Dehydrating agent composition and use method thereof and surface treatment method for plated parts

Abstract

The present application relates to the field of interface treatment technology, and in particular to a dehydrating agent composition and a method for using the same, and a method for treating the surface of a plated part, which can improve the dehydration effect while removing dirt, reduce watermarks, stains, etc., thereby improving the adhesion of the subsequent film layer on the part to be dehydrated, and at the same time, can also avoid the problem that the hydrophobicity of the dehydrating agent composition is too large and is not conducive to the bonding of the subsequent film layer. A dehydrating agent composition, the dehydrating agent composition includes: a silane coupling agent, a surfactant, a slow-release agent and an organic solvent; wherein the silane coupling agent, the surfactant and the slow-release agent can all be dissolved or dispersed in the organic solvent to form a homogeneous solution, and the slow-release agent is used to form an adsorption layer on the surface of the part to be dehydrated to block water molecules from contacting the part to be dehydrated, and the surface tension of the dehydrating agent composition is 25 mN / m~45 mN / m.

Description

Technical Field

[0001] The present application relates to the technical field of interface treatment, and in particular to a dehydrating agent composition and a method for using the same, and a method for treating the surface of a plated part. Background Art

[0002] With the continuous development of industrial technology and the continuous improvement of people's living standards, people have higher and higher requirements for the functions of various products. For example, in some plated products, the surface of the plated parts needs to be treated to meet the use requirements.

[0003] However, in the related art, when performing surface treatment on plated parts, there is often a problem that water cleaning is not thorough, and watermarks, stains, etc. are easily formed, resulting in insufficient bonding between the latter film layer and the previous film layer. Summary of the invention

[0004] Based on this, some embodiments of the present application provide a dehydrating agent composition, which can improve the dehydration effect while removing dirt, reduce watermarks, stains, etc., so as to improve the adhesion ability of the subsequent film layer on the part to be dehydrated, and at the same time, it can also avoid the problem that the hydrophobicity of the dehydrating agent composition is too large and is not conducive to the bonding of the subsequent film layer. Some embodiments of the present application provide a method for using the dehydrating agent composition and a method for surface treatment of a plated part using the dehydrating agent composition.

[0005] In a first aspect, a dehydrating agent composition is provided, the dehydrating agent composition comprising: a silane coupling agent, a surfactant, a sustained-release agent and an organic solvent;

[0006] The silane coupling agent, the surfactant and the sustained-release agent can all be dissolved or dispersed in the organic solvent to form a homogeneous solution, and the sustained-release agent is used to form an adsorption layer on the surface of the part to be dehydrated to prevent water molecules from contacting the part to be dehydrated, and the surface tension of the dehydrating agent composition is 25 mN / m~45 mN / m.

[0007] Optionally, the sustained-release agent includes at least one of zinc chloride, sodium silicate, ethylenediaminetetramethylenephosphonic acid and aminotrimethylenephosphonic acid.

[0008] Optionally, the silane coupling agent includes at least one of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane.

[0009] Optionally, the surfactant includes at least one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0010] Optionally, the organic solvent includes at least one of ethanol, isopropanol, acetone, toluene and ethylene dichloride.

[0011] Optionally, in the dehydrating agent composition, the mass proportion of the silane coupling agent is 15% to 25%, the mass proportion of the surfactant is 5% to 10%, the mass proportion of the sustained-release agent is 2% to 5%, and the mass proportion of the organic solvent is 65% to 78%.

[0012] In a second aspect, a method for using the dehydrating agent composition according to the first aspect is provided, comprising:

[0013] Mixing the components in the dehydrating agent composition to prepare a homogeneous solution;

[0014] diluting the homogeneous solution with pure water to prepare a dehydrated solution;

[0015] Using the dehydrating liquid to clean the workpiece for the first time;

[0016] The surface of the workpiece to be processed is cleaned for the second time with pure water after the first cleaning.

[0017] Optionally, the method of use satisfies at least one of the following conditions:

[0018] (1) The first cleaning comprises: soaking the workpiece to be treated in the dehydrating liquid for a first preset time;

[0019] (2) The second cleaning comprises: soaking the workpiece after the first cleaning in pure water for a second preset time.

[0020] In a third aspect, a method for treating a surface of a plated part is provided, comprising:

[0021] Providing a plated part and the dehydrating agent composition as described in the first aspect, wherein an electroplating layer is formed on the surface of the plated part;

[0022] Mixing the components in the dehydrating agent composition to prepare a homogeneous solution;

[0023] diluting the homogeneous solution with pure water to prepare a dehydrated solution;

[0024] Using the dehydrating liquid to clean the plated part for the first time;

[0025] The surface of the plated part after the first cleaning is cleaned for the second time using pure water.

