Galvanic Corrosion

Galvanic corrosion occurs when two dissimilar metals are touching while in contact with an electrolyte.

In specific regards to piercing, this means that when two different metals (such as stainless steel and titanium) are touching inside of the mouth (or any moist area, including genitals), a chemical reaction occurs that starts to corrode one or both metals. In terms of risks, galvanic corrosion in an oral piercing can lead to a sore throat, tongue and/or gums, which may last until the offending jewelry is removed.

Preventing galvanic corrosion is as simple as not mixing metals in body jewelry that spends any amount of time in contact with body fluids such as saliva or urine, or genital mucosa.