Aqueous Metal Coating Composition for Corrosion Protection
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Solution Overview
Problem
Current anti-corrosion coating systems for metal components, particularly steel, are complex, expensive, and fail to provide reliable protection against corrosion, especially on components with complex geometries and do not meet the DIN EN ISO 12944-2 C3 classification when using aqueous one-pot systems.
Innovation Solution
An aqueous composition comprising an organic binder, organic solvent, nitrophthalic acid, aromatic carboxylic acid, aliphatic carboxylic acid, orthophosphate compound, organically modified sheet silicate, and lamellar materials, which can be applied as a one-pot system without additional components, offering corrosion protection and color options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If epoxy primers and additional top coat are used for anti-corrosion coating, then corrosion protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple coating functions (primer and top coat) into a single aqueous composition that can be applied in one step. The composition contains both protective agents and color pigments, eliminating the need for separate primer and top coat applications while maintaining comprehensive corrosion protection.
Solution Approach 2:
The single aqueous composition performs multiple functions simultaneously: it provides corrosion protection through contained agents, delivers aesthetic appearance through pigments, and ensures proper adhesion to metal substrates. This multi-functional formulation replaces the traditional multi-layer system.
2Ease of operation
If generic anti-corrosion systems are used, then application simplicity is improved, but corrosion protection reliability deteriorates
Solution Approach 1:
The patent creates a composite aqueous composition integrating corrosion protective agents (such as phosphates, carboxylic acids, and inhibitors) with binding agents and pigments. This composite formulation delivers both the simplicity of a single-coat application and the reliable corrosion protection of multi-layer systems.
3Reliability
If high viscosity coating systems are used, then corrosion protection is improved, but edge alignment deteriorates causing thin coating on edges
Solution Approach 1:
The patent modifies the viscosity parameter of the coating composition to an optimal range that balances protective film formation with proper flow characteristics. The aqueous formulation achieves sufficient wetting and leveling to ensure uniform coating thickness on vertical edges and complex geometries while maintaining adequate film weight for corrosion protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition provides effective corrosion protection for metal and steel components with complex geometries, eliminating the need for multiple coating systems and pre-treatment steps, while allowing for easy application and color customization, achieving high corrosion resistance and meeting DIN EN ISO 12944-6 C3 standards.
Implementation Method 1
at least one organically modified sheet silicate component and/or at least one polyurethane thickener, h) at least one lamellar material of inorganic origin selected from the group consisting of mica, in particular micaceous iron oxide, kaolin, lamellar quartz, glass flakes (flakes) and sheet silicates or a mixture thereof
Implementation Method 2
c) at least one water-soluble form of nitrophthalic acid, d) at least one water-soluble form of an aromatic carboxylic acid, in particular at least one water-soluble form of an aromatic monocarboxylic acid e) at least one water-soluble form soluble form of an aliphatic C 6 to C 9 carboxylic acid
Implementation Method 3
f) at least one orthophosphate compound
Data Source
AI summary
The invention relates to an aqueous composition for metal protective coatings, comprising: a) at least one organic binder based on at least one water-dispersed or dispersible polymer formed from identical or different monomers, wherein at least one of the monomers is an acrylic ester, methacrylic ester, vinyl acetate, vinyl chloride, Versatate, acrylonitrile, or a vinylaromatic compound; b) at least one organic solvent and/or at least one film-forming agent; c) at least one water-soluble form of nitrophthalic acid; d) at least one water-soluble form of an aromatic carboxylic acid, in particular at least one water-soluble form of an aromatic monocarboxylic acid; e) at least one water-soluble form of an aliphatic C6 to C9 carboxylic acid, in particular at least one water-soluble form of an aliphatic C6 to C9 monocarboxylic acid; f) at least one orthophosphate compound.g) at least one organically modified layered silicate component and/or at least one polyurethane thickener, h) at least one platelet-shaped material of inorganic origin selected from the group consisting of mica, in particular iron mica, kaolin, platelet quartz, glass flakes, and layered silicates or a mixture thereof, and i) water. The invention further relates to a coating obtained from the aqueous composition according to the invention and a metal substrate comprising this coating. The invention also relates to the use of the aqueous coating composition according to the invention as a painter's, building, industrial, and consumer coating, as well as a method for coating metal substrates. Finally, the invention relates to a kit of parts.