Aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution for ship and preparation method of conversion film

A chemical conversion coating and chemical conversion technology are applied in the field of marine aluminum alloy decoration and protective coating, which can solve the problem that the chemical conversion treatment process is difficult to meet the scratch resistance and other problems, and achieve the effect of good corrosion resistance.

Inactive Publication Date: 2012-05-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0004] The object of the present invention is to provide an environment-friendly anti-scratch and anti-fingerprint chromium-free chemical conversion liquid for marine aluminum alloy and its application in chemical conversion film, so as to

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  • Aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution for ship and preparation method of conversion film
  • Aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution for ship and preparation method of conversion film
  • Aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution for ship and preparation method of conversion film

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Embodiment Construction

[0027] The specific implementation method of the present invention is described in detail below, but not limited:

[0028] The marine aluminum alloy anti-scratch and anti-fingerprint chromium-free chemical conversion liquid of the present invention includes titanium salt, zirconium salt, silicon compound, accelerator, surfactant, etc., and the solvent is water. The anti-scratch and anti-fingerprint chrome-free chemical conversion fluid for marine aluminum alloy is uniformly mixed with titanium salt, zirconium salt, silicon compound, accelerator, pH regulator, surfactant and water. A pH regulator is used to adjust the pH value of the chromium-free chemical conversion solution to 1.0-5.0, preferably 2.0-4.5, most preferably 2.5-3.5.

[0029] Using the anti-scratch and anti-fingerprint chromium-free chemical conversion liquid for marine aluminum alloy, the film-forming process steps of the chromium-free and phosphorus-free nanoscale chemical conversion film include: degreasing→wa...

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Abstract

The invention relates to the field of aluminum alloy decoration and protection coatings for ships, in particular to an aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution for a ship and application of the aluminum alloy scratch resistant and fingerprint resistant chromium-free chemical conversion solution to a chemical conversion film. The chemical conversion solution contains titanium salts, zirconium salts, a silicon compound, an accelerator, a surfactant and the balance water, wherein the concentration of the titanium salts in the chromium-free chemical conversion solution ranges from 0.02 to 10g/L; the concentration of the zirconium salts in the chromium-free chemical conversion solution ranges from 0.1-10 g/L; the concentration of thesilicon compound in the chromium-free chemical conversion solution ranges from 2 to 25g/L; the concentration of the accelerator in the chromium-free chemical conversion solution ranges from 0.5-12 g/L; and the concentration of the surfactant in the chemical conversion solution ranges 0.1 to 10g/L. Chemical conversion films are formed on the surfaces of 5xxx or 6xxx series aluminum alloys by adopting an impregnating, brush coating, roller coating or spraying mode; and the chemical conversion films have favorable corrosion resistance, scratch resistance and fingerprint resistance and can be used as the surface decoration and protection coating of the aluminum alloy for the ship.

Description

technical field [0001] The invention relates to the field of marine aluminum alloy decoration and protective coatings, in particular to a marine aluminum alloy environment-friendly anti-scratch, fingerprint-resistant chromium-free chemical conversion liquid and its application in chemical conversion film (ie: preparation of chemical conversion film method). Background technique [0002] 5xxx and 6xxx aluminum alloys have been widely used in ship structural materials in recent years due to their good corrosion resistance, weldability and mechanical properties. Since the oxide film formed spontaneously by aluminum alloy is relatively thin, it cannot meet the requirements of use in harsh environments such as oceans. Due to the erosion of seawater and hot and humid marine atmosphere, the exposed aluminum alloy surface will be corroded and corrosion pits will appear, and a gravel-like white powdery corrosion product will be formed on the entire surface, which will seriously affe...

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Application Information

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IPC IPC(8): C23C22/34C23C22/73
CPCC23C22/34C23C22/73
Inventor 管勇刘斌张君男严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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