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Film forming solution of aluminum material surface collaborative optimization type chromium-free yellow conversion film and method for preparing conversion film

A technology of collaborative optimization and conversion coating, applied in the direction of metal material coating process, etc., can solve the problems of difficult promotion of chromium-free chemical conversion treatment technology, inability to discover product quality problems in time, and difficulty in real-time online judgment, etc., and achieve a wide processing time range. , Excellent protective performance, stable effect of film-forming solution

Active Publication Date: 2016-11-09
GUANGZHOU HONGSHUO ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The conversion coating is colorless. From the long-term operating habits of workers, it is difficult to judge online in real time, and the quality problems of the product cannot be found in time, which brings great difficulties to the promotion of chromium-free chemical conversion treatment technology;
[0007] (2) The range of processing technology is narrow, and the processing time is generally 30s to 60s. In industrial production, it is difficult for workers to control the processing time, and a stopwatch is needed for timing, which is not conducive to production operations;

Method used

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  • Film forming solution of aluminum material surface collaborative optimization type chromium-free yellow conversion film and method for preparing conversion film
  • Film forming solution of aluminum material surface collaborative optimization type chromium-free yellow conversion film and method for preparing conversion film
  • Film forming solution of aluminum material surface collaborative optimization type chromium-free yellow conversion film and method for preparing conversion film

Examples

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Effect test

Embodiment 1

[0047] An embodiment of the film-forming solution of the synergistically optimized chromium-free yellow conversion film on the surface of aluminum-based materials described in the present invention, the film-forming solution contains components at the following concentrations:

[0048] Potassium molybdate 25ppm, fluotitanic acid 25ppm, tannic acid 50ppm, hydrofluoric acid 50ppm, disodium edetate 10ppm, sodium borate 20ppm, fatty alcohol polyoxyethylene ethers 5ppm.

[0049] Stir and dissolve each component in water, adjust the pH value of the solution to 3.0, add tap water until the volume of the film-forming solution is 1000 mL, and obtain the film-forming solution described in this example.

[0050] The method for preparing a chromium-free yellow conversion coating on the surface of aluminum-based materials by using the film-forming solution described in this embodiment includes the following steps:

[0051] (1) Pretreatment: ① Take a 50mm×100mm sample of aluminum-based mate...

Embodiment 2

[0057] An embodiment of the film-forming solution of the synergistically optimized chromium-free yellow conversion film on the surface of aluminum-based materials described in the present invention, the film-forming solution contains components at the following concentrations:

[0058] Sodium molybdate 50ppm, tannic acid 50ppm, hydrofluoric acid 60ppm, disodium edetate 20ppm, sodium silicate 40ppm, fatty alcohol polyoxyethylene ether 5ppm.

[0059] Stir and dissolve each component in water, adjust the pH value of the solution to 3.5, and add tap water until the volume of the film-forming solution is 1000 mL.

[0060] The method for preparing a chromium-free yellow conversion coating on the surface of aluminum-based materials by using the film-forming solution described in this embodiment includes the following steps:

[0061] (1) Pretreatment: ① Take a 50mm×100mm sample of aluminum-based material and punch a hole, and connect the aluminum wire at the hole; The erosion amount ...

Embodiment 3

[0066] An embodiment of the film-forming solution of the synergistically optimized chromium-free yellow conversion film on the surface of aluminum-based materials described in the present invention, the film-forming solution contains components at the following concentrations:

[0067] Sodium vanadate 25ppm, fluotitanic acid 75ppm, tannic acid 100ppm, hydrofluoric acid 100ppm, disodium edetate 50ppm, sodium borate 40ppm, sodium dodecylbenzenesulfonate 5ppm.

[0068] Stir and dissolve each component in water, adjust the pH value of the solution to 3.5, and add tap water until the volume of the film-forming solution is 1000 mL.

[0069] The method for preparing a chromium-free yellow conversion coating on the surface of aluminum-based materials by using the film-forming solution described in this embodiment includes the following steps:

[0070] (1) Pretreatment: ① Take a 50mm×100mm sample of aluminum-based material and punch a hole, and connect the aluminum wire at the hole; ② ...

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Abstract

The invention discloses a film forming solution of an aluminum material surface collaborative optimization type chromium-free yellow conversion film, and further discloses a method for preparing the aluminum material surface collaborative optimization type chromium-free yellow conversion film by adopting the film forming solution. The environment-friendly chromium-free yellow conversion film can be prepared on the surface of a treated aluminum material, and is high in bonding strength with a base body and an organic polymer coating and excellent in protective barrier, and the resistance to corrosion is also obviously improved.

Description

technical field [0001] The invention relates to a film-forming solution, in particular to a film-forming solution for a chromium-free yellow conversion film with synergistic optimization on the surface of an aluminum-based material and a method for preparing the conversion film. Background technique [0002] The chemical conversion treatment of aluminum is a chemical treatment process in which the surface of metal aluminum reacts with the chemical oxidant in the solution in the chemical conversion treatment solution, without the need to generate a chemical film by applying an external voltage. The chemical conversion coating of aluminum is mainly used to protect aluminum and its alloys from corrosion. It can be used as a coating for direct use or as the bottom layer of an organic polymer coating. It has great industrial significance and has been widely used. The thickness of the chemical conversion coating is much thinner than that of anodized coating, so its protection cann...

Claims

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Application Information

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IPC IPC(8): C23C22/44C23C22/34C23C22/73
CPCC23C22/34C23C22/44C23C22/73
Inventor 刘宁华
Owner GUANGZHOU HONGSHUO ENVIRONMENTAL TECH
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