Repassivation Potential

What Does Repassivation Potential Mean?

Repassivation potential refers to an electrochemical property of a metal that describes the degree of decreasing current from increasing current in a highly negative electrode. This quantification is used to determine the compatibility between substrate metals and metals that are used to coat the substrate with the intention of preventing corrosion.

Passivation involves applying an outer layer to a metal to protect it from harmful reactions such as corrosion. Repassivation is repeating the process after a period of time due to the protective coating wearing down.

Corrosionpedia Explains Repassivation Potential

Repassivation potential is referenced during the repetition of a previous passivation process. This process is a technique used to protect a metal substrate from corrosion by making it less chemically reactive with environmental factors such as water or air. This is done by coating the metal substrate with a protective material to make the surface resistant to corrosion. Effectively, the base metal is shielded by oxidation or a microcoating by infusing it with another metal with higher resistance properties.