting of any two of the above values.

[0090] For example, the complexing agent may include trisodium citrate, sodium gluconate and triethanolamine, wherein the content of trisodium citrate may be 5 to 10 parts by weight, the content of sodium gluconate may be 1 to 5 parts by weight, and the content of triethanolamine may be 5 to 8 parts by weight.

[0091] According to an embodiment of the present disclosure, in the case where a penetrant is included in the cleaning agent, the penetrant may include at least one of N-methyl pyrrolidone and N-methyl-2-pyrrolidone. Exemplarily, the penetrant may include N-methyl pyrrolidone, the penetrant may also include N-methyl-2-pyrrolidone, and the penetrant may also include N-methyl pyrrolidone and N-methyl-2-pyrrolidone. Selecting at least one of N-methyl pyrrolidone and N-methyl-2-pyrrolidone as the penetrant in the cleaning agent is conducive to the penetration of other components in the cleaning agent and improves the cleaning efficiency of the cleaning agent.

[0092] According to an embodiment of the present disclosure, when the cleaning agent includes a penetrant, the content of the penetrant may be 1 to 5 parts by weight. For example, the content of the penetrant may be 1 part by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0093] According to an embodiment of the present disclosure, in the case where a cosolvent is included in the cleaning agent, the cosolvent may include at least one of dipropylene glycol monobutyl ether, diethylene glycol butyl ether, and ethylene glycol monobutyl ether. Exemplarily, the cosolvent may include one of dipropylene glycol monobutyl ether, diethylene glycol butyl ether, and ethylene glycol monobutyl ether, that is, the cosolvent may include dipropylene glycol monobutyl ether, the cosolvent may also include diethylene glycol butyl ether, and the cosolvent may also include ethylene glycol monobutyl ether. The cosolvent may include two of dipropylene glycol monobutyl ether, diethylene glycol butyl ether, and ethylene glycol monobutyl ether, that is, the cosolvent may include dipropylene glycol monobutyl ether and diethylene glycol butyl ether, the cosolvent may also include dipropylene glycol monobutyl ether and ethylene glycol monobutyl ether, and the cosolvent may also include diethylene glycol butyl ether and ethylene glycol monobutyl ether. The cosolvent may include dipropylene glycol monobutyl ether, diethylene glycol butyl ether, and ethylene glycol monobutyl ether. Selecting at least one of dipropylene glycol monobutyl ether, diethylene glycol butyl ether and ethylene glycol monobutyl ether as a co-solvent in the cleaning agent can improve the cleaning agent's ability to dissolve insoluble components and improve the cleaning effect of the cleaning agent.

[0094] According to an embodiment of the present disclosure, when the cleaning agent includes a co-solvent, the content of the co-solvent may be 8 to 12 parts by weight. For example, the content of the co-solvent may be 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, or a range consisting of any two of the above values.

[0095] In some embodiments of the present disclosure, the cleaning agent includes a first component, a second component and a third component. The first component includes sorbitan laurate, coconut fatty acid diethanolamide, lauryl polyoxyethylene ether, and alkyl glucoside; the second component includes sodium dodecyl diphenyl ether disulfonate; and the third component includes benzotriazole. The cleaning agent also includes trisodium citrate, sodium gluconate, triethanolamine, N-methylpyrrolidone and dipropylene glycol monobutyl ether. The cleaning agent includes the above components, which can further effectively clean the high-gloss surface of the metal part and better protect the metallic luster of the high-gloss surface of the metal part.

[0096] Optionally, the content of sorbitan laurate can be 5 to 8 parts by weight. Exemplarily, the content of sorbitan laurate can be 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, or a range consisting of any two of the above values.

[0097] Optionally, the content of coconut fatty acid diethanolamide can be 10 to 15 parts by weight. Exemplarily, the content of coconut fatty acid diethanolamide can be 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, or a range consisting of any two of the above values.

[0098] Optionally, the content of lauryl alcohol polyoxyethylene ether can be 8 to 10 parts by weight. Exemplarily, the content of lauryl alcohol polyoxyethylene ether can be 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, or a range consisting of any two of the above values.

[0099] Optionally, the content of the alkyl glucoside may be 3 to 5 parts by weight. For example, the content of the alkyl glucoside may be 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0100] Optionally, the content of sodium dodecyl diphenyl oxide disulfonate can be 2 to 5 parts by weight. Exemplarily, the content of sodium dodecyl diphenyl oxide disulfonate can be 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0101] Optionally, the content of trisodium citrate can be 5 to 10 parts by weight. Exemplarily, the content of trisodium citrate can be 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, or a range consisting of any two of the above values.