[0026] Optionally, the plated part surface treatment method satisfies at least one of the following conditions:

[0027] (1) The mass proportion of the dehydrating agent composition in the dehydrating liquid is 5% to 10%;

[0028] (2) The first cleaning comprises: immersing the plated component in the dehydration liquid for a first preset time; optionally, the first preset time is 15 seconds to 40 seconds;

[0029] (3) The second cleaning comprises: soaking the plated component after the first cleaning in pure water for a second preset time; optionally, the second preset time is 15s to 40s.

[0030] The beneficial effects of the above-mentioned dehydrating agent composition, its use method and plated surface treatment method are as follows:

[0031] A homogeneous solution is prepared by dissolving or dispersing a silane coupling agent, a surfactant and a slow-release agent in an organic solvent. When the homogeneous solution is used to dehydrate a workpiece to be dehydrated, the silane coupling agent, the surfactant and the slow-release agent work together to form a protective film with strong adsorption performance on the surface of the workpiece to be dehydrated, which can block water from contacting the surface of the workpiece to be dehydrated, thereby improving the dehydration effect while removing dirt, reducing watermarks, stains, etc., and further improving the adhesion of the subsequent film layer on the workpiece to be dehydrated. At the same time, by limiting the surface tension of the dehydrating agent composition to a range of 25 mN / m to 45 mN / m, the problem that the hydrophobicity of the dehydrating agent composition is too large and is not conducive to the bonding of the subsequent film layer can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic flow chart of a method for using a dehydrating agent composition provided in an embodiment of the present application;

[0033] Figure 2 A schematic flow chart of a method for surface treatment of a plated component provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "exemplarily" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0036] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0037] In this document, "for example", "such as", "example", "for example", etc. are used for descriptive purposes, indicating that the previous and subsequent different technical solutions are related in terms of the content covered, but should not be understood as limiting the previous technical solution, nor can they be understood as limiting the scope of protection of this document. In this document, unless otherwise specified, A (such as B) means that B is a non-limiting example of A, and it can be understood that A is not limited to B.

[0038] In this article, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel options of "yes" or "no". If there are multiple "options" in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "option" is independent.

[0039] Herein, descriptions such as "optionally contain", "optionally include", etc., mean "contain or not contain". "Optional component X" means component X exists or does not exist, or means containing or not containing the component X.

[0040] In this document, the terms "first", "second", etc. in "the first aspect", "the second aspect", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0044] In this document, "at least one" means more than one, such as one, two and more than two. "Multiple" or "several" means at least two, such as two, three, etc.

[0045] Herein, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​within the numerical interval is considered to be continuous and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when a numerical interval only refers to integers within the numerical interval, including the two endpoint integers of the numerical range, and each integer between the two endpoints, is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows broadly including numerical interval types such as percentage intervals, ratio intervals, and ratio intervals.

[0046] In this article, when it comes to percentage concentration, unless otherwise specified, it refers to the final concentration. The final concentration refers to the proportion of the added component in the system after the addition of the component.

[0047] In this article, if there are multiple steps involved in the method flow, unless there is a clear different description in this article, there is no strict order restriction for the execution of these steps, and they can be executed in other orders than described. Moreover, any step can include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn, alternating or simultaneously with other steps or parts of sub-steps or stages of other steps.

[0048] In view of the technical problem that when surface treatment is performed on plated parts in the related art, water cleaning is often not clean, watermarks and stains are easily formed, resulting in insufficient bonding between the latter film layer and the previous film layer, the specific implementation method of the present application is described as follows:

[0049] In a first aspect, some embodiments of the present application provide a dehydrating agent composition, which includes: a silane coupling agent, a surfactant, a sustained-release agent and an organic solvent; wherein the silane coupling agent, the surfactant and the sustained-release agent can all be dissolved or dispersed in the organic solvent to form a homogeneous solution, and the sustained-release agent is used to form an adsorption layer on the surface of the part to be dehydrated to block water molecules from contacting the part to be dehydrated, and the surface tension of the dehydrating agent composition is 25 mN / m~45 mN / m.

[0050] Among them, a homogeneous solution refers to a solution in which the solute is uniformly dispersed in the solvent in the form of molecules, ions or atoms, and there is no stratification in the entire solution system and no phase interface exists.

