Hydrogen Embrittlement: The Silent Killer of Fastener
Hydrogen embrittlement (HE) of fasteners is a silent killer. It is a form of corrosion that occurs when hydrogen atoms are absorbed into the metal, causing it to become brittle and prone to cracking. This can be a serious problem when it comes to the integrity of the fasteners used in critical applications, such as aerospace, automotive, and nuclear industries. What Is Hydrogen Embrittlement?
Hydrogen embrittlement is a form of corrosion that occurs when hydrogen atoms are absorbed into the metal. This absorption can cause the metal to become brittle and prone to cracking. The process of hydrogen embrittlement is often referred to as hydrogen-induced cracking (HIC). The process of hydrogen embrittlement is caused by several factors, including the presence of hydrogen in the atmosphere, the presence of water vapor, and the presence of certain chemicals. These factors can cause the metal to absorb hydrogen, which can then cause it to become brittle and prone to cracking.
Why Is Hydrogen Embrittlement of Fasteners Dangerous?
Hydrogen embrittlement of fasteners can be dangerous because it can cause the fasteners to fail prematurely. This can be a serious problem in critical applications, such as aerospace, automotive, and nuclear industries. When fasteners fail prematurely due to hydrogen embrittlement, it can cause serious damage to the equipment or structure that the fasteners were holding together. This can lead to costly repairs, as well as potential injury or death.
How to Prevent Hydrogen Embrittlement of Fasteners
Fortunately, there are several steps that can be taken to prevent hydrogen embrittlement of fasteners. These steps include:
- Using materials that are less likely to absorb hydrogen, such as stainless steel or titanium.
- Using coatings or plating that can help prevent the absorption of hydrogen.
- Using an appropriate environmental control system to maintain the humidity and temperature of the area where the fasteners are being used.
- Using proper installation techniques, such as using the correct torque to ensure that the fasteners are properly secured.
- Regularly inspecting the fasteners for signs of hydrogen embrittlement.
Conclusion
Hydrogen embrittlement of fasteners can be a serious problem if not properly addressed. It is important to take the necessary steps to prevent hydrogen embrittlement of fasteners, such as using materials that are less likely to absorb hydrogen, using coatings or plating, and using an appropriate environmental control system. Regularly inspecting the fasteners for signs of hydrogen embrittlement is also important. By taking these steps, it is possible to prevent the silent killer of hydrogen embrittlement of fasteners.
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