Device and method for measuring weight of aluminum and aluminum alloy oxidation film

Abstract

The invention provides a method for measuring the weight of an aluminum and aluminum alloy oxidation film, which comprises the following steps of: 1, preparing a test piece, washing the aluminum or aluminum alloy test piece by using a solvent, dipping degreasing cotton in neutral soapy water to wipe the surface of the aluminum or aluminum alloy test piece, washing with flowing tap water, washing with distilled water, and airing; 2, hanging the aired test piece in a drying oven for drying, cooling to room temperature, and weighing the test piece; 3, carrying out oxidation treatment on the test piece according to a related oxidation process; 4, measuring the area of the oxidation film; 5, washing the test piece with distilled water, airing, drying the test piece in a drying oven, cooling to room temperature, and weighing the weight of the test piece; 6, calculating the weight of an oxidation film of the test piece; the invention further provides a device for measuring the weight of the aluminum and aluminum alloy oxidation film. The method has the advantages of rapidness, high efficiency, low cost, safety, environmental protection, simple operation and accurate determination result.

Description

Technical Field

[0001] The present application belongs to the field of testing technology, and in particular relates to a method for measuring the weight of an oxide film of aluminum and an aluminum alloy. Background Art

[0002] The weight of the oxide film is an important assessment indicator of the quality of the oxide film of aluminum and aluminum alloys. It reflects whether the control of the oxidation tank liquid used for oxidation meets the relevant technical requirements.

[0003] The method for determining the weight of the oxide film in relative technology adopts the weight loss method. The weight loss method has the following shortcomings: as the heating temperature rises, the film stripping and dissolution reaction accelerates, the concentration of the film stripping solution gradually decreases, and the dissolving power weakens, which affects the film stripping chemical reaction of the test piece. The measurement results fluctuate greatly, and the relative error exceeds 10% of the average value. Summary of the invention

[0004] Purpose of the invention: The present invention overcomes the above-mentioned shortcomings of the above-mentioned determination method and provides an accurate, environmentally friendly, low-cost, fast and efficient method for determining the weight of an oxide film.

[0005] In a first aspect, the present application provides a method for determining the weight of an oxide film of aluminum and aluminum alloys, the method comprising:

[0006] Step 1: Prepare aluminum or aluminum alloy test pieces, rinse them with solvent, and then wipe the surface of the aluminum or aluminum alloy test pieces with absorbent cotton dipped in neutral soapy water, first rinse them under running tap water, then rinse them with distilled water, and dry them;

[0007] Step 2: Hang the dried aluminum or aluminum alloy test piece in an oven to dry, cool it to room temperature, and weigh the aluminum or aluminum alloy test piece;

[0008] Step 3, oxidizing the aluminum or aluminum alloy test piece according to the relevant oxidation process;

[0009] Step 4: Use AI software tools to measure the area of ​​the oxide film;

[0010] Step 5: rinse the test piece with distilled water, let it air dry, then place the aluminum or aluminum alloy test piece in an oven to dry, cool to room temperature, and weigh the aluminum or aluminum alloy test piece;

[0011] Step 6. Calculate the oxide film weight of the aluminum or aluminum alloy test piece according to the following formula:

[0012] A=(m2-m1) / S

[0013] Where: A—Oxide film weight, mg / dm 2 ;

[0014] m1—weight of the test piece before oxidation, mg;

[0015] m2—weight of the test piece after oxidation, mg;

[0016] S—Oxide film area, dm 2 .

[0017] Preferably, the step 1 specifically includes:

[0018] Prepare at least 3 aluminum or aluminum alloy test pieces, rinse them with a solvent, then wipe the surface of the test piece with absorbent cotton dipped in neutral soapy water, rinse under running tap water for 5 to 10 minutes, then rinse with distilled water for 5 to 10 minutes, and dry.

[0019] Preferably, the aluminum or aluminum alloy test piece is square or rectangular, with a thickness of 0.5-7 mm; the solvent includes acetone solvent, cleaning gasoline, and ethyl acetate.

[0020] Preferably, the step 2 specifically includes:

[0021] Hang the dried aluminum or aluminum alloy test piece in a 93±6°C oven and dry for 30 minutes, cool it to room temperature, and weigh the aluminum or aluminum alloy test piece.

