Highly lubricious nickel-free hole sealant, preparation method and application thereof

By combining zirconium salts, cobalt salts, lithium salts, and polymer lubricants, the problem of synergistic optimization of sealing performance and lubrication in the treatment of aluminum and aluminum alloy anodized films with nickel-free sealing agents was solved, achieving a high-end surface treatment effect with corrosion resistance, low friction, and smooth feel.

CN121250498BActive Publication Date: 2026-06-05HEFEI STEKAI NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI STEKAI NEW MATERIALS CO LTD
Filing Date
2025-12-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing nickel-free sealing agents cannot achieve both excellent sealing performance and high surface lubricity in the treatment of aluminum and aluminum alloy anodized films, resulting in a high coefficient of friction, a dry or sticky feel, and failing to meet the sensory requirements of high-end products. At the same time, some additives may affect the stability of the sealing solution and the dyeing effect.

Method used

Using a combination of zirconium salt and/or cobalt salt with lithium salt as the main sealing component, combined with polymer lubricants such as polytetrafluoroethylene micro powder and waterborne polyurethane dispersion, along with organophosphonic acid compounds and nonionic surfactants, a dense lubricating layer is formed by precisely controlling the pH value, achieving efficient sealing and low friction.

Benefits of technology

It achieves a combination of strong corrosion resistance, low coefficient of friction, and smooth feel, with high sealing quality and good wear resistance. It is suitable for high-end consumer electronics and automotive interior parts, and has little impact on the color of the dyed oxide film.

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Abstract

The present application relates to a kind of high lubrication nickel-free pore sealing agent and its preparation method and application, belong to metal surface treatment technical field.The present application is by zirconium salt and / or cobalt salt, lithium salt as main pore sealing component, complex organic phosphonic acid synergistic stabilizer and non-ionic surfactant, and introduce polytetrafluoroethylene micro powder and other polymer lubricant, in realizing high-efficiency hydrolysis and deposition pore sealing, while forming dense and firm lubricating layer in the surface and pore of oxide film.Pore sealing agent does not contain nickel and other harmful heavy metals, after pore sealing, excellent corrosion resistance, can pass through ≥96 hours neutral salt spray test, while significantly reducing surface friction coefficient to 0.15 below, give aluminum and aluminum alloy anodizing film extremely smooth hand feeling and excellent scratch resistance, especially suitable for the field such as consumer electronics, automotive interior, which require high touch.
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