Acidic cleaning solution for aluminum-based metal materials

The acidic cleaning solution with specific inorganic acids and surfactants with varying cloud points addresses the foaming issue in aluminum-based metal cleaning, ensuring effective cleaning and cost reduction by suppressing foam formation.

JP2026110926AActive Publication Date: 2026-07-03NIPPON PAINT SURF CHEM CO LTD
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Patent Information

Application Number
JP2024225965
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2026-07-03
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

Existing cleaning solutions for aluminum-based metal materials foam excessively, making the cleaning process difficult and costly, especially when performed at low temperatures, and there is a need for a solution that can suppress foaming while maintaining desirable cleaning performance.

Method used

An acidic cleaning solution comprising specific ratios of inorganic acids, trivalent iron ions, and surfactants with varying cloud points to achieve effective cleaning while minimizing foaming, using sulfuric acid, nitric acid, or phosphoric acid, trivalent iron ions, and a combination of polyoxyalkylene alkyl ethers with different cloud points to control foaming and enhance cleaning efficacy.

Benefits of technology

The solution effectively suppresses foaming and achieves desirable cleaning performance, including efficient removal of oils and smut, reducing operational costs and environmental impact.

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Abstract

To provide an acidic cleaning solution for aluminum-based metal materials that can achieve desirable cleaning properties while suppressing foaming. [Solution] An acidic cleaning solution for aluminum-based metal materials comprising: 0.01 g / L to 25 g / L of at least one inorganic acid selected from the group consisting of sulfuric acid, nitric acid, nitrite, and phosphoric acid; 0.05 g / L to 4.0 g / L of trivalent iron ions; and 0.1 g / L to 10 g / L of a surfactant, wherein the surfactant comprises: surfactant A: a polyoxyalkylene alkyl ether with a cloud point of 80°C or higher; surfactant B: a polyoxyalkylene alkyl ether with a cloud point of 50°C to 60°C; and surfactant C: a polyoxyalkylene alkyl ether with a cloud point of 40°C or lower.
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