Preparation process of fluorine-resistant coating containing fluorine ions

Abstract

The invention discloses a preparation process of a fluorine-resistant coating containing fluorine ions, and belongs to the technical field of preparation of fluorine-resistant coatings, the preparation process of the fluorine-resistant coating containing fluorine ions comprises the following steps: S1, grinding and polishing the surface of a workpiece to remove an oxide layer on the surface; s2, the workpiece is subjected to sand blasting treatment; s3, the surface of the workpiece is coated with PVDF; s4, the workpiece is placed in a reaction chamber, the workpiece is maintained in the reaction chamber, and F <-> is immersed in the surface of the aluminum base material; and S5, after the part cured in the reaction chamber is removed, cleaning is conducted, and after cleaning is completed, preparation of the fluorine-ion-containing fluorine-resistant coating on the surface of the workpiece can be completed. The obtained film layer is a growth film layer and is uniform in thickness and good in compactness; the interlayer binding force is good, a good protection effect can be achieved on a base material in the using process, and a film layer is not prone to falling off; the manufacturing process is simple, and the used reagent is low in value; and the used equipment is simple, the steps are fewer, and the production cost can be greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of fluorine-resistant coating preparation, and specifically relates to a process for preparing a fluorine-resistant coating containing fluorine ions. Background Art

[0002] In the PECVD process, F- ions in the PECVD chamber will cause corrosion to the surface of the aluminum substrate. Therefore, in order to avoid corrosion of the aluminum substrate by F- ions, a fluorine-resistant coating is usually prepared on the surface of the aluminum substrate.

[0003] However, the existing fluorine-resistant coating preparation process containing fluorine ions has the following problems:

[0004] (1) The traditional manufacturing process is spraying, and the thickness of the resulting film is uneven;

[0005] (2) The resulting film layer has insufficient bonding strength and will fall off and contaminate the cavity during use;

[0006] (3) The energy consumption of manufacturing equipment is high, and the preparation process has high requirements on the properties of the raw materials themselves, such as purity, powder particle size, powder fluidity, etc.

[0007] (4) The equipment required for film formation is expensive and the process is complicated.

[0008] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0009] The object of the present invention is to provide a process for preparing a fluorine-resistant coating containing fluorine ions, which can solve the problems of uneven film thickness, insufficient film bonding strength, high energy consumption during preparation and expensive film-forming equipment in the existing preparation of fluorine-resistant coatings containing fluorine ions.

[0010] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0011] A process for preparing a fluorine-resistant coating containing fluorine ions comprises the following steps:

[0012] S1. Grind and polish the surface of the workpiece to remove the oxide layer on the surface. Since the oxide layer on the surface of the workpiece will affect the adhesion between the fluorine-resistant coating and the workpiece, it is necessary to remove the oxide layer on the surface of the workpiece by grinding and polishing before applying the fluorine-resistant coating.

[0013] S2. Sandblast the workpiece; sandblasting is used to obtain a certain degree of cleanliness and different degrees of roughness on the surface of the workpiece, thereby improving the mechanical properties of the workpiece surface, thereby improving the fatigue resistance of the workpiece, increasing the adhesion between the workpiece and the fluorine-resistant coating, extending the durability of the coating, and also facilitating the leveling and decoration of the coating.

[0014] S3. Coating PVDF on the surface of the workpiece; PVDF improves the workpiece surface's anti-aging, chemical resistance, weather resistance, UV radiation resistance and other properties.

[0015] S4, placing the workpiece in the reaction chamber, allowing the workpiece to be cured in the reaction chamber, so that F- is immersed in the surface of the aluminum substrate; placing the workpiece with completed surface coating in the reaction chamber, in the reaction chamber, curing the coating of the workpiece, so that the fluoride ions are immersed in the surface of the aluminum substrate.

[0016] S5, after the workpieces have been cured in the reaction chamber, they are removed and cleaned, and after the cleaning, the preparation of the fluorine-containing fluorine-resistant coating on the surface of the workpiece can be completed. After the workpieces have been cured in the reaction chamber, the preparation of the fluorine-containing fluorine-resistant coating is completed after cleaning.

[0017] In one or more embodiments of the present invention, the sandblasting of the workpiece surface in S2 is for workpieces with low requirements for workpiece surface flatness. If the workpiece surface flatness requirement is high, the workpiece surface does not need to be sandblasted. Since sandblasting increases the roughness of the workpiece surface, it is not easy to perform sandblasting on the workpiece surface with high requirements for the surface flatness of the workpiece.

