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Bath solution replenishment and correction method applied to continuous production process of aluminum alloy titanium-zirconium conversion coating

A technology of production process and correction method, which is applied to the device for coating liquid on the surface, metal material coating process, coating and other directions to achieve the effect of consistent composition, strong operability, and improved production efficiency

Inactive Publication Date: 2018-07-27
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its treatment process contains hexavalent chromium and other highly toxic substances harmful to humans and the environment, which have been banned or required to be replaced by the laws and regulations of environmental protection departments in many countries, including the European Union. Therefore, the development of chromium-free conversion technology is an inevitable trend.

Method used

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  • Bath solution replenishment and correction method applied to continuous production process of aluminum alloy titanium-zirconium conversion coating
  • Bath solution replenishment and correction method applied to continuous production process of aluminum alloy titanium-zirconium conversion coating
  • Bath solution replenishment and correction method applied to continuous production process of aluminum alloy titanium-zirconium conversion coating

Examples

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Effect test

Embodiment 1

[0033] A method for adding and correcting bath liquid in the continuous production process of an aluminum alloy titanium / zirconium conversion film, comprising the following steps:

[0034] S1, sample preparation: 120 mm × 60 mm × 2 mm (length, width and height) size aluminum sheet was cut from 6063 aluminum alloy on the wire, each sample was punched at the corner, and the surface of the aluminum alloy was polished to 2000 with sandpaper #, and rinse it with tap water and dry it, and hang it with a thin wire at the punched hole.

[0035] S2, pretreatment: suspend the 6063 aluminum alloy sample in industrial acid and soak for 1.5min to degrease, rinse with tap water, then soak in mixed acid for 3min for activation treatment, and rinse with tap water; the composition of the industrial acid 80g / LH 2 SO 4 , 25g / L H 3 PO 4 , 10g / L HF, 0.5g / L OP-10 emulsifier, solvent is water; The composition of described mixed acid is 15g / LHNO 3 , 20g / L H 3 PO 4 , 25g / L H 2 SO 4 , the solv...

Embodiment 2

[0045] A method for adding and correcting bath liquid in the continuous production process of aluminum alloy titanium / zirconium conversion coating, specifically comprising the following steps:

[0046] S1, sample preparation: 120 mm×60 mm×2 mm size aluminum sheet is cut from 6063 aluminum alloy on the wire, each sample is punched at the corner, and the surface of the aluminum alloy is polished to 2000# with sandpaper, and rinsed with tap water Blow dry clean and hang with a thin wire on the hole punched out.

[0047] S2, pretreatment: suspend the 6063 aluminum alloy sample in industrial acid and soak for 1.5min to degrease, rinse with tap water, then soak in mixed acid for 3min for activation treatment, and rinse with tap water; the composition of the industrial acid 80 g / LH 2 SO 4 , 25 g / L H 3 PO 4 , 10 g / L HF, 0.5 g / L OP-10 emulsifier, solvent is water; The composition of described mixed acid is 15g / L HNO 3 , 20 g / L H 3 PO 4 , 25 g / L H 2 SO 4 , the solvent is water....

Embodiment 3

[0056] A method for adding and correcting bath liquid in the continuous production process of aluminum alloy titanium-zirconium conversion coating, specifically comprising the following steps:

[0057] 1 L of titanium-zirconium conversion solution was prepared, and continuous film-forming treatment was carried out on the surface of industrial pure aluminum. This method was used to supplement the conversion solution, and the obtained industrial pure aluminum-titanium-zirconium conversion film was dried and then electrostatically sprayed. The supplementary method adopted in this example is similar to that in Examples 1 and 2, except that the experimental substrate used is industrial pure aluminum.

[0058] The titanium-zirconium film on the aluminum plate on the surface of industrial pure aluminum obtained in Example 3 presents a uniform yellow color, and the organic coating covering it is uniform and bright black, and the film thickness of the titanium-zirconium film measured by...

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Abstract

The invention provides a bath solution replenishment and correction method applied to a continuous production process of an aluminum alloy titanium-zirconium conversion coating. The method comprises the following steps of: cutting aluminum alloy into samples which are 120 mm, 60 mm and 2 mm in size; pretreating the surfaces of the samples; performing conversion treatment on the surfaces of the samples; soaking, stewing and drying the samples in 1L of a titanium-zirconium conversion solution to obtain a conversion coating; taking every twenty treated samples as a batch; after the first batch ofsamples are completely treated in 1L of the titanium-zirconium conversion solution, adding 50 ml of a replenishing liquid A; and in subsequent treatment, adding 50 ml replenishing liquid B into the titanium-zirconium conversion solution after every batch of samples are treated so that the titanium-zirconium conversion solution can be continuously and cyclically used. According to the method, thetitanium-zirconium conversion solution is replenished in time to guarantee that the titanium-zirconium conversion solution can be continuously and cyclically used, and thus continuity of production ismaintained.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy surface treatment, and mainly relates to the surface corrosion and protection technology of aluminum alloy, in particular to the supplementation and protection of titanium-zirconium bath solution in the continuous industrial production process of an environment-friendly titanium / zirconium conversion treatment process for the surface of aluminum alloy. Calibration method. Background technique [0002] Aluminum alloy is widely used in construction, aerospace, military technology, automobile, navigation technology, 3C electronic products, medical and health and other fields because of its high specific strength, good shape processing performance, and excellent thermal and electrical conductivity. However, the standard electrode potential of aluminum is relatively negative, only -1.66 V, which is relatively active in thermodynamics. Under natural conditions, although a natural oxide film can be...

Claims

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Application Information

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IPC IPC(8): C23C22/44B05D1/06B05D7/14
CPCC23C22/44B05D1/06B05D7/14
Inventor 廖忠淼李文芳祝闻
Owner DONGGUAN UNIV OF TECH
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