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An electrostatic discharge (or ESD) is a flow of electric current that occurs when two objects with different electrical potentials meet. One of the two objects will then discharge onto the other. In concrete terms, this is the famous electric shock that we have all felt when touching a metallic surface or opening a car door. This phenomenon is all the more remarkable when you brush your hair or rub a balloon on your head. While this sensation is unpleasant for a human being, it is usually not dangerous. In electronics, on the other hand, this is a serious problem, as the components are always smaller, and an electrostatic discharge can seriously damage or even destroy the component. This leads to non-quality costs, as the component is either unusable or has a hidden defect. The problem is that this phenomenon is invisible and therefore very difficult to detect. The best solution is still to protect yourself from it.
Once the risks have been identified, it is important to implement preventive measures. The international standards EN 61340 Part 5-1 and EN 61340 Part 5-2 present the general requirements and user guide for the protection of electronic devices against electrostatic processes.
The rule is simple: No charging ➔ No discharging
It is therefore necessary to:
An ESD control plan should be established in which you will define:
There are several families of INOX, each with specific characteristics:
Stainless steel 304 L is an acid-resistant 18/10 austenitic Cr-Ni alloy steel with good anti-corrosion properties due to its reduced hydrogen content. It is approved for temperatures up to 300 degrees Celsius. INOX 304 L is resistant to water, steam, atmospheric humidity and food acid, as well as to weak organic and inorganic acids, and is very versatile in its application possibilities: food industry, beverage production, pharmaceutical and cosmetic industries, apparatus construction for chemistry and medicine.
The criteria for suitability for food contact are described in the following texts:
Austenitic stainless steel therefore already has ideal characteristics for ESD (Resistivity: 73x10-8 Ωm).
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