[0018] In one or more embodiments of the present invention, when the workpiece is cured in S4, the reaction chamber needs to be in a vacuum state, so that the workpiece is in a vacuum state. By using a vacuum pump to place the reaction chamber in a vacuum state, the workpiece is placed in a vacuum state, thereby improving the curing effect of the fluorine-resistant coating containing fluorine ions on the surface of the workpiece.

[0019] In one or more embodiments of the present invention, when the workpiece is cured in S4, the reaction chamber is within a specific temperature range, and the workpiece is cured for a certain time within the specific temperature range. Placing the workpiece in the reaction chamber, under specific temperature and time conditions, improves the curing effect of the fluorine-resistant coating containing fluorine ions on the surface of the workpiece.

[0020] In one or more embodiments of the present invention, the temperature of the reaction chamber is controlled at 430-470° C. When the workpiece is cured, the temperature of the reaction chamber is controlled at 430-470° C. Within this temperature range, the oxidation effect of the fluorine-resistant coating containing fluorine ions is optimal.

[0021] In one or more embodiments of the present invention, the workpiece curing time is maintained for 4 to 5 hours while the temperature of the reaction chamber remains unchanged. When the workpiece is cured, the workpiece is cured for 4 to 5 hours at a temperature range of 430 to 470° C., so that the oxidation effect of the fluorine-resistant coating containing fluorine ions is optimal.

[0022] In one or more embodiments of the present invention, when the workpiece is cleaned in S5, a multiple cleaning method is used to clean the workpiece. The multiple cleaning method ensures that waste on the surface of the workpiece is cleaned.

[0023] In one or more embodiments of the present invention, the multiple cleaning methods select deionized high-pressure water washing and ultrasonic cleaning, firstly, the workpiece is washed with deionized high-pressure water, and after the deionized water washing is completed, the surface of the workpiece is cleaned again with ultrasonic waves. The surface of the workpiece after curing is initially cleaned with deionized water, and then the surface of the workpiece is cleaned again with ultrasonic waves, so that the waste on the surface of the workpiece is cleaned.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] (1) The obtained film layer is a growth film layer with uniform thickness and good density;

[0026] (2) The interlayer bonding force is good, which can provide good protection for the base material during use, and the film layer is not easy to fall off;

[0027] (3) The manufacturing process is simple and the reagents used are of low value;

[0028] (4) The equipment used is simple and the steps are few, which can greatly reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The present invention is a flowchart of a process for preparing a fluorine-resistant coating containing fluorine ions in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] A fluorine-resistant coating preparation process containing fluorine ions in one embodiment of the present invention can solve the problems of uneven film thickness, insufficient film bonding strength, high energy consumption during preparation, and expensive film-forming equipment during the preparation of existing fluorine-resistant coatings containing fluorine ions.

[0033] like Figure 1 As shown, the preparation process of the fluorine-resistant coating containing fluorine ions includes the following steps:

[0034] S1. Grind and polish the surface of the workpiece to remove the oxide layer on the surface. Since the oxide layer on the surface of the workpiece will affect the adhesion between the fluorine-resistant coating and the workpiece, it is necessary to remove the oxide layer on the surface of the workpiece by grinding and polishing before applying the fluorine-resistant coating.

[0035] S2. Sandblast the workpiece; sandblasting is used to obtain a certain degree of cleanliness and different degrees of roughness on the surface of the workpiece, thereby improving the mechanical properties of the workpiece surface, thereby improving the fatigue resistance of the workpiece, increasing the adhesion between the workpiece and the fluorine-resistant coating, extending the durability of the coating, and also facilitating the leveling and decoration of the coating.

[0036] S3. Coating PVDF on the surface of the workpiece; PVDF improves the workpiece surface's anti-aging, chemical resistance, weather resistance, UV radiation resistance and other properties.

[0037] S4, placing the workpiece in the reaction chamber, allowing the workpiece to be cured in the reaction chamber, so that F- is immersed in the surface of the aluminum substrate; placing the workpiece with completed surface coating in the reaction chamber, in the reaction chamber, curing the coating of the workpiece, so that the fluoride ions are immersed in the surface of the aluminum substrate.

[0038] S5, after the workpieces have been cured in the reaction chamber, they are removed and cleaned, and after the cleaning, the preparation of the fluorine-containing fluorine-resistant coating on the surface of the workpiece can be completed. After the workpieces have been cured in the reaction chamber, the preparation of the fluorine-containing fluorine-resistant coating is completed after cleaning.

[0039] Specifically, the sandblasting treatment of the workpiece surface in S2 is for workpieces with low requirements for workpiece surface flatness. If the workpiece surface flatness requirement is high, the workpiece surface does not need to be sandblasted. Since sandblasting increases the roughness of the workpiece surface, it is not easy to sandblast the workpiece surface with high requirements for workpiece surface flatness.

