Treatment method of etching surface of aluminum antenna

Abstract

The present invention relates to the technical field of antenna manufacturing, and provides a method for treating an etched surface of an aluminum antenna, comprising the following steps: pre-treating the surface to remove impurities on the antenna surface; specifically, cleaning the etched surface of the antenna with a cleaning agent, wherein the cleaning agent temperature is 20 to 30°C and the spray pressure is 1.0 to 1.5 kg / cm 2 , the cleaning time is 30 to 60 seconds; surface anti-corrosion treatment is performed to form a protective layer on the surface of the antenna. Specifically, the antenna etching surface is treated with an anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20 to 30°C, and the spraying pressure is 0.5 to 1.0 kg / cm 2 , the cleaning time is 60 to 90 seconds; and the antiseptic solution is a mixture of 90% to 100% nitric acid, 5% to 10% hydrofluoric acid and 5% to 6% citric acid in a mass ratio of 80:10:10 to 98:1:1. The antenna treated by the method for treating the etching surface of the aluminum antenna of the present application can effectively reduce the occurrence of passive intermodulation.

Description

Technical Field

[0001] The invention relates to the technical field of antenna manufacturing, and in particular provides a method for processing an etched surface of an aluminum antenna. Background Art

[0002] In wireless communication systems, as the amount of voice and data information that needs to be transmitted within a fixed bandwidth increases, passive intermodulation becomes an important factor limiting system capacity.

[0003] Passive intermodulation refers to the mixing of two or more frequencies in a nonlinear device to produce spurious signals. The etched antenna surface is easily oxidized, and an aluminum metal film oxide layer is formed on the surface. The oxide layer is easy to absorb impurities. At the same time, the antenna surface is prone to unevenness after oxidation. Based on the above, passive intermodulation is easy to occur. Summary of the invention

[0004] The purpose of the present invention is to provide a method for processing an etched surface of an aluminum antenna, aiming to solve the problem that passive intermodulation is prone to occur on the etched surface of the existing aluminum antenna.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a method for processing the etched surface of an aluminum antenna, the steps of the method for processing the etched surface of an aluminum antenna are as follows:

[0006] Surface pretreatment: cleaning the antenna etched surface with a cleaning agent. The cleaning agent temperature is 20-30°C and the spray pressure is 1.0-1.5kg / cm 2 , cleaning time is 30 to 60 seconds;

[0007] Surface anti-corrosion treatment: the antenna etching surface is treated with anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20-30℃, and the spraying pressure is 0.5-1.0kg / cm 2 , cleaning time is 60~90s;

[0008] The preservative liquid is prepared by mixing nitric acid with a concentration of 90% to 100%, hydrofluoric acid with a concentration of 5% to 10%, and citric acid with a concentration of 5% to 6%, in a mass ratio of 80:10:10 to 98:1:1.

[0009] Beneficial effects of the present invention: The method for treating the etched surface of an aluminum antenna provided by the present invention is carried out in the following steps in sequence: performing surface pretreatment on the etched antenna to remove impurities on the antenna surface, such as grease and particles; in this step, specifically, the antenna etched surface is cleaned by a cleaning agent, and the temperature of the cleaning agent is 20 to 30°C, and the spray pressure is 1.0 to 1.5 kg / cm 2, the cleaning time is 30 to 60 seconds; then, the surface of the cleaned antenna is subjected to surface anti-corrosion treatment, thereby forming a protective layer on the surface of the antenna. In this step, specifically, the etched surface of the antenna is treated with an anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20 to 30°C, and the spray pressure is 0.5 to 1.0 kg / cm 2 , the cleaning time is 60 to 90 seconds; and the antiseptic solution is a mixture of 90% to 100% nitric acid, 5% to 10% hydrofluoric acid and 5% to 6% citric acid in a mass ratio of 80:10:10 to 98:1:1. After the above steps, a protective layer is formed on the surface of the etched antenna, which effectively blocks the oxidation corrosion of the aluminum antenna surface, ensures the flatness of the antenna etching surface, and reduces the adsorption capacity of impurities. In this way, the antenna treated by the method for treating the etching surface of the aluminum antenna of the present application can effectively reduce the occurrence of passive intermodulation.

[0010] In one embodiment, after the surface anticorrosion treatment step, water washing is also included, the water washing temperature is 20-30°C, and the spraying pressure is 1.0-1.5 kg / cm 2 , the cleaning time is 30 to 60 seconds.