[0102] Optionally, the content of sodium gluconate can be 1 to 5 parts by weight. Exemplarily, the content of sodium gluconate can be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0103] Optionally, the content of triethanolamine can be 5 to 8 parts by weight. Exemplarily, the content of triethanolamine can be 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, or a range consisting of any two of the above values.

[0104] Optionally, the content of N-methylpyrrolidone can be 1 to 5 parts by weight. Exemplarily, the content of N-methylpyrrolidone can be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a range consisting of any two of the above values.

[0105] Optionally, the content of benzotriazole can be 0.5 to 2 parts by weight. For example, the content of benzotriazole can be 0.5 parts by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, or a range consisting of any two of the above values.

[0106] Optionally, the content of dipropylene glycol monobutyl ether can be 8 to 12 parts by weight. Exemplarily, the content of dipropylene glycol monobutyl ether can be 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, or a range consisting of any two of the above values.

[0107] According to the embodiments of the present disclosure, the above-mentioned cleaning agent may include a solvent or may not include a solvent. In the case of including a solvent, the solvent may be water, alcohols, etc. For example, water can be used as a solvent, which has few impurities, avoids the introduction of additional ions to cause metal corrosion and scaling, and ensures that the cleaning effect is stable and lasting; at the same time, a uniform medium environment is created for the dissolution and dispersion of each component, which is conducive to accurately controlling the overall performance of the cleaning agent. The present disclosure does not limit the content of the solvent, and those skilled in the art can adjust the content of the solvent according to actual needs. Optionally, the content of the solvent in the cleaning agent can be 915~980 parts by weight. At this time, the cleaning agent is a concentrated solution. In actual use, the above-mentioned cleaning agent can be further formulated into a cleaning agent with a concentration of 8wt%~12wt% using a solvent. At this time, the concentration of the solvent in the cleaning agent can be 8250~12480 parts by weight.

[0108] Another aspect of the present disclosure provides a method for preparing a cleaning agent, comprising: mixing a first component, a second component and a third component to obtain a cleaning agent.

[0109] Wherein, the first component includes at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; the second component includes at least one of sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate; the third component includes at least one of benzotriazole and imidazoline. Another aspect of the present disclosure provides a method for cleaning a metal part, comprising: immersing the metal part in a cleaning agent once to obtain a metal part after immersion; wherein the cleaning agent comprises: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl oxide disulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate; a third component, including at least one of benzotriazole and imidazoline.

[0110] In some embodiments of the present disclosure, the metal parts may be polished metal parts or unpolished metal parts. The present disclosure does not impose any restrictions on the preparation method of the polished metal parts, and those skilled in the art may perform polishing by conventional methods in the art. For example, the metal polished parts may be prepared by any of mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, etc. Among them, mechanical polishing may be selected due to its advantages such as fast processing speed and strong adaptability.

[0111] In some embodiments of the present disclosure, the metal part may be a polished magnesium alloy part made by a semi-solid die casting process. The above cleaning agent may be used to clean the above magnesium alloy part, which can effectively clean the high-gloss surface of the metal part and maintain the metallic luster of the high-gloss surface of the metal part.

[0112] In some embodiments of the present disclosure, the pH of one immersion may be 10.0-11.5. For example, the pH of one immersion may be 10.0, 10.5, 11, 11.5, or a range consisting of any two of the above values. In the related art, when cleaning the magnesium alloy highlight polished parts obtained by the semi-solid die-casting process, the magnesium alloy is chemically active and prone to corrosion reactions in a strong acid or alkali environment, and the pH is usually in the neutral range. In the process of using the above-mentioned cleaning agent to clean the magnesium alloy highlight polished parts obtained by the semi-solid die-casting process, the magnesium alloy can maintain the metallic luster of the highlight surface of the metal part under the condition of a pH of 10.0-11.5, thereby improving the cleaning effect of the cleaning agent.

[0113] In some embodiments of the present disclosure, the temperature of one immersion may be 65-75°C. For example, the temperature of one immersion may be 65°C, 66°C, 67°C, 68°C, 69°C, 70°C, 71°C, 72°C, 73°C, 74°C, 75°C or a range consisting of any two of the above values.