[0051] At the boundary between liquid and gas, that is, the surface of the liquid and the interface between two immiscible liquids, an extremely small pulling force is generated due to the attraction between molecules. Assume that there is a thin film layer on the surface, which bears the tensile force of this surface. This pulling force of the liquid is called surface tension.

[0052] Here, the surface tension of the dehydrating agent composition can be obtained by measuring the components at room temperature (20°C~35°C) after mixing. The surface tension of the dehydrating agent composition can be measured by the maximum bubble pressure method; specifically, the mixed liquid of the dehydrating agent composition is loaded into the surface tension meter, the end face of the capillary is tangent to the liquid surface, the liquid surface rises along the capillary, and when the pressure is reduced by a drain pipe, the pressure on the liquid surface gradually decreases, and the gas-liquid surface in the capillary is gradually pressed to the tube mouth under the action of atmospheric pressure and bubbles are formed. When the bubble curvature radius is the smallest (equal to the capillary radius), the corresponding equilibrium pressure is the largest. According to the relationship between the equilibrium pressure, atmospheric pressure, capillary radius and surface tension at this time, the surface tension of the dehydrating agent composition can be calculated.

[0053] When the dehydrating agent composition is used, the silane coupling agent, the surfactant and the slow-release agent are dissolved in an organic solvent to prepare a homogeneous solution, and the dehydrating part to be dehydrated can be dehydrated. Specifically, the slow-release agent is used to form an adsorption layer on the surface of the part to be dehydrated to block water molecules from contacting the part to be dehydrated, so that dehydration can be effectively performed. At the same time, the slow-release agent can also protect the surface of the part to be dehydrated during the dehydration process, and reduce the corrosion of the part to be dehydrated during the dehydration process; the silane coupling agent plays a role in making the slow-release agent uniformly dispersed in the organic solvent and making the dehydrating agent composition form a protective film with strong adsorption on the surface of the part to be dehydrated; the surfactant has a lipophilic group and a hydrophilic group, the lipophilic group will be adsorbed on the oil and grease on the surface of the part to be dehydrated, and the hydrophilic group extends into the water, playing a role in decontamination and making the dehydrating agent composition uniformly distributed on the surface of the part to be dehydrated; the organic solvent plays a role in dissolving and volatilizing.

[0054] In the dehydrating agent composition provided in the embodiment of the present application, a homogeneous solution is prepared by dissolving a silane coupling agent, a surfactant and a sustained-release agent in an organic solvent. When the homogeneous solution is used to dehydrate the part to be dehydrated, the silane coupling agent, the surfactant and the sustained-release agent work together to form a protective film with strong adsorption performance on the surface of the part to be dehydrated, which can block water from contacting the surface of the part to be dehydrated, thereby improving the dehydration effect while removing dirt, reducing watermarks, stains, etc., and further improving the adhesion of the subsequent film layer on the part to be dehydrated. At the same time, by limiting the surface tension of the dehydrating agent composition to within the range of 25 mN / m ~45 mN / m, it is also possible to avoid the problem that the hydrophobicity of the dehydrating agent composition is too large and is not conducive to the bonding of the subsequent film layer.

[0055] In some embodiments, the sustained release agent comprises at least one of zinc chloride, sodium silicate, ethylenediaminetetramethylenephosphonic acid and aminotrimethylenephosphonic acid.

[0056] When zinc chloride dissolves in water, it produces zinc ions and chloride ions. On the metal surface, zinc ions can react with oxygen and water in the air to gradually form a dense protective film of compounds such as zinc hydroxide or zinc oxide on the metal surface. This film can prevent oxygen, water and other corrosive substances from further contacting the metal surface, thereby slowing down the corrosion rate of the metal.

[0057] Silicates will undergo a certain degree of hydrolysis in water to produce silicic acid and sodium hydroxide. Silicic acid is a weak acid that can further polymerize to form colloidal silica gel. When applied to a metal surface, the silica gel will precipitate on the metal surface to form a continuous, sticky protective film. This film can prevent oxygen, water and corrosive ions (such as chloride ions) from direct contact with the metal surface, thereby slowing down the corrosion of the metal.

