 ##  [Contact Welding](/contact-welding) 

  ##  [Contact Welding](https://engineering.quantumdictionary.io/contact-welding-0) 

  
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**Engineering &amp; Applied Technologies Dictionary**

 
Definition

Permanent or semi-permanent metallurgical adhesion between two electrical switch or breaker contact surfaces produced by local melting, arcing, or thermally driven diffusion, such that the contacts cannot separate or restore the intended open circuit under normal operating force.