[0114] In some embodiments of the present disclosure, the time for one immersion may be 3 to 5 minutes. For example, the time for one immersion may be 3 minutes, 3.5 minutes, 4.0 minutes, 4.5 minutes, 5.0 minutes, or a range consisting of any two of the above values. By using the above cleaning agent to immerse the metal polishing part once, the time for one immersion may be shortened.

[0115] In some embodiments of the present disclosure, a single immersion cleaning may be performed under ultrasonic conditions, and those skilled in the art may adjust and select the parameters of the ultrasonic waves according to actual conditions.

[0116] According to an embodiment of the present disclosure, the above-mentioned metal parts cleaning method may further include: spraying and second-immersing the metal parts after the first immersion in sequence to obtain the cleaned metal parts. After the metal parts are first immersed in the above-mentioned cleaning agent, the time of spraying and second-immersion can be shortened.

[0117] According to an embodiment of the present disclosure, the spraying temperature may be 50-60°C. For example, the spraying temperature may be 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, or a range consisting of any two of the above values. The spraying time may be 20-40s. For example, the spraying time may be 20s, 22s, 25s, 28s, 30s, 32s, 35s, 38s, 40s, or a range consisting of any two of the above values.

[0118] According to an embodiment of the present disclosure, the temperature of the secondary immersion may be 50-60°C. For example, the temperature of the secondary immersion may be 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, or a range consisting of any two of the above values. The time of the secondary immersion may be 60-90s. For example, the time of the secondary immersion may be 60s, 62s, 65s, 68s, 70s, 75s, 80s, 82s, 85s, 88s, 90s, or a range consisting of any two of the above values.

[0119] According to an embodiment of the present disclosure, after the metal parts are sprayed and immersed twice in sequence after the first immersion, the steps of third immersion, fourth immersion and drying may be included, wherein the third immersion and fourth immersion may be performed at room temperature.

[0120] Another aspect of the present disclosure provides an electronic device, including a metal shell, which is treated with a cleaning agent; wherein the cleaning agent includes: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; a third component, including at least one of benzotriazole and imidazoline.

[0121] In some embodiments of the present disclosure, the metal shell can be a metal shell of any metal type, for example, it can be an aluminum alloy metal shell, or it can be a magnesium alloy metal shell. The metal shell can also be a polished metal shell, the metal shell can also be a magnesium alloy shell made by a semi-solid die-casting process, and the metal shell can also be a polished magnesium alloy shell made by a semi-solid die-casting process. Using the above-mentioned cleaning agent to clean the polished metal shell can not only effectively clean the high-gloss surface of the metal shell, but also maintain the metallic luster of the high-gloss surface of the metal shell.

[0122] In some embodiments of the present disclosure, the metal shell is treated with a cleaning agent including one immersion. Optionally, the pH of the immersion may be 10.0-11.5, the temperature of the immersion may be 65-75° C., and the time of the immersion may be 3-5 minutes.

[0123] The following will further introduce the surface treatment method of metal parts with metal highlight effect.

[0124] According to an embodiment of the present disclosure, a surface treatment method for a metal part with a metal highlight effect comprises the following steps: mechanically highlighting the surface of the metal part, and polishing the position after the highlighting treatment to form a metal highlighting effect; treating the polished material with a cleaning agent; forming a transparent polymer film at the position after the highlighting treatment to obtain a metal part with a metal highlighting effect; wherein the cleaning agent comprises: a first component, including at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; a second component, including at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; a third component, including at least one of benzotriazole and imidazoline.

[0125] It should be noted that the metal part can present a metal highlight effect in its entirety or in part, such as the side wall of the shell, the position of the trademark, etc. For a metal part that presents a metal highlight effect in part, the local area with the metal highlight effect and other areas can have the same paint film or different paint films.

[0126] In some embodiments of the present disclosure, a metal part having an overall metallic highlight effect may be surface treated according to the following process flow.

[0127] 1.1 Mechanical highlight processing

[0128] In order to achieve the metal highlight effect of metal parts, the CNC numerical control center can be used to perform high-speed CNC fine processing on the surface of the metal parts, exposing the metal base material and presenting better flatness and gloss.

[0129] 1.2 Polishing

[0130] The surface of metal parts can be polished with a polishing wheel to form a metal highlight effect. During the polishing process, polishing paste can be used, which can include abrasives such as stearic acid, palmitic acid, aluminum oxide, quartz powder, lubricants such as lanolin, beeswax, and other additives.

[0131] 1.3 Cleaning

[0132] The metal part can be immersed in the cleaning solution once to obtain the metal part after immersion. The pH of the immersion can be 10.0-11.5, the temperature can be 65-75° C., and the time can be 3-5 minutes.

