Self-hardening zirconium-based steel blank anti-oxidation coating and application thereof

The self-hardening zirconium-based anti-oxidation coating for steel billets solves the problems of existing coatings peeling off at high temperatures and generating toxic substances, achieving highly efficient anti-oxidation, reducing billet oxidation loss and furnace blockage, and improving the metal yield of steel billets.

CN118222119BActive Publication Date: 2026-07-14SHANDONG IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG IRON & STEEL CO LTD
Filing Date
2024-03-19
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing anti-oxidation coatings are prone to peeling off at high temperatures, have poor thermal shock resistance, and produce toxic and harmful substances, thus failing to effectively prevent the oxidation and burning of steel billets.

Method used

The self-hardening zirconium-based steel billet anti-oxidation coating is composed of zircon powder, bauxite, magnesium olivine powder, lithium-based bentonite, sodium carboxymethyl cellulose and polyaluminum chloride. After spraying, it air dries naturally without baking, forming a dense protective film that is resistant to high temperatures and does not peel off.

Benefits of technology

During high-temperature heating, the coating does not peel off, significantly reducing oxidation loss, improving the metal yield of the billet, avoiding furnace blockage, and is environmentally friendly and non-toxic.

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Abstract

The application belongs to the technical field of steel industry, and particularly relates to a self-hardening zirconium-based steel billet anti-oxidation coating and application. The self-hardening zirconium-based steel billet anti-oxidation coating comprises the following raw materials in parts by weight: zirconium powder 20-70 parts, bauxite 30-60 parts, forsterite powder 10-30 parts, lithium-based bentonite 2-10 parts, sodium carboxymethyl cellulose 2-7 parts, polyaluminum chloride 1-6 parts and water 60-150 parts. The self-hardening zirconium-based steel billet anti-oxidation coating provided by the application has good heat resistance and thermal shock stability, avoids the problem that the coating falls off in the heating furnace when the steel billet is discharged, causes the heating furnace to be blocked, and increases the difficulty of cleaning.
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Citation Information

Patent Citations

  • Magnesium olivine modified powder coating and preparation method thereof

    CN102653640A