Metal Nobility

Understanding Electrolysis

 
     
 
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Is it really Electrolysis?

We can measure it. We know it exists. We can see it's effects. We call it electrolysis. Yet, it has another name. Perhaps a more proper name; Galvanic Corrosion. Science has known about galvanic corrosion for years. Technically and properly, the term electrolysis is perhaps better used when describing a controlled electro-chemical process, such as in plating or manufacturing. The term galvanic corrosion is perhaps more accurately used when describing the destructive effects of metals when exposed to an electrolyte. Ocean water is a rather good electrolyte, and big boats are made from metal. It's not surprising that the US Navy knows a lot about galvanic corrosion.

All metals are not created equally.

 

 

The Galvanic Series.

 

Active-Anodic Magnesium
Most at risk- easy to corrode, Zinc
 most attractive for electrolysis Aluminum
  Cadmium
  Steel/Iron
  Cast Iron
  Lead
ñ Nickel
ò Brass
  Copper
  Bronze
  Stainless Steel
  Silver
Noble-Cathodic Gold
Metals Least at risk of electrolysis Graphite

*Note: this is the short list of metals common in automotive applications.

 

 

More Galvanic Series Data from Military Missile testing

 

 

 

 

 

 

 

 

 
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