[0133] The metal parts after the primary immersion can be sprayed, immersed twice, immersed three times, immersed four times and dried in sequence to obtain the cleaned metal parts. The spraying temperature can be 50-60°C and the time can be 20-40s; the secondary immersion temperature can be 50-60°C and the time can be 60-90s; the third immersion and the fourth immersion are both room temperature immersion.

[0134] 1.4 Preparation of transparent film

[0135] A transparent conversion film may be formed at the location of the high light treatment to serve as a base layer for the protective layer and the polymer layer. For example, an organic silicon-inorganic silicon transparent conversion film may be formed at the location of the high light treatment by a transparent chemical conversion process.

[0136] 1.5 Preparation of polymer films

[0137] A polymer film can be formed at the highlight-treated position by spraying or electrophoretic coating to protect the highlight position. For example, transparent anodic electrophoresis can be used, and the workpiece is used as the anode for coating. An anodic electrophoretic layer can be deposited on the surface of the transparent chemical conversion film to protect the highlight position, so as to obtain a metal part with surface treatment.

[0138] In some embodiments of the present disclosure, a metal part having a metal highlight effect locally may be surface treated according to the following process flow, in which case the local area having the metal highlight effect has a different paint film than other areas.

[0139] 2.1 Polishing

[0140] Metal parts can be polished to remove rough surfaces and make the surface of metal parts uniform to facilitate subsequent processing.

[0141] 2.2 Preprocessing

[0142] The metal parts can be pre-treated by chemical conversion process or micro-arc oxidation process to remove the oxide film on the surface of the metal parts and form a protective layer on the surface.

[0143] 2.3 Spraying or electrophoretic coating

[0144] Conventional electrophoresis or spraying processes can be used to coat metal parts to achieve good protection for them.

[0145] 2.4 Local pattern processing

[0146] The local surface of the metal part can be subjected to CNC highlight treatment or and / or laser processing, and the local area can be polished to form a metal highlight effect. During the polishing process, a polishing paste can be used, and the polishing paste can include abrasives such as stearic acid, palmitic acid, aluminum oxide, quartz powder, lubricants such as lanolin, beeswax, and other additives.

[0147] 2.5 Cleaning

[0148] Refer to the above step 1.3, which will not be repeated here.

[0149] 2.6 Preparation of transparent film

[0150] Refer to the above step 1.4, which will not be repeated here.

[0151] 2.7 Preparation of polymer membrane

[0152] Refer to the above step 1.5, which will not be repeated here.

[0153] In some embodiments of the present disclosure, metal parts having local metallic highlight effects may also be surface treated according to the following process flow, in which case the local area having the metallic highlight effect has the same paint film as other areas.

[0154] 3.1 Polishing

[0155] Metal parts can be polished to remove rough surfaces and make the surface of metal parts uniform to facilitate subsequent processing.

[0156] 3.2 Polishing

[0157] The surface of metal parts can be polished with a polishing wheel to form a metal highlight effect. During the polishing process, polishing paste can be used, which can include abrasives such as stearic acid, palmitic acid, aluminum oxide, quartz powder, lubricants such as lanolin, beeswax, and other additives.

[0158] 3.3 Cleaning

[0159] Refer to the above step 1.3, which will not be repeated here.

[0160] 3.4 Local Area Shading

[0161] A UV ink process or a photoresist process may be used to mask the local area where a metal highlight effect is required.

[0162] For example, UV ink can be used to spray the entire surface of the metal part so that the treated surface of the metal part is completely covered and wrapped. After baking and drying, the ink has non-flowability. At this time, the film is placed in the local area with the metal highlight effect, and the whole part is placed in the UV exposure machine. Through UV light irradiation, the ink in the irradiated area is cross-linked and cured, and the unirradiated area is not cross-linked. Then the ink in the uncross-linked part is removed by spraying the developer to expose the metal substrate. The cross-linked pattern ink layer is retained until the next stage to achieve local area shielding of the metal part.

[0163] 3.5 Overall sandblasting

[0164] The surface of the metal part can be sandblasted to obtain a uniform sandblasted surface. During the sandblasting process, the part without ink protection will be hit by quartz sand to form a hemispherical rough surface, and finally reach the roughness requirement of the process, such as a surface with a roughness of about Ra=1.2um. The pattern with ink protection can resist the impact of quartz sand and does not change. For example, the sandblasting pressure can be 3~5Mpa, the sandblasting time can be 2~3min, and the sand number can be 180#.

