In Situ Rubberized Cable Corrosion Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metal cables used in tire reinforcement are prone to fatigue, fretting, and corrosion, leading to reduced lifespan due to insufficient rubber penetration and the use of expensive or environmentally harmful corrosion inhibitors.
Innovation Solution
A single-strand or multi-strand cable gummed in situ with a rubber composition containing a compound of formula (I), where X and Y represent alkaline or alkaline earth cations, which acts as an effective and environmentally neutral corrosion inhibitor, reducing corrosion risk and improving adhesion between metal wires and rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal cables are used in tire reinforcement, then the cable structure provides necessary mechanical strength, but the cables are prone to corrosion and fatigue leading to reduced lifespan
Solution Approach 1:
A rubber composition is introduced as an intermediary substance between the metal cables and the corrosive environment. This rubber composition penetrates into the spaces between wires and strands, forming a protective barrier that prevents corrosive agents (water, oxygen) from reaching the metal surfaces, thereby eliminating corrosion while maintaining the mechanical strength of the cable structure
Solution Approach 2:
The rubber composition creates an inert protective environment around the metal cables by filling all interstices and capillaries between wires and strands. This rubber-filled environment excludes moisture and oxygen, effectively creating a corrosion-free zone that protects the metal cables from degradation throughout the tire's service life
2Reliability
If corrosion inhibitors are added to protect metal cables, then corrosion resistance is improved, but expensive or environmentally harmful chemicals are used
Solution Approach 1:
The patent uses conventional rubber composition materials that are already present in tire manufacturing, replacing expensive or environmentally harmful corrosion inhibitors. The rubber itself serves as the protective agent, eliminating the need for additional chemical additives while providing effective corrosion protection through physical barrier formation
Solution Approach 2:
The rubber composition performs multiple functions simultaneously: it provides structural reinforcement, maintains tire integrity, and protects metal cables from corrosion. The same rubber material that forms the tire's structural matrix also serves as the corrosion protective barrier, eliminating the need for separate corrosion inhibitor chemicals
3Reliability
If rubber composition is applied to impregnate cable spaces, then penetration into interstices improves corrosion protection, but insufficient penetration leaves empty channels for corrosive agents
Solution Approach 1:
The rubber composition is applied to the cable structure before final tire assembly, allowing adequate time and conditions for complete penetration into all interstices, capillaries, and spaces between wires and strands. This preliminary impregnation ensures that no empty channels remain before the tire is put into service, creating immediate corrosion protection from the outset
4Strength
If multi-layer cable structures are used to improve fatigue resistance, then mechanical strength is enhanced, but more complex structures create more interfaces for water penetration and corrosion
Solution Approach 1:
The rubber composition merges all the spaces and interfaces between multiple cable layers into a single continuous protective matrix. By penetrating into and filling all interstices between wires, strands, and layers, the rubber eliminates the interface problem entirely, creating a unified corrosion-free environment that protects all metal surfaces regardless of the cable's structural complexity
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 described cable configuration significantly reduces corrosion and fatigue, enhances mechanical properties, and extends the lifespan of tire reinforcements while minimizing environmental impact through the use of a neutral corrosion inhibitor.
Implementation Method 1
the use of a corrosion inhibitor makes it possible, on the one hand, to prevent the action of corrosive agents through the formation of a protective film around the metallic reinforcing element
Implementation Method 2
on the other hand, by adsorption on the metallic reinforcing element, to slow down or even stop the corrosive action of the corrosive agents on and within the metallic reinforcing element
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a cable (C) rubberized in situ, comprising: a layer (CT1) inside the cable; a layer (CT3) outside the cable, and a rubber composition (20) disposed between the inner and outer layers of the cable. The rubber composition (20) comprises a compound of formula (I), in which X and Y, independently of each other, represent an alkali or alkaline-earth cation.