[0022] Preferably, the step 5 specifically includes:

[0023] Rinse the test piece with distilled water and let it air-dry for 5 to 10 minutes. Then place the aluminum or aluminum alloy test piece in an oven at 85 to 95°C to dry for 30 to 40 minutes. Cool it to room temperature and weigh the aluminum or aluminum alloy test piece.

[0024] Preferably, the step three specifically includes:

[0025] Cleaning: Clean the surface of the aluminum or aluminum alloy specimen to be treated thoroughly to remove grease and oxides;

[0026] Anodizing: Use aluminum or aluminum alloy test piece as anode, pass direct current in sulfuric acid solution, during anodizing, oxidation reaction will occur on the surface of aluminum or aluminum alloy test piece, forming an oxide film; chemical anodizing uses Arodin 1200S oxidation solution, place the test piece in Arodin 1200S oxidation solution at 26-31℃ for 0.5-3min, take it out and rinse it with distilled water for more than 2min, and then dry it at 50-60℃ for 1h;

[0027] Sealing film: The oxide film formed on the surface of the aluminum or aluminum alloy test piece after anodizing has good corrosion resistance and hardness, but there are also micropores. In order to increase the density of the oxide film and improve the corrosion resistance, hot water sealing, electrolytic sealing, or chemical sealing is used for sealing.

[0028] Cleaning and drying: Clean the surface of the treated aluminum or aluminum alloy test piece to remove residual sulfuric acid and chemical sealing agent, and then dry it.

[0029] Preferably, the step 4 specifically includes:

[0030] Place the anodized aluminum or aluminum alloy specimen on a glass washing table, open the AI ​​measurement software to measure the length and width of the aluminum or aluminum alloy specimen, and obtain the area of ​​the aluminum or aluminum alloy specimen.

[0031] In a second aspect, the present application further provides a device for measuring the weight of an aluminum and aluminum alloy oxide film, the device comprising:

[0032] An electric drill, arranged on the measuring device platform, and used for drilling holes on the aluminum or aluminum alloy test piece;

[0033] A glass hanger is arranged on the measuring device platform, and the glass hanger is used to hang the aluminum or aluminum alloy test piece with a hole punched;

[0034] A glass cleaning table, arranged on the measuring device platform, the glass cleaning table is used to clean the aluminum or aluminum alloy test piece and place the aluminum or aluminum alloy test piece when measuring the area of ​​the aluminum or aluminum alloy test piece;

[0035] An oven, arranged on the measuring device platform, and used for drying the aluminum or aluminum alloy test piece;

[0036] A balance, arranged on the measuring device platform, and used to measure the weight of the aluminum or aluminum alloy test piece;

[0037] A constant temperature electric furnace is arranged on the measuring device platform, and is used to provide a constant temperature bath to achieve the temperature conditions required for oxidation and preparation of neutral soap water.

[0038] Beneficial technical effects of this application:

[0039] The method provided by the present invention has the advantages of rapidity, high efficiency, low cost, safety, environmental protection, simple operation, and accurate measurement results. By adopting the weight gain method, the film stripping solution is no longer used, which avoids the health hazards to the measurement personnel and the disposal of the film stripping waste liquid. The use of AI measurement software also makes the measurement area of ​​the oxide film more convenient and accurate. The method has a wide range of applications and can be applied to the determination of the weight of oxide films such as sulfuric acid anodizing, chromic acid anodizing, and chemical oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flow chart of a method for determining the weight of an aluminum and aluminum alloy oxide film provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] See also Figure 1 The present application provides a method for determining the weight of an aluminum and aluminum alloy oxide film, comprising:

[0042] Step 1: Prepare the test piece. Rinse the aluminum or aluminum alloy test piece with a solvent, then wipe the surface of the aluminum or aluminum alloy test piece with absorbent cotton dipped in neutral soapy water, first rinse it under running tap water, then rinse it with distilled water, and dry it;

[0043] Step 2: Hang the dried test piece in an oven to dry, cool it to room temperature, and weigh the test piece;

[0044] Step 3, oxidizing the test piece according to the relevant oxidation process; Step 4, measuring the area of ​​the oxide film;

[0045] Step 5: Rinse the test piece with distilled water, let it air dry, then place the test piece in an oven to dry, cool to room temperature, and weigh the test piece;

[0046] Step 6: Calculate the weight of the oxide film on the test piece.

