Save Yourself - Sacrificial Anodes

STEM Learning Module
New and old anodes side by side
Ocean Exploration Trust

Students will investigate how rates of chemical reaction rates - galvanic corrosion - vary among different metal types with and without the addition of sacrificial metal. This is a redox reaction example suited well for upper-level students. Students will learn how anodes protect E/V Nautilus and the ROVs Hercules and Argus from corrosion.

Objectives & learning outcomes

Following this activity, students will:

  • understand and explain the concept of corrosion, its causes, and discuss methods used to prevent corrosion.
  • understand what sacrificial anodes are and how they function.
  • understand and explain why sacrificial anodes are vital to the operation of Exploration Vessel Nautilus and its ROVs Hercules and Argus.

Disciplinary Core Ideas

Disciplinary Core Ideas

Grade level

Grade level

Time & materials

Time & materials
Scale: two of three
Prep time involves some setup of materials & low-cost supplies.