[0011] In one embodiment, after the water washing step, a surface drying process is included, wherein the surface drying process includes air blowing and drying; wherein the air pressure of the air blowing is 2.0 to 2.5 kg / cm 2 The drying temperature is 70-80°C.

[0012] In one embodiment, the cleaning agent is an acidic cleaning agent, and the acidic cleaning agent is citric acid with a concentration of 5% to 6%; or,

[0013] The cleaning agent is an alkaline cleaning agent, and the alkaline cleaning agent is a sodium carbonate solution with a concentration of 2% to 5%.

[0014] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 80:10:10, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

[0015] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 85:7.5:7.5, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

[0016] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

[0017] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

[0018] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 0.5 kg / cm 2 , the cleaning time is 90s.

[0019] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 60s. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A flowchart of a method for processing an etched surface of an aluminum antenna provided by an embodiment of the present invention;

[0022] Figure 2 Another flow chart of a method for processing an etched surface of an aluminum antenna provided by an embodiment of the present invention;

[0023] Figure 3 Another flow chart of the method for processing the etched surface of an aluminum antenna provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figure 1 The method for processing the etched surface of the aluminum antenna of the present application comprises the following steps:

[0029] S001. Surface pretreatment: cleaning the antenna etched surface with a cleaning agent. The cleaning agent temperature is 20-30°C and the spray pressure is 1.0-1.5kg / cm 2 , the cleaning time is 30 to 60 seconds.

[0030] Surface pretreatment is to remove impurities and particles on the antenna etching surface to prepare for subsequent processes. Among them, the cleaning agent can be selected according to the actual situation of the antenna surface. Specifically, the cleaning agent can be an acidic cleaning agent or an alkaline cleaning agent.

[0031] For example, the cleaning agent is an acidic cleaning agent, and the acidic cleaning agent is citric acid with a concentration of 5% to 6%. Citric acid is an organic acid, and the citric acid with the above concentration does not react with the aluminum antenna, while being able to remove oxides on the surface of the antenna.

[0032] For example, the cleaning agent is an alkaline cleaning agent, which is a sodium carbonate solution with a concentration of 2% to 5%. Similarly, the sodium carbonate solution does not react with the aluminum antenna, and at the same time, it can remove grease impurities on the surface of the antenna.

[0033] Of course, after cleaning with the corresponding acidic or alkaline cleaning agent, a neutralization cleaning or direct water washing step can be added after this step to prepare for the subsequent process.

[0034] S002, surface anti-corrosion treatment, the antenna etching surface is treated with anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20-30℃, and the spraying pressure is 0.5-1.0kg / cm 2 , cleaning time is 60~90s;

[0035] The preservative liquid is prepared by mixing nitric acid with a concentration of 90% to 100%, hydrofluoric acid with a concentration of 5% to 10%, and citric acid with a concentration of 5% to 6%, in a mass ratio of 80:10:10 to 98:1:1.

[0036] Understandably, high concentrations of nitric acid react with the aluminum antenna to form a dense aluminum oxide layer on its surface, effectively preventing oxidation and corrosion.

[0037] The method for treating the etched surface of an aluminum antenna provided by the present invention is carried out in the following steps in sequence: the etched antenna is subjected to surface pretreatment to remove impurities on the antenna surface, such as grease and particles; in this step, the antenna etched surface is cleaned by a cleaning agent, and the temperature of the cleaning agent is 20 to 30° C., and the spray pressure is 1.0 to 1.5 kg / cm 2 , the cleaning time is 30 to 60 seconds; then, the surface of the cleaned antenna is subjected to surface anti-corrosion treatment, thereby forming a protective layer on the surface of the antenna. In this step, specifically, the etched surface of the antenna is treated with an anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20 to 30°C, and the spray pressure is 0.5 to 1.0 kg / cm 2 , the cleaning time is 60 to 90 seconds; and the antiseptic solution is a mixture of 90% to 100% nitric acid, 5% to 10% hydrofluoric acid and 5% to 6% citric acid in a mass ratio of 80:10:10 to 98:1:1. After the above steps, a protective layer is formed on the surface of the etched antenna, which effectively blocks the oxidation corrosion of the aluminum antenna surface, ensures the flatness of the antenna etching surface, and reduces the adsorption capacity of impurities. In this way, the antenna treated by the method for treating the etching surface of the aluminum antenna of the present application can effectively reduce the occurrence of passive intermodulation.

[0038] Please refer to Figure 2 In this embodiment, water washing is also included after the surface anti-corrosion treatment step.