[0047] This application solves the problems of large relative error in the results of existing measurement methods, harm to the health of measurement personnel, high cost of waste liquid disposal, and low measurement efficiency. This method has the advantages of fast and efficient, low cost, safety and environmental protection, simple operation, accurate data, etc. It can meet the requirements of on-site control and has certain promotion and application value.

[0048] In other embodiments of the present application, the device and method provided by the present invention adopt a weight gain method, and the method mainly comprises the following steps:

[0049] Step 1: Prepare at least 3 aluminum test pieces. Rinse the test pieces with a solvent, then wipe the surface of the test pieces with absorbent cotton dipped in neutral soapy water, rinse under running tap water for (5-10) minutes, then rinse with distilled water for (5-10) minutes, and dry;

[0050] The test piece is rectangular or square, and a hole is punched at one end 5 mm away from the edge; preparation of neutral soap water: crush the soap, dissolve it with distilled water under heating conditions, and after cooling slightly, add an appropriate amount of dilute sulfuric acid solution to adjust the pH value of the soap water to 6.5-7.0.

[0051] Step 2: Hang the dried test piece in a (93±6)℃ oven for 30 minutes, cool it to room temperature, and weigh the test piece;

[0052] The test piece was hung in an oven with a glass pendant, and the temperature was gradually raised to (93±6)°C within 30 minutes and maintained for 30 minutes. After being taken out, it was quickly placed in a desiccator and cooled to room temperature, and the weight of the test piece was weighed with a balance.

[0053] Step 3, oxidizing the test piece according to the relevant oxidation process;

[0054] Among them, the aluminum or aluminum alloy test piece is used as the anode, and a direct current is passed through the sulfuric acid solution. During the anodizing process, an oxidation reaction will occur on the surface of the aluminum or aluminum alloy test piece to form an oxide film; chemical anodizing uses Arodin 1200S oxidation liquid, and the test piece is placed in Arodin 1200S oxidation liquid at 26-31°C for 0.5-3min, and then rinsed with distilled water for more than 2min, and then dried at a temperature of 50-60°C for 1h.

[0055] Step 4: Use AI software tools to measure the area of ​​the oxide film;

[0056] Among them, the anodized aluminum or aluminum alloy test piece is placed on a glass washing table, and the AI ​​measurement software is opened to measure the length and width of the aluminum or aluminum alloy test piece to obtain the area of ​​the aluminum or aluminum alloy test piece.

[0057] Step 5: Rinse the test piece with distilled water, let it dry for (5-10) min, then place the test piece in an oven at (85-95) °C to dry for 30 min, cool to room temperature, and weigh the test piece;

[0058] The test piece was rinsed with distilled water, and hung on a glass hanger for 5 to 10 minutes. The temperature was gradually increased to (93±6)°C within 30 minutes and maintained for 30 minutes. After being taken out, it was quickly placed in a desiccator to cool to room temperature, and the weight of the test piece was weighed with a balance.

[0059] Step 6. Calculate the oxide film weight of the test piece according to the following formula:

[0060] A=(m2-m1) / S

[0061] Where: A—Oxide film weight, mg / dm 2 ;

[0062] m1—weight of the test piece before oxidation, mg;

[0063] m2—weight of the test piece after oxidation, mg;

[0064] S—Oxide film area, dm 2 .

[0065] The average weight of the oxide film of each test piece is taken as the measurement result, and the difference between the weight of the oxide film of each test piece and the average weight does not exceed 10% of the average weight.

[0066] In particular: the method adopts a weight gain method; wipes the surface of the test piece with absorbent cotton dipped in neutral soapy water; uses an AI software tool to measure the area of ​​the oxide film; and calculates the weight of the oxide film of the test piece according to the formula in step six.

[0067] This application solves the problems of large relative error in the results of existing measurement methods, harm to the health of measurement personnel, high cost of waste liquid disposal, and low measurement efficiency. This method has the advantages of fast and efficient, low cost, safety and environmental protection, simple operation, accurate data, etc. It can meet the requirements of on-site control and has certain promotion and application value.

