 ##  [Intergranular Corrosion](/intergranular-corrosion) 

  ##  [Intergranular Corrosion](https://natural.quantumdictionary.io/intergranular-corrosion-0) 

  
 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/topic-specific-dictionaries/natural-formal-sciences)


**Natural &amp; Formal Sciences Dictionary**

 
Definition

Preferential chemical or electrochemical attack that progresses along the grain boundaries of a polycrystalline material because those boundaries differ in composition or microstructure from grain interiors.

 
 ##  [Intergranular Corrosion](https://engineering.quantumdictionary.io/intergranular-corrosion-1) 

  
 [![Engineering & Applied Technologies Dictionary](/sites/default/files/styles/large/public/2026-01/Engineering%20%26%20Applied%20Technologies.png.webp?itok=_IKO7_-n)](/topic-specific-dictionaries/engineering-applied-technologies)


**Engineering &amp; Applied Technologies Dictionary**

 
Definition

A form of corrosion that preferentially attacks and advances along the grain boundaries of a polycrystalline metal or alloy, often because boundary regions have a different local chemistry or electrochemical potential than grain interiors, producing structural weakening without uniformly deep surface loss.