[0040] Specifically, when the workpiece is cured in S4, the reaction chamber needs to be in a vacuum state, so that the workpiece is in a vacuum state. By placing the vacuum device in the reaction chamber in a vacuum state, the workpiece is placed in a vacuum state, thereby improving the curing effect of the fluorine-resistant coating containing fluorine ions on the surface of the workpiece.

[0041] Specifically, when the workpiece is cured in S4, the reaction chamber is within a specific temperature range, and the workpiece is cured for a certain time within the specific temperature range. Placing the workpiece in the reaction chamber, under specific temperature and time conditions, improves the curing effect of the fluorine-resistant coating containing fluorine ions on the surface of the workpiece.

[0042] Preferably, the temperature of the reaction chamber is controlled at 430-470° C. When the workpiece is cured, the temperature of the reaction chamber is controlled at 430-470° C. Within this temperature range, the oxidation effect of the fluorine-resistant coating containing fluorine ions is optimal.

[0043] Preferably, the workpiece curing time is 4 to 5 hours while the reaction chamber temperature remains unchanged. When the workpiece is cured, the workpiece is cured for 4 to 5 hours at a temperature range of 430 to 470° C., so that the oxidation effect of the fluorine-resistant coating containing fluorine ions is optimal.

[0044] When cleaning the workpiece in S5, a multiple cleaning method is used to clean the workpiece. The multiple cleaning method ensures that the waste on the surface of the workpiece is cleaned.

[0045] Specifically, the multiple cleaning methods use deionized high-pressure water washing and ultrasonic cleaning. First, the workpiece is washed with deionized high-pressure water, and then the surface of the workpiece is cleaned again with ultrasonic waves after the deionized water washing is completed. The surface of the workpiece that has been cured is initially cleaned with deionized water, and then the surface of the workpiece is cleaned again with ultrasonic waves, so that the waste on the surface of the workpiece is cleaned.

[0046] The fluorine-resistant coating containing fluorine ions is prepared to form an aluminum fluoride film on the surface of the aluminum substrate. The fluorine-resistant coating containing fluorine ions is prepared to isolate the aluminum substrate from corrosion by F- ions in the PECVD chamber to ensure the service life of the chamber and aluminum alloy parts.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] (1) The obtained film layer is a growth film layer with uniform thickness and good density;

[0049] (2) The interlayer bonding force is good, which can provide good protection for the base material during use, and the film layer is not easy to fall off;

[0050] (3) The manufacturing process is simple and the reagents used are of low value;

[0051] (4) The equipment used is simple and the steps are few, which can greatly reduce the production cost.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A process for preparing a fluorine-resistant coating containing fluorine ions, characterized in that: The following steps are involved: S1. Grind and polish the surface of the workpiece to remove the surface oxide layer; S2, sandblasting the workpiece; S3, coating PVDF on the surface of the workpiece; S4, placing the workpiece in the reaction chamber, allowing the workpiece to be cured in the reaction chamber so that F- is immersed in the surface of the aluminum substrate; S5. After the parts that have been cured in the reaction chamber are removed, they are cleaned. After the cleaning is completed, the fluorine-resistant coating containing fluorine ions on the surface of the workpiece can be prepared.

2. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 1, characterized in that: The sandblasting treatment of the workpiece surface in S2 is for workpieces with lower requirements on the flatness of the workpiece surface. If the flatness requirement on the workpiece surface is higher, the workpiece surface does not need to be sandblasted.

3. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 1, characterized in that: When the workpiece is cured in S4, the reaction chamber needs to be in a vacuum state so that the workpiece is in a vacuum state.

4. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 3, characterized in that: When the workpiece is cured in S4, the reaction chamber is within a specific temperature range, and the workpiece is cured within the specific temperature range for a certain period of time.

5. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 4, characterized in that: The temperature of the reaction chamber is controlled at 430-470°C.

6. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 5, characterized in that: The workpiece curing time is 4 to 5 hours when the temperature of the reaction chamber remains unchanged.

7. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 1, characterized in that: When the workpiece is cleaned in S5, a multiple cleaning method is used to clean the workpiece.

8. The process for preparing a fluorine-resistant coating containing fluorine ions according to claim 7, characterized in that: The multiple cleaning methods use deionized high-pressure water washing and ultrasonic cleaning. First, the workpiece is washed with deionized high-pressure water. After the deionized water washing is completed, the surface of the workpiece is cleaned again with ultrasonic waves.

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