Claims

1. A method for measuring the weight of an aluminum and aluminum alloy oxide film, characterized in that: The method comprises: Step 1: Prepare aluminum or aluminum alloy test pieces, rinse them with solvent, and then wipe the surface of the aluminum or aluminum alloy test pieces with absorbent cotton dipped in neutral soapy water, first rinse them under running tap water, then rinse them with distilled water, and dry them; Step 2: Hang the dried aluminum or aluminum alloy test piece in an oven to dry, cool it to room temperature, and weigh the aluminum or aluminum alloy test piece; Step 3, oxidizing the aluminum or aluminum alloy test piece according to the relevant oxidation process; Step 4: Use AI software tools to measure the area of ​​the oxide film; Step 5: rinse the test piece with distilled water, let it air dry, then place the aluminum or aluminum alloy test piece in an oven to dry, cool to room temperature, and weigh the aluminum or aluminum alloy test piece; Step 6. Calculate the oxide film weight of the aluminum or aluminum alloy test piece according to the following formula: A=(m2-m1) / S Where: A—Oxide film weight, mg / dm 2 ; m1—weight of the test piece before oxidation, mg; m2—weight of the test piece after oxidation, mg; S—Oxide film area, dm 2 .

2. The method according to claim 1, characterized in that The step 1 specifically includes: Prepare at least 3 aluminum or aluminum alloy test pieces, rinse them with a solvent, then wipe the surface of the test piece with absorbent cotton dipped in neutral soapy water, rinse under running tap water for 5 to 10 minutes, then rinse with distilled water for 5 to 10 minutes, and dry.

3. The method according to claim 2, characterized in that The aluminum or aluminum alloy test piece is square or rectangular, with a thickness of 0.5-7 mm; the solvent includes acetone solvent, cleaning gasoline, and ethyl acetate.

4. The method according to claim 1, characterized in that The step 2 specifically includes: Hang the dried aluminum or aluminum alloy test piece in a 93±6°C oven and dry for 30 minutes, cool it to room temperature, and weigh the aluminum or aluminum alloy test piece.

5. The method according to claim 1, characterized in that The step 5 specifically includes: Rinse the test piece with distilled water and let it air-dry for 5 to 10 minutes. Then place the aluminum or aluminum alloy test piece in an oven at 85 to 95°C to dry for 30 to 40 minutes. Cool it to room temperature and weigh the aluminum or aluminum alloy test piece.

6. The method according to claim 1, characterized in that The step three specifically includes: Cleaning: Clean the surface of the aluminum or aluminum alloy specimen to be treated thoroughly to remove grease and oxides; Anodizing: Use aluminum or aluminum alloy test piece as anode, pass direct current in sulfuric acid solution, during anodizing, oxidation reaction will occur on the surface of aluminum or aluminum alloy test piece, forming an oxide film; chemical anodizing uses Arodin 1200S oxidation solution, place the test piece in Arodin 1200S oxidation solution at 26-31℃ for 0.5-3min, take it out and rinse it with distilled water for more than 2min, and then dry it at 50-60℃ for 1h; Sealing film: The oxide film formed on the surface of the aluminum or aluminum alloy test piece after anodizing has good corrosion resistance and hardness, but there are also micropores. In order to increase the density of the oxide film and improve the corrosion resistance, hot water sealing, electrolytic sealing, or chemical sealing is used for sealing. Cleaning and drying: Clean the surface of the treated aluminum or aluminum alloy test piece to remove residual sulfuric acid and chemical sealing agent, and then dry it.

7. The method according to claim 1, characterized in that The step 4 specifically includes: Place the anodized aluminum or aluminum alloy specimen on a glass washing table, open the AI ​​measurement software to measure the length and width of the aluminum or aluminum alloy specimen, and obtain the area of ​​the aluminum or aluminum alloy specimen.

8. A device for measuring the weight of aluminum and aluminum alloy oxide films, characterized in that: The measuring device comprises: An electric drill, arranged on the measuring device platform, and used for drilling holes on the aluminum or aluminum alloy test piece; A glass hanger is arranged on the measuring device platform, and the glass hanger is used to hang the aluminum or aluminum alloy test piece with a hole punched; A glass cleaning table, arranged on the measuring device platform, and used for cleaning the aluminum or aluminum alloy test piece and placing the aluminum or aluminum alloy test piece when measuring the area of ​​the aluminum or aluminum alloy test piece; An oven, arranged on the measuring device platform, and used for drying the aluminum or aluminum alloy test piece; A balance, arranged on the measuring device platform, and used to measure the weight of the aluminum or aluminum alloy test piece; A constant temperature electric furnace is arranged on the measuring device platform, and is used to provide a constant temperature bath to achieve the temperature conditions required for oxidation and preparation of neutral soap water.

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