[0165] 3.6 Removing occlusion from local areas

[0166] Ink removers can be used to remove the remaining ink pattern to expose the bright metal surface underneath.

[0167] 3.7 Preparation of transparent film

[0168] Refer to the above step 1.4, which will not be repeated here.

[0169] 3.8 Preparation of polymer membrane

[0170] Referring to the above step 1.5, no further description is given here. Hereinafter, examples and comparative examples are given to more specifically illustrate the implementation of the present application. It should be noted that the specific examples below are only used for illustration and are not intended to limit the present disclosure.

[0171] Test methods and equipment

[0172] Metal reflectivity test:

[0173] The metal reflectivity test is performed on the cleaned magnesium alloy parts in each embodiment and comparative example to obtain the reflectivity of the corresponding magnesium alloy parts. Metal reflectivity refers to the ability of the metal surface to reflect incident light, and is usually expressed as the ratio of the reflected light intensity (RB value) to the incident light intensity (RW). The roughness, flatness and cleanliness of the metal surface will affect its reflectivity. The smoother and flatter the surface, the higher the reflectivity; conversely, a rough surface will scatter light, resulting in a decrease in reflectivity. Therefore, the present disclosure uses metal reflectivity to reflect the oxidation condition and wax residue on the surface of the cleaned magnesium alloy parts.

[0174] Testing equipment: C84-III reflectivity meter, the instrument consists of a probe, a main body, a standard plate (one black and one white), a working ceramic plate (two black and two white), etc. The probe adopts the principle of 0° irradiation and diffuse reflection reception. When the reflected light of the sample acts on the surface of the silicon photocell or selenium photocell, an electrical signal will be generated. The signal is input to the DC amplifier for amplification and displayed as a reading. Measuring range: 0-100, repeatability: 0.3%, display data: proportional to the intensity of the reflected light, input power: 220V±10%, 50Hz.

[0175] Test conditions: Ambient temperature: 20°±5°, relative humidity <85%.

[0176] Appearance inspection

[0177] The cleaned magnesium alloy parts in each embodiment and comparative example were subjected to appearance inspection to observe the oxidation condition and wax residue on the surface of the magnesium alloy parts.

[0178] Example 1

[0179] Preparation of cleaning agent: Weigh by weight: 8g of sorbitan laurate, 10g of coconut fatty acid diethanolamide, 10g of lauryl alcohol polyoxyethylene ether, 5g of alkyl glucoside, 5g of sodium dodecyl diphenyl ether disulfonate, 0.5g of benzotriazole, 5g of trisodium citrate, 5g of sodium gluconate, 5g of triethanolamine, 1g of N-methylpyrrolidone, 8g of dipropylene glycol monobutyl ether, and make up to 1000g with water to obtain a mixed solution. Take the above mixed solution to prepare a cleaning agent with a concentration of 8%.

[0180] The above-prepared cleaning agent is used to clean the metal polished parts in the following manner:

[0181] Ten magnesium alloy parts were immersed in the above cleaning agent once to obtain metal polished parts after one immersion. Among them, the magnesium alloy parts were magnesium alloy parts made by semi-solid die casting process after mechanical highlight polishing, and the pH of the one immersion was 10.5, the temperature was 65°C, and the time was 3 minutes.

[0182] The metal polished parts after the first immersion are sprayed, immersed twice, immersed three times, immersed four times and dried in sequence to obtain the cleaned metal polished parts. The spraying temperature is 55°C and the time is 30s; the second immersion temperature is 55°C and the time is 70s; the third immersion and the fourth immersion are both immersed at room temperature.

[0183] Examples 2 to 9, Comparative Examples 1 to 5

[0184] Except for adjusting the composition of the mixed solution according to Table 1, the rest is the same as Example 1.

[0185] Comparative Example 6

[0186] The process is the same as that of Example 1 except that the cleaning agent in Example 1 is replaced by the commercially available HDW-3090L wax removal agent.

[0187] Table 1

[0188]

[0189] The metal reflectivity of the magnesium alloy parts after cleaning in the above embodiments 1 to 14 and comparative examples 1 to 6 was tested, and the test results are shown in Table 2. The appearance of the magnesium alloy parts after cleaning in the above embodiments 1 to 14 and comparative examples 1 to 6 was tested, and the test results are shown in Table 2. Some of the actual pictures are shown in Table 2. Figure 1 to Figure 8 ,in, Figure 1~Figure 3 They are respectively the physical pictures of the magnesium alloy parts after cleaning in Examples 1 to 3, Figures 4 to 8 They are actual pictures of the magnesium alloy parts after cleaning in Comparative Examples 1 to 5.

