Anti-corrosive Coating Compound Stabilization via Transition Metal Salts
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Solution Overview
Problem
Existing anti-corrosive coating compounds with metal particles face stability issues during use due to undesirable secondary reactions, and the use of boron-containing stabilizers is no longer viable due to toxicological concerns, limiting their service life to just a few hours or days.
Innovation Solution
Incorporating oxygen compounds or salts of transition metals, such as ammonium, alkaline, or earth alkaline salts of transition metal acids, into the coating compound to stabilize the bath and extend its service life without compromising cathodic corrosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If boron-containing compounds are used to stabilize coating compounds, then service life is extended, but toxicological concerns and legal requirements prevent their continued use
Solution Approach 1:
The invention changes the chemical composition parameter by replacing boron-containing stabilizers with compounds containing at least one element from groups 13-17 of the periodic table (such as aluminum, silicon, phosphorus, sulfur, chlorine, or their halides). This substitution maintains the stabilizing function while eliminating toxicological concerns associated with boron compounds.
2Device complexity
If coating compounds are used without stabilizers, then composition is simpler, but service life is reduced to just a few hours
Solution Approach 1:
The invention modifies the chemical composition by introducing specific compounds containing elements from groups 13-17 (such as aluminum compounds, silicon compounds, phosphorus compounds, sulfur compounds, or chlorine compounds). These compounds serve as stabilizers that prevent undesirable secondary reactions, extending service life from hours to at least 48 hours for coil-coating processes and several days for immersion baths.
Solution Approach 2:
The stabilizing compounds containing elements from groups 13-17 act as intermediaries that prevent direct harmful interactions between the coating compound components and the workpieces or liquid medium. These compounds intervene in the chemical environment to suppress undesirable secondary reactions, thereby extending the service life of the immersion bath while maintaining coating quality.
3Productivity
If coating compounds are used for extended periods, then productivity increases, but undesirable secondary reactions reduce service life
Solution Approach 1:
The invention changes the chemical composition parameter by incorporating stabilizing compounds containing elements from groups 13-17 (such as aluminum, silicon, phosphorus, sulfur, or chlorine compounds). These compounds chemically stabilize the coating compound, preventing undesirable secondary reactions that would otherwise occur during extended use, thereby enabling both high productivity and maintained reliability over at least 48 hours or several days depending on application.
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 addition of these salts significantly extends the bath stability of the coating compound, allowing it to be usable for at least 48 hours in coil-coating processes and several days in immersion baths, while maintaining effective corrosion protection.
Implementation Method 1
component III which comprises an oxygen compound or a mixture of oxygen compounds of the subgroup elements, namely ammonium, alkaline or earth alkaline salts of an acid of a transition metal
Implementation Method 2
They primarily contain metal particles for the cathodic corrosion protection, for the most part zinc and/or aluminum particles or zinc alloy particles
Data Source
AI summary
An anti-corrosive coating compound with: component I: cathodically active metal particles and component II: binder in the presence of water. In order to improve the service life of the coating compound, it is provided that an oxygen compound or a mixture of oxygen compounds of the subgroup elements, namely ammonium, alkaline or earth alkaline salts of an acid of a transition metal, is added as component III. The invention further relates to a method for producing an anti-corrosive coating compound, a workpiece coated with the anti-corrosive coating compound and the use of an oxygen compound or a mixture of oxygen compounds of the subgroup elements in an anti-corrosive coating compound.