[0058] Ethylenediaminetetramethylenephosphonic acid is an organic phosphonic acid compound, which can react with metal ions on the metal surface to form insoluble metal-phosphonate precipitates. These precipitates will deposit on the metal surface to form a protective film, thereby reducing the contact between the metal and water and corrosive substances in the water. Ethylenediaminetetramethylenephosphonic acid also has adsorption properties. The nitrogen atoms and phosphonic acid groups in its molecular structure can interact with the active sites on the metal surface, so that ethylenediaminetetramethylenephosphonic acid is firmly adsorbed on the metal surface. This adsorption further enhances the stability of the protective film and prevents the protective film from falling off easily.

[0059] Aminotrimethylenephosphonic acid has the same mechanism of action as ethylenediaminetetramethylenephosphonic acid and can also form a protective film on the metal surface to reduce the contact between the metal and water and corrosive substances in the water.

[0060] In these embodiments, these slow-release agents can effectively reduce the contact between water and metal, thereby achieving a good dehydration effect.

[0061] In some embodiments, the silane coupling agent includes at least one of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and γ-mercaptopropyltrimethoxysilane.

[0062] γ-Aminopropyltriethoxysilane can undergo hydrolysis and condensation reactions on the metal surface, thereby forming a uniform and dense silane film on the metal surface. This film can prevent oxygen, water and corrosive ions (such as chloride ions, sulfate ions, etc.) from contacting the metal surface, playing a role of physical isolation, thereby slowing down the corrosion of the metal. At the same time, the presence of the silane film can improve the hydrophobicity of the metal surface, making the metal surface less likely to be wetted by water, reducing the residence time and penetration depth of water on the metal surface, and further slowing down the corrosion of the metal.

[0063] γ-(2,3-Epoxypropoxy)propyltrimethoxysilane is an organosilicon compound, and its molecular structure contains epoxy groups and trimethoxysilane groups. The trimethoxysilane group makes it have good hydrolysis properties. Under appropriate conditions (such as in an environment with water), trimethoxysilane can be hydrolyzed to generate silanol (Si-OH). The epoxy group has high reactivity and can react chemically with a variety of functional groups. When it is applied to metal surfaces, the silanol produced after partial hydrolysis of trimethoxysilane can react with the hydroxyl groups on the metal surface (the oxides on the metal surface usually contain hydroxyl groups) to form Si-OM (M represents metal) chemical bonds. This chemical bonding enables the compound to firmly adhere to the metal surface to form a continuous protective film, which can prevent oxygen, water and corrosive ions (such as chloride ions) from contacting the metal surface, thereby slowing down the corrosion of the metal.

[0064] The trimethoxysilane group in the molecular structure of γ-methacryloxypropyltrimethoxysilane is easily hydrolyzed to form silanol groups, which can undergo condensation reaction with hydroxyl groups on the metal surface to form stable chemical bonds, thereby firmly adhering to the metal surface and also forming a protective film on the metal surface.

[0065] γ-Mercaptopropyltrimethoxysilane has the same mechanism of action as γ-methacryloxypropyltrimethoxysilane, and can also form a protective film on the metal surface to slow down metal corrosion.

[0066] In these embodiments, these silane coupling agents can further form a protective film on the metal surface, so that the dehydrating agent composition can form a highly adsorbable protective film on the surface of the object to be dehydrated, thereby improving the dehydration effect.

[0067] In some embodiments, the surfactant includes at least one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0068] During the cleaning process of metal surfaces, fatty alcohol polyoxyethylene ether can play an emulsifying role. The lipophilic groups in its molecules will be adsorbed on the oil, grease and other dirt on the metal surface, while the hydrophilic groups will extend into the water. When stirred or under other mechanical action, fatty alcohol polyoxyethylene ether will disperse the oil in the water in the form of tiny oil droplets to form an emulsion, thereby achieving the purpose of decontamination. At the same time, fatty alcohol polyoxyethylene ether can form an adsorption layer on the metal surface, and its molecules are attached to the metal surface through physical adsorption (such as van der Waals force) or chemical adsorption. This adsorption layer can further enhance the sustained release effect.

[0069] Alkylphenol polyoxyethylene ether, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate have the same mechanism of action as fatty alcohol polyoxyethylene ether and can also play a role in cleaning and sustained release.

[0070] In these embodiments, these surfactants can make the dehydrating agent composition evenly distributed on the surface of the object to be dehydrated, playing a dual role of decontamination and dehydration.

[0071] In some embodiments, in the dehydrating agent composition, the mass proportion of the silane coupling agent is 15% to 25%, the mass proportion of the surfactant is 5% to 10%, the mass proportion of the sustained-release agent is 2% to 5%, and the mass proportion of the organic solvent is 65% to 78%.