[0190] Table 2

[0191]

[0192] From Table 2 and Figure 1 to Figure 8 Analysis shows that after the magnesium alloy parts in Examples 1 to 14 were cleaned with a cleaning agent, the metal highlighting effect was good, and the metal reflectivity was above 85%. Some magnesium alloy parts had a small amount of wax residue, which could be removed by extending the cleaning time, increasing the amount of cleaning agent, etc. However, after cleaning, the magnesium alloy high-gloss polished parts in Comparative Examples 1 to 6 had different degrees of corrosion and oxidation on the surface, and the metal reflectivity was below 53%, or more wax residue was left.

[0193] The magnesium alloy part after cleaning in the above Example 1 was stored for three days and then subjected to appearance inspection. The mirror finish of the surface of the magnesium alloy part did not change significantly, and the metal reflectivity was 90%.

[0194] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0195] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A cleaning agent comprising: A first component comprising at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; The second component includes at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; The third component includes at least one of benzotriazole and imidazoline.

2. The cleaning agent according to claim 1, wherein: The weight ratio of at least one of the sorbitan laurate and sorbitan monopalmitate to the coconut fatty acid diethanolamide is 1:(1.25-3).

3. The cleaning agent according to claim 1, wherein: The content of the first component is 15 to 38 parts by weight; The content of the second component is 2 to 5 parts by weight; The content of the third component is 0.5-2 parts by weight.

4. The cleaning agent according to claim 1, wherein: The first component further comprises at least one of lauryl alcohol polyoxyethylene ether and alkyl glucoside.

5. The cleaning agent according to any one of claims 1 to 4, wherein: The cleaning agent also includes at least one of a complexing agent, a penetrant and a co-solvent.

6. The cleaning agent according to claim 5, wherein: In the case where the complexing agent is included in the cleaning agent, the complexing agent includes at least one of trisodium citrate, sodium gluconate and triethanolamine; In the case where the cleaning agent contains the penetrant, the penetrant includes at least one of N-methylpyrrolidone and N-methyl-2-pyrrolidone; In the case where the cleaning agent contains the auxiliary solvent, the auxiliary solvent includes at least one of dipropylene glycol monobutyl ether, diethylene glycol butyl ether, and ethylene glycol monobutyl ether.

7. The cleaning agent according to claim 5, wherein: When the cleaning agent contains the complexing agent, the content of the complexing agent is 1 to 23 parts by weight; When the cleaning agent contains the penetrant, the content of the penetrant is 1 to 5 parts by weight; When the cleaning agent contains the co-solvent, the content of the co-solvent is 8 to 12 parts by weight.

8. The cleaning agent according to claim 1, wherein: The first component includes sorbitan laurate, coconut fatty acid diethanolamide, lauryl alcohol polyoxyethylene ether, and alkyl glucoside; The second component includes sodium dodecyl diphenyl ether disulfonate; The third component includes benzotriazole; The cleaning agent also includes trisodium citrate, sodium gluconate, triethanolamine, N-methylpyrrolidone and dipropylene glycol monobutyl ether.

9. The cleaning agent according to claim 8, wherein: The content of the sorbitan laurate is 5 to 8 parts by weight; The content of the coconut fatty acid diethanolamide is 10 to 15 parts by weight; The content of the lauryl alcohol polyoxyethylene ether is 8 to 10 parts by weight; The content of the alkyl glucoside is 3 to 5 parts by weight; The content of the sodium dodecyl diphenyl ether disulfonate is 2 to 5 parts by weight; The content of trisodium citrate is 5 to 10 parts by weight; The content of sodium gluconate is 1 to 5 parts by weight; The content of triethanolamine is 5 to 8 parts by weight; The content of N-methylpyrrolidone is 1 to 5 parts by weight; The content of the benzotriazole is 0.5 to 2 parts by weight; The content of the dipropylene glycol monobutyl ether is 8 to 12 parts by weight.

10. An electronic device comprising a metal housing, wherein the metal housing has been treated with a cleaning agent; in, The cleaning agent comprises: A first component comprising at least one of sorbitan laurate and sorbitan monopalmitate and coconut fatty acid diethanolamide; The second component includes at least one of sodium dodecyl diphenyl ether disulfonate, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate; The third component includes at least one of benzotriazole and imidazoline.

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