[0039] S003, washing;

[0040] The water washing temperature is 20~30℃, and the spraying pressure is 1.0~1.5kg / cm 2 , the cleaning time is 30 to 60 seconds. It can be understood that the antiseptic liquid remaining on the antenna surface in the previous process is removed through the water washing step.

[0041] Please refer to Figure 3 In this embodiment, a surface drying process is included after the water washing step.

[0042] S004, surface drying treatment;

[0043] The surface drying process includes air blowing and drying; the air pressure of the air blowing is 2.0-2.5 kg / cm 2 The drying temperature is 70-80° C. It can be understood that, firstly, the moisture on the antenna surface is removed by the air blowing process to shorten the drying time, and secondly, the drying process is used to accelerate the drying speed of the antenna surface.

[0044] Embodiment 1

[0045] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 80:10:10, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s. Finally, the thickness of the formed protective layer is 20-25nm.

[0046] Embodiment 2

[0047] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 85:7.5:7.5, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s. Finally, the thickness of the formed protective layer is 25-28nm.

[0048] Embodiment 3

[0049] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s. Finally, the thickness of the formed protective layer is 30-35nm.

[0050] Embodiment 4

[0051] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s. Finally, the thickness of the formed protective layer is 30-34nm.

[0052] Embodiment 5

[0053] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 0.5 kg / cm 2 , the cleaning time is 90s. Finally, the thickness of the formed protective layer is 30-34nm.

[0054] Embodiment 6

[0055] In one embodiment, in the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 60s. Finally, the thickness of the formed protective layer is 28-32nm.

[0056] It can be seen from the implementation results of Examples 1 to 3 that the higher the concentration of the preservative liquid, the thicker the thickness of the protective layer; it can be seen from the implementation results of Examples 3 and 4 that the spraying temperature of the surface treatment agent has little effect on the thickness of the protective layer; it can be seen from the implementation results of Examples 3 and 5 that the spraying pressure of the surface treatment agent has little effect on the thickness of the protective layer; it can be seen from the implementation results of Examples 3 and 6 that the longer the spraying time of the surface treatment agent, the thicker the protective layer.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing an etched surface of an aluminum antenna, characterized in that: The steps of the method for processing the etched surface of the aluminum antenna are as follows: Surface pretreatment: cleaning the antenna etched surface with a cleaning agent. The cleaning agent temperature is 20-30°C and the spray pressure is 1.0-1.5kg / cm 2 , cleaning time is 30 to 60 seconds; Surface anti-corrosion treatment: the antenna etching surface is treated with anti-corrosion liquid, and the temperature of the anti-corrosion liquid is 20-30℃, and the spraying pressure is 0.5-1.0kg / cm 2 , cleaning time is 60~90s; The preservative liquid is prepared by mixing 90% to 100% nitric acid, 5% to 10% hydrofluoric acid and 5% to 6% citric acid in a mass ratio of 80:10:10 to 98:1:

1. The cleaning agent is an acidic cleaning agent, and the acidic cleaning agent is citric acid with a concentration of 5% to 6%; or, The cleaning agent is an alkaline cleaning agent, and the alkaline cleaning agent is a sodium carbonate solution with a concentration of 2% to 5%.

2. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: After the surface anticorrosion treatment step, water washing is also included, the water washing temperature is 20-30°C, and the spraying pressure is 1.0-1.5 kg / cm 2 , the cleaning time is 30 to 60 seconds.

3. The method for processing the etched surface of an aluminum antenna according to claim 2, characterized in that: After the water washing step, a surface drying process is included, and the surface drying process includes air blowing and drying; wherein the air pressure of the air blowing is 2.0-2.5 kg / cm 2 The drying temperature is 70-80°C.

4. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 80:10:10, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

5. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is nitric acid, hydrofluoric acid and citric acid in a mass ratio of 85: 7.5:7.5 mixture, the temperature of the preservative liquid is 20℃, and the spraying pressure is 1.0kg / cm 2 , the cleaning time is 90s.

6. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 20°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

7. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 90s.

8. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 0.5kg / cm 2 , the cleaning time is 90s.

9. The method for processing the etched surface of an aluminum antenna according to claim 1, characterized in that: In the surface antiseptic treatment step, the antiseptic solution is a mixture of nitric acid, hydrofluoric acid and citric acid in a mass ratio of 90:5:5, the temperature of the antiseptic solution is 30°C, and the spraying pressure is 1.0 kg / cm 2 , the cleaning time is 60s.

Images