[0072] In a second aspect, some embodiments of the present application provide a method for using the dehydrating agent composition as described in the first aspect, such as Figure 1 As shown, including:

[0073] S11), mixing the components in the dehydrating agent composition to prepare a homogeneous solution;

[0074] The components in the dehydrating agent composition are mixed to form a homogeneous solution, so that the components in the dehydrating agent composition are evenly dispersed in the organic solvent, and the dehydrating effect is exerted on the entire object to be treated.

[0075] S12), diluting the homogeneous solution with pure water to prepare a dehydrated solution;

[0076] Among them, pure water refers to water that contains no impurities or only very small amounts of impurities, and will not introduce other impurities during the first cleaning process, such as tap water. In order to further improve the cleaning effect, the pure water can be distilled water.

[0077] After the homogeneous solution is prepared, the dehydrated solution can be prepared by diluting the homogeneous solution with pure water.

[0078] S13), using a dehydrating liquid to perform a first cleaning on the workpiece;

[0079] The dehydrating liquid is used for the first cleaning of the workpiece to be treated, which can replace water to clean the surface of the workpiece to be treated and achieve dehydration at the same time, thereby reducing the contact between water and the surface of the workpiece to be treated.

[0080] S14), using pure water to clean the surface of the workpiece for the second time after the first cleaning.

[0081] After the workpiece is cleaned for the first time with a dehydrating liquid, some dehydrating liquid will remain on the surface of the workpiece. By cleaning the surface of the workpiece after the first cleaning with pure water for the second time, the dehydrating liquid remaining on the surface of the workpiece can be removed. This can achieve decontamination and effective dehydration without introducing residual dehydrating agent composition, thereby reducing defects such as watermarks and stains.

[0082] In some embodiments, S11), the step of mixing the components in the dehydrating agent composition to prepare a homogeneous solution may include:

[0083] Pour the organic solvent into a container and place it in a magnetic stirrer for stirring. The speed is controlled at 150 r / min ~350r / min. Then, slowly add the silane coupling agent to the organic solvent and continue stirring for about 30min~60 min to ensure that the silane coupling agent is completely dissolved in the organic solvent. In this process, care should be taken to avoid the silane coupling agent from being added too quickly, resulting in excessive local concentration and agglomeration. Next, add the surfactant dropwise to the above solution and continue stirring for 20 min~30 min to evenly disperse the surfactant in the solution. Subsequently, add the corrosion inhibitor to the solution dispersed with the surfactant and stir for 15min~20 min to fully dissolve the corrosion inhibitor and mix it evenly with other ingredients. Finally, filter the mixed solution through a filter to remove impurities and undissolved particles in the solution to obtain a homogeneous solution, wherein the filter used for filtration has a pore size of 0.2μm~0.45μm.

[0084] In some embodiments, the above-mentioned method of use satisfies at least one of the following conditions:

[0085] (1) A first cleaning step, comprising: soaking the workpiece to be treated in a dehydrating liquid for a first preset time;

[0086] (2) A second cleaning, comprising: soaking the workpiece after the first cleaning in pure water for a second preset time.

[0087] In these embodiments, impurities remaining on the surface of the workpiece to be processed can be removed as much as possible to facilitate subsequent use or subsequent film preparation.

[0088] In a third aspect, some embodiments of the present application provide a method for treating a surface of a plated component, such as Figure 2 As shown, including:

[0089] S21), providing a plated part and the dehydrating agent composition as described in the first aspect, wherein an electroplating layer is formed on the surface of the plated part;

[0090] Wherein, an electroplating layer is formed on the surface of the plated part, and the plated part can be any workpiece on which an electroplating layer is formed by electroplating.

[0091] By way of example, the plated article may be kitchenware or sanitary ware.

[0092] S22), mixing the components in the dehydrating agent composition to prepare a homogeneous solution;

[0093] The components in the dehydrating agent composition are mixed to form a homogeneous solution, so that the components in the dehydrating agent composition are evenly dispersed in the organic solvent, and the dehydrating effect is exerted on the entire electroplating layer.

[0094] S23), diluting the homogeneous solution with pure water to prepare a dehydrated solution;

[0095] For the description of pure water, please refer to the above description and will not be repeated here.

[0096] After the homogeneous solution is prepared, the dehydrated solution can be prepared by diluting the homogeneous solution with pure water.

