A method for manufacturing an anodized film structure and an anodized film structure

By using a modified cerium salt-modified lithium salt synergistic sealing solution to form a dense cerium-lithium mixed hydroxide sealing layer on aluminum alloy anodic oxide film, the problems of high energy consumption, incomplete sealing, poor corrosion resistance and weak adhesion of existing processes are solved. This achieves efficient and environmentally friendly sealing of aluminum alloy anodic oxide film, which is suitable for aerospace, automobile manufacturing, building decoration, electronics and electrical appliances and hardware accessories.

CN122189798APending Publication Date: 2026-06-12XINYAO TECHNOLOGY (NANTONG) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINYAO TECHNOLOGY (NANTONG) CO LTD
Filing Date
2026-03-27
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing aluminum alloy anodized film sealing processes suffer from high energy consumption, incomplete sealing, poor corrosion resistance, weak adhesion, and insufficient environmental friendliness, failing to meet the protective performance requirements of high-end fields.

⚗Method used

A modified cerium salt-modified lithium salt synergistic sealing solution is used to form a dense cerium-lithium mixed hydroxide sealing layer in the nanopores of the anodic oxide film through in-situ hydrolysis and co-precipitation reaction at the interface, forming a three-layer composite anodic oxide film with strong bonding, high density, and strong corrosion resistance.

🎯Benefits of technology

It achieves a low-energy-consumption and environmentally friendly sealing process, resulting in a film with improved corrosion resistance and strong adhesion, meeting the requirements of high-end applications and suitable for large-scale industrial production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a manufacturing method of an anodic oxidation film structure and the anodic oxidation film structure, and belongs to the technical field of surface treatment. The application provides a three-layer composite structure which is composed of an aluminum alloy base material, an anodic oxidation base film layer and a cerium-lithium mixed hydroxide sealing layer. The structure is formed by in-situ hydrolysis co-precipitation reaction of modified cerium sulfate and modified lithium hydroxide in the nanopores and surface of the anodic oxidation film. The manufacturing method comprises base material pretreatment, anodic oxidation film forming, synergistic sealing liquid preparation, in-situ interface sealing treatment and post-treatment drying. The synergistic sealing liquid contains modified cerium salt, modified lithium salt, citric acid and boric acid, and is free of toxic heavy metals. The prepared anodic oxidation film structure has a neutral salt spray resistance time of greater than or equal to 300 h, an electrochemical impedance value of greater than or equal to 10<6> omega cm<2>, and a bonding strength of 0 grade, is environment-friendly and efficient, and is suitable for fields such as aerospace and automobile manufacturing.
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