These metals include aluminum, magnesium, and zinc. The rod is screwed into the top of your water heater and protects your water heater from rusting. When the tank is filled with water the anode rod sacrifices itself to protect the exposed steel of the water heater, through a method called electrolysis.
In respect to this, what is a sacrificial anode used for?
The three most active materials used in sacrificial anodes are zinc, aluminum and magnesium. They have different properties and uses. The first property to consider is their electrical potential. All metals generate a negative voltage (as compared to a reference electrode) when immersed in water.
What is the purpose of an anode on a boat?
The way we counteract galvanic corrosion is to add a third metal into the circuit, one that is quicker than the other two to give up its electrons. This piece of metal is called a sacrificial anode, and most often it is zinc. In fact, most boaters refer to sacrificial anodes simply as zincs.
Do sacrificial anodes work on cars?
After all, this "sacrificial metal" trick works on boats and ships and bridges. Are the car companies simply not doing this, so their cars rust sooner, and we have to buy more new cars. The sacrificial metal that's usually used is zinc. As the iron turns into rust, it gives up electrons.