[0097] S24), using a dehydrating liquid to clean the plated parts for the first time;

[0098] The dehydrating liquid is used for the first cleaning of the plated parts, which can replace water to clean the surface of the plated parts and achieve dehydration at the same time, reducing the contact between water and the surface of the plated parts, thereby reducing watermarks, stains, etc.

[0099] S25) Use pure water to clean the plated surface for the second time after the first cleaning.

[0100] After the plated parts are cleaned for the first time with a dehydrating liquid, some dehydrating liquid will remain on the surface of the plated parts. By using pure water to clean the surface of the plated parts after the first cleaning for the second time, the dehydrating liquid remaining on the surface of the plated parts can be removed. This can achieve decontamination and effective dehydration without introducing residual dehydrating agent composition, thereby reducing defects such as watermarks and stains.

[0101] At the same time, since the surface tension of the dehydrating agent composition is 25 mN / m~45 mN / m, after the plated part is dehydrated, it is convenient to subsequently prepare a functional layer with strong adhesion and certain hydrophobic effect on the surface of the plated part, such as an anti-fingerprint layer, to avoid the surface tension of the dehydrating agent composition being too small to be conducive to the adhesion of the functional layer, thereby improving the bonding ability between the functional layer and the plated part.

[0102] In some embodiments, the surface treatment method of the plated component satisfies at least one of the following conditions:

[0103] (1) The mass proportion of the dehydrating agent composition in the dehydrating liquid is 5% to 10%;

[0104] (2) a first cleaning, comprising: immersing the plated article in a dehydrating liquid for a first preset time; optionally, the first preset time is 15 s to 40 s;

[0105] (3) A second cleaning, comprising: soaking the plated parts after the first cleaning in pure water for a second preset time; optionally, the second preset time is 15 s to 40 s.

[0106] In these embodiments, the impurities remaining on the surface of the workpiece to be treated can be removed as much as possible through the above-mentioned immersion treatment, so as to facilitate subsequent use or subsequent film layer preparation.

[0107] In order to objectively evaluate the technical effects of the embodiments of the present application, the present application will be described in detail and exemplarily through the following embodiments.

[0108] In the following examples, all raw materials can be purchased from commercial sources, and in order to maintain the reliability of the experiments, the raw materials used in the following examples all have the same physical and chemical parameters or are prepared by the same processing method.

[0109] Example 1

[0110] Embodiment 1 provides a plated part, and the preparation method of the plated part is as follows:

[0111] (1) Pretreatment: Clean the ABS substrate before electroplating to remove grease, dirt, etc. on the surface of the plastic substrate.

[0112] (2) Electroplating a microstructured nickel layer: The ABS substrate pre-treated in step (1) is placed in a microstructured nickel plating solution to deposit a microstructured nickel layer. The thickness of the microstructured nickel layer is 0.5 μm.

[0113] (3) Electroplating of tin-cobalt layer: The workpiece on which the microstructured nickel layer has been electroplated in step (2) is placed in a tin-cobalt plating solution to deposit a tin-cobalt layer having a thickness of 3 μm.

[0114] (4) Dehydrating agent soaking:

[0115] The raw materials of the dehydrating agent composition were weighed: 100 g of γ-aminopropyltriethoxysilane (20%), 350 g of ethanol (70%), 35 g of sodium dodecyl sulfate (7%) and 15 g of ethylenediaminetetramethylenephosphonic acid (3%), and set aside.

[0116] Pour ethanol into the container, and then place it in a magnetic stirrer and stir at a speed of 200r / min. Slowly add γ-aminopropyltriethoxysilane, seal it and continue stirring for 45 minutes to ensure complete mixing.

[0117] Sodium dodecyl sulfate was added dropwise to the above ethanol solution, and the mixture was sealed and stirred for 25 min to evenly disperse the surfactant in the solution. Finally, diaminetetramethylenephosphonic acid was added and stirred for 20 min to fully dissolve the corrosion inhibitor diaminetetramethylenephosphonic acid and mix evenly with other ingredients to obtain a dehydrating agent.

[0118] A dehydrating liquid having a mass concentration of 5% of the dehydrating agent composition was prepared.

[0119] The workpiece prepared in step (3) was immersed in a dehydrating liquid containing 2 L of a dehydrating agent composition having a mass concentration of 5% for 20 seconds. The workpiece was taken out and left in the air for 10 seconds before being immersed in pure water for 30 seconds to clean the surface residue.

[0120] (5) The workpiece cleaned in step (4) is heated to 65° C. in a vacuum oven and dried.

