Anticorrosion coating, cookware and method of manufacturing cookware

CN117702040BActive Publication Date: 2026-06-19WUHAN SUPOR COOKWARE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN SUPOR COOKWARE
Filing Date
2023-12-27
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing anti-corrosion coatings for cookware are susceptible to penetration by corrosive media and have insufficient corrosion resistance. In particular, the thin spots of the nitrogen/oxide film layer are prone to pitting corrosion, and sprayed organic coatings are prone to high-temperature aging and scratches.

Method used

A dense amorphous phase anti-corrosion coating is formed by using anti-corrosion particles with specific composition and content, including silicon dioxide, aluminum oxide, potassium oxide, sodium oxide, calcium oxide, magnesium oxide, iron oxide and ferrous oxide. The coating is then sprayed onto the substrate surface using plasma spraying technology and subjected to heat treatment to control porosity and amorphous phase volume ratio.

Benefits of technology

It forms a dense, corrosion-resistant coating, which improves the cookware's corrosion resistance and hardness, reduces porosity, extends its service life, and maintains a good appearance and easy-to-clean effect.

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Abstract

This application provides an anti-corrosion coating, cookware, and a method for manufacturing the cookware. The anti-corrosion particles, by weight percentage, comprise: 50% ≤ silicon dioxide ≤ 75%, 15% ≤ aluminum oxide ≤ 30%, 0.1% ≤ potassium oxide ≤ 2%, 0.1% ≤ sodium oxide ≤ 2%, 1% ≤ calcium oxide ≤ 10%, 0.5% ≤ magnesium oxide ≤ 3%, 0.2% ≤ titanium oxide ≤ 1.3%, and 5% ≤ iron oxide + ferrous oxide ≤ 10%. Cookware with an anti-corrosion coating exhibiting good corrosion resistance can be obtained according to the anti-corrosion particles of this application.
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