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Galvanic Corrosion Table

 
 

   
 
                                                                                    
                                                                                

What is a Galvanic Corrosion Table?

A Galvanic Corrosion table is a table that contains the  galvanic series or electrochemical series ranks of  metals according to their potential, generally measured with respect to the Standard Calomel Electrode (S.C.E.).

This Galvanic Corrosion Table says that the "anodic" or "less noble" metals at the negative end of the series such as magnesium, zinc and aluminum - are more likely to be attacked than those at the "cathodic" or "noble" end of the series such as gold and graphite.

Galvanic Corrosion, Galvanic Series of Metals in Seawater


The critical point is the difference in potential of the two materials being considered as a joined pair.

A difference of hundreds of millivolts is likely to result in galvanic corrosion, but only a few tens of millivolts is unlikely to be a problem. 

Galvanic corrosion is a localized mechanism by which metals can be preferentially corroded.

This form of corrosion has the potential to attack junctions of metals, or regions where one construction metal is changed to another.

Frequently this condition arises because different metals are more easily fabricated into certain forms; an example might be a door frame manufactured from aluminum extrusions (aluminum extrudes extremely well into architectural sections), but with a door handle fabricated from stainless steel tube to exploit its higher strength and abrasion resistance.   

We suggest you to have a look also at these pages:

Galvanic Corrosion Documents

Seawater Corrosion Rates of Metals

Galvanic Corrosion

Galvanic Series of Metal in Seawater

Galvanic Table

                                 

 
   
   
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