[0121] (6) Spraying paint layer: The dried workpiece is subjected to surface spraying treatment, and matte paint is sprayed to achieve fingerprint resistance. Antibacterial agent is added to the matte paint to achieve antibacterial performance. The thickness of the paint layer is 18 μm.

[0122] Example 2

[0123] The method for preparing the plated part in Example 2 is substantially the same as the method for preparing the plated part in Example 1, except that:

[0124] In step (4), the mass concentration of the dehydrating agent composition in the dehydrating liquid is 7.5%.

[0125] Example 3

[0126] The method for preparing the plated part in Example 3 is substantially the same as the method for preparing the plated part in Example 1, except that:

[0127] In step (4), the mass concentration of the dehydrating agent composition in the dehydrating liquid is 10%.

[0128] Example 4

[0129] The method for preparing the plated part in Example 4 is substantially the same as the method for preparing the plated part in Example 1, except that:

[0130] In step (4), the raw material composition of the dehydrating agent composition is: 75 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane (15%), 390 g of isopropanol (78%), 25 g of fatty alcohol polyoxyethylene ether (5%) and 10 g of zinc chloride (2%).

[0131] Example 5

[0132] The method for preparing the plated part in Example 5 is substantially the same as the method for preparing the plated part in Example 1, except that:

[0133] In step (4), the raw material composition of the dehydrating agent composition is: 125 g of γ-methacryloxypropyltrimethoxysilane (25%), 325 g of acetone (65%), 35 g of alkylphenol polyoxyethylene ether (7%) and 15 g of sodium silicate (3%).

[0134] Example 6

[0135] The method for preparing the plated part in Example 6 is substantially the same as the method for preparing the plated part in Example 1, except that:

[0136] In step (4), the raw material composition of the dehydrating agent composition is: 85 g of γ-mercaptopropyltrimethoxysilane (17%), 340 g of toluene (68%), 50 g of sodium dodecylbenzenesulfonate (10%) and 25 g of aminotrimethylenephosphonic acid (5%).

[0137] Comparative Example 1

[0138] The preparation method of the plated part in Comparative Example 1 is substantially the same as the preparation method of the plated part in Example 1, except that:

[0139] The workpiece prepared in step (3) is not immersed in a dehydrating agent, and the paint layer is directly sprayed on the surface of the workpiece prepared in step (3).

[0140] Test Case

[0141] 1. Visual inspection: The water hanging on the surface of the plated parts provided in Examples 1 to 6 and Comparative Example 1 after being soaked in a dehydrating agent and without being soaked in a dehydrating agent, and the watermarks after drying are observed. It can be found that the surface of the workpiece in Comparative Example 1 has a large amount of water hanging, while the surfaces of the workpieces in Examples 1 to 6 basically do not have water hanging. Correspondingly, the surface of the workpiece in Comparative Example 1 has watermarks after drying, while the surfaces of the workpieces in Examples 1 to 6 do not have watermarks after drying.

[0142] 2. Grid method: Use a special grid knife to grid the surface of the paint layer. The spacing and size of the grids are determined according to the standard regulations or actual needs. After gridding, use a soft brush to gently brush away the debris on the surface of the paint layer. Then, use a transparent pressure-sensitive tape to stick on the grid area, ensuring that the tape is in full contact with the paint layer. Quickly tear off the tape and observe the peeling of the paint layer in the grid. Evaluate the bonding strength grade according to the degree of peeling of the paint layer. For example, according to ISO 2409 standard, grade 0 means that the cut edge is completely smooth and no grid has fallen off; grade 1 means that a small amount of coating has fallen off at the intersection of the cut, but the cross-cut area affected cannot be significantly greater than 5%; the higher the grade, the more serious the peeling. The test results are shown in Table 1 below.

[0143] 3. Boiling test: Select the spray paint samples provided in Examples 1 to 6 and Comparative Example 1. The size should be suitable for the test operation, and ensure that the paint layer on the surface of the sample is uniform and has no obvious defects (such as scratches, scratches, bubbles, etc.). Add an appropriate amount of deionized water to a constant temperature water bath and heat the water to 40°C. Immerse the sample completely in hot water and keep the sample immersed in hot water. Boil at a constant temperature for 24 hours. After the boiling is completed, check the appearance of the paint layer of the sample to see if there are abnormal phenomena such as bubbling, wrinkling, discoloration, and shedding. The test results are shown in Table 1 below.

