Sacrificial Anode for Corrosion Protection in EMS Electrodes
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Solution Overview
Problem
EMS electrodes integrated into clothing often fail due to corrosion, leading to incomplete muscle stimulation during training, as the circuit's resistance changes over time, causing oxidation and corrosion at connection points, which can render electrodes non-functional.
Innovation Solution
Incorporating a sacrificial anode made of materials like magnesium or magnesium alloys with a negative standard electrode potential into the EMS circuit, specifically connecting it to each electrode or line branch, to corrode instead of the electrode connections, thereby extending the equipment's durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If EMS electrodes are integrated into textile clothing for flexibility and comfort, then wearing comfort and flexibility are improved, but the electrodes become susceptible to corrosion from sweat and body fluids, reducing reliability
Solution Approach 1:
A sacrificial anode is introduced as an intermediary component between the EMS electrodes and the corrosive environment (sweat, body fluids). The anode preferentially corrodes through galvanic action, protecting the EMS electrodes and metal threads from corrosion while allowing the textile garment to maintain its flexibility and wearing comfort
Solution Approach 2:
The sacrificial anode is designed as a consumable component with limited lifespan that intentionally corrodes to protect more valuable components (EMS electrodes, metal threads, clothing). The anode is replaced periodically according to a maintenance schedule, allowing the main system to remain functional without requiring replacement of the entire garment or electrodes
2Reliability
If metal threads are used in textile structures for electrical conductivity, then electrical conductivity is improved, but the metal threads are prone to oxidation and corrosion, reducing durability
Solution Approach 1:
The sacrificial anode serves as a protective intermediary that galvanically protects the metal threads (silver, copper, or other conductive metals) from oxidation and corrosion. By being electrically connected to the metal threads and positioned in contact with corrosive body fluids, the anode preferentially corrodes, preserving the electrical conductivity and durability of the metal thread network in the textile
Solution Approach 2:
The corrosive environment (sweat, body fluids) that would normally harm the metal threads is converted into a beneficial process by the sacrificial anode. The anode utilizes the corrosive environment to perform galvanic protection, transforming the harmful corrosive action into a protective mechanism that extends the life of the conductive metal threads
3Reliability
If EMS electrodes are kept wet for optimal stimulation, then muscle stimulation effectiveness is improved, but corrosion processes are accelerated, reducing equipment lifespan
Solution Approach 1:
The sacrificial anode is positioned to be in contact with the same wet environment (sweat, body fluids) that is necessary for optimal EMS electrode function. This intermediary component absorbs the corrosive effects of the wet environment through preferential galvanic corrosion, allowing the EMS electrodes to remain wet and effective without suffering accelerated corrosion themselves
Solution Approach 2:
The sacrificial anode replicates the electrical and chemical environment experienced by the EMS electrodes, being subjected to the same body fluids and electrical potentials. This allows the anode to accurately simulate and protect against the corrosion mechanisms that would affect the electrodes, maintaining protection effectiveness while allowing continuous wet operation
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 sacrificial anode protects the EMS electrodes and connections from corrosion, ensuring consistent muscle stimulation over a longer period by sacrificing itself, thus extending the life of the EMS equipment and clothing.
Implementation Method 1
the circuit's resistance changes over time, causing oxidation and corrosion at connection points
Implementation Method 2
Incorporating a sacrificial anode made of materials like magnesium or magnesium alloys with a negative standard electrode potential into the EMS circuit, specifically connecting it to each electrode or line branch, to corrode instead of the electrode connections
Data Source
Figure 1
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AI summary
The invention relates to an EMS exercise device (10) which has at least one sacrificial anode (6), preferably a dedicated sacrificial anode for each EMS electrode (1), said sacrificial anode being connected to the EMS electrode (1) in an electrically conductive manner, in order to protect the EMS electrodes (1) and/or other elements in the electrically conductive connections from corrosion. The invention further relates to an EMS electrode (1) provided with a sacrificial anode (6), an EMS garment (2) provided with a sacrificial anode (6), an EMS signal cable (4') provided with a sacrificial anode (6'), an EMS pulse generating unit (3') provided with a sacrificial anode (6"), and an EMS undergarment provided with a sacrificial anode for an EMS exercise device and to a method for operating an EMS exercise device, for which a sacrificial anode is provided.