Porous Single-Layer Spring Coating for Stone Impact Resistance
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Solution Overview
Problem
Conventional electrically conductive components, such as springs and torsion bars for motor vehicles, face inadequate stone impact and low-temperature impact resistance, particularly at temperatures below freezing, leading to surface damage, corrosion, and delamination of coatings.
Innovation Solution
A single-layer coating composed of a powder composition with a porelike layer structure, applied using a method that includes pretreating, drying, powder-coating, and crosslinking, which provides improved stone and low-temperature impact resistance without the need for a two-coat finish or zinc primer, allowing for customized impact resistance and reduced susceptibility to corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-coat finish (zinc primer + epoxy varnish) is applied to electrically conductive components, then corrosion protection is improved, but stone impact resistance and low-temperature impact resistance deteriorate
Solution Approach 1:
The patent combines the corrosion protection function and impact resistance function into a single integrated coating layer. This single-layer coating system incorporates both protective properties, eliminating the need for separate primer and topcoat layers while achieving both corrosion protection and improved stone impact resistance, including at low temperatures.
Solution Approach 2:
The coating comprises a composite material system with multiple functional components including at least one metal powder (such as zinc, aluminum, or their alloys), at least one organic binder, and optionally corrosion inhibitors and impact modifiers. This composite structure provides both corrosion protection through the metal powder and impact resistance through the flexible binder matrix.
2Reliability
If a two-coat finish is applied to electrically conductive components, then corrosion protection is improved, but the complexity of the coating process increases
Solution Approach 1:
The patent merges the functions of multiple coating layers into a single coating application process. The single-layer coating system eliminates the need for separate primer and topcoat applications, reducing process complexity while maintaining comprehensive corrosion protection through the integrated functional components within the single layer.
3Reliability
If conventional coatings are applied to electrically conductive components, then basic protection is provided, but energy absorption capacity deteriorates
Solution Approach 1:
The coating uses a composite material system with impact modifiers and flexible binders that enable energy absorption through viscoelastic deformation. The combination of metal powders, organic binders, and impact modifiers creates a coating that can absorb impact energy while maintaining corrosion protection, significantly improving energy absorption capacity compared to conventional rigid coatings.
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 solution achieves enhanced stone and low-temperature impact resistance, reduced material usage, and simplified coating application, with the coated components demonstrating improved penetrative impact strength and corrosion resistance, even at extreme temperatures.
Implementation Method 1
the intention with this improved electrically conductive component and more particularly its coating is to provide a capacity for energy absorption, particularly on the part of the coating, that is improved by comparison with conventional electrically conductive components
Implementation Method 2
The intention, furthermore, is to at least reduce the susceptibility to physical damage, more particularly susceptibility to corrosion, after (stone) impact exposure
Implementation Method 3
a method for coating an electrically conductive component, with the steps of: providing an electrically conductive component having a surface; providing a powder composition; pretreating the surface of the electrically conductive component; drying the surface of the electrically conductive component; powder-coating the surface of the electrically conductive component with the powder composition
Data Source
AI summary
An electrically conductive component, which can be used in motor vehicles, may include a surface having a layered covering. The layered covering may be a melted and cured product of coating with a powder composition. Further, the layered covering may have a layer thickness of greater than 150 μm, and the layered covering may be a single-layer covering. The layered covering may also include a pore-like layer structure. The pore-like layer structure of the layered covering may be responsible for an at-least-15% reduction in density of the layered covering relative to a density of the layered covering without the pore-like layer structure.