[0144] 4. Contact angle test: Pure water was dropped on the surface of the plated parts provided in Examples 1 to 6 and Comparative Example 1, which were soaked in a dehydrating agent and those not soaked in a dehydrating agent. The water contact angles of the plated parts provided in Examples 1 to 6 and Comparative Example 1, which were soaked in a dehydrating agent and those not soaked in a dehydrating agent, were tested. The test results are shown in Table 1 below.

[0145] Table 1

[0146]

[0147] It can be seen from Table 1 that the plated parts provided in the embodiment of the present application can improve the cleaning effect, reduce water stains, and at the same time improve the bonding force between the paint layer and the workpiece coating after being soaked in a dehydrating agent. However, water stains are formed on the surface of the workpiece that is not soaked in a dehydrating agent, resulting in insufficient bonding force between the paint layer and the workpiece coating.

[0148] Comparative Examples 1 to 3 show that as the concentration of the dehydrating agent composition in the dehydrating liquid increases, the water contact angle of the workpiece surface after being immersed in the dehydrating agent becomes larger and larger, resulting in a gradual decrease in the bonding force between the paint layer and the workpiece coating.

[0149] By comparing Example 1 with Examples 4 to 6, it can be seen that as the water contact angle of the workpiece surface after being immersed in the dehydrating agent becomes larger and larger, the bonding force between the paint layer and the workpiece coating gradually decreases.

[0150] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0151] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A dehydrating agent composition, characterized in that: The dehydrating agent composition comprises: a silane coupling agent, a surfactant, a slow-release agent and an organic solvent; Among them, the silane coupling agent, the surfactant and the sustained-release agent can all be dissolved or dispersed in the organic solvent to form a homogeneous solution, the sustained-release agent is used to form an adsorption layer on the surface of the part to be dehydrated to block water molecules from contacting the part to be dehydrated, and the surface tension of the dehydrating agent composition is 25 mN / m~45 mN / m.

2. The dehydrating agent composition according to claim 1, characterized in that The sustained-release agent comprises at least one of zinc chloride, sodium silicate, ethylenediaminetetramethylenephosphonic acid and aminotrimethylenephosphonic acid.

3. The dehydrating agent composition according to claim 1, characterized in that The silane coupling agent includes at least one of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane.

4. The dehydrating agent composition according to claim 1, characterized in that The surfactant comprises at least one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

5. The dehydrating agent composition according to claim 1, characterized in that The organic solvent includes at least one of ethanol, isopropanol, acetone, toluene and ethylene dichloride.

6. The dehydrating agent composition according to claim 1, characterized in that In the dehydrating agent composition, the mass proportion of the silane coupling agent is 15% to 25%, the mass proportion of the surfactant is 5% to 10%, the mass proportion of the sustained-release agent is 2% to 5%, and the mass proportion of the organic solvent is 65% to 78%.

7. A method for using the dehydrating agent composition according to any one of claims 1 to 6, characterized in that: include: Mixing the components in the dehydrating agent composition to prepare a homogeneous solution; diluting the homogeneous solution with pure water to prepare a dehydrated solution; Using the dehydrating liquid to clean the workpiece for the first time; The surface of the workpiece to be processed is cleaned for the second time with pure water after the first cleaning.

8. The method of use according to claim 7, characterized in that: The method of use satisfies at least one of the following conditions: (1) The first cleaning comprises: soaking the workpiece to be treated in the dehydrating liquid for a first preset time; (2) The second cleaning comprises: soaking the workpiece after the first cleaning in pure water for a second preset time.

9. A method for treating the surface of a plated part, characterized in that: include: Providing a plated part and the dehydrating agent composition according to any one of claims 1 to 6, wherein an electroplating layer is formed on the surface of the plated part; Mixing the components in the dehydrating agent composition to prepare a homogeneous solution; diluting the homogeneous solution with pure water to prepare a dehydrated solution; Using the dehydrating liquid to clean the plated part for the first time; The surface of the plated part after the first cleaning is cleaned for the second time using pure water.

10. The surface treatment method of plated parts according to claim 9, characterized in that: The plated surface treatment method meets at least one of the following conditions: (1) The mass proportion of the dehydrating agent composition in the dehydrating liquid is 5% to 10%; (2) The first cleaning comprises: immersing the plated component in the dehydration liquid for a first preset time; optionally, the first preset time is 15 seconds to 40 seconds; (3) The second cleaning comprises: soaking the plated component after the first cleaning in pure water for a second preset time; optionally, the second preset time is 15s to 40s.

Images