🔍 Key Concepts

• Difference between galvanic corrosion and stray current corrosion • Role of dissimilar metals immersed in an electrolyte (like seawater) • How an electric current is created without any external power source

💭 Think About

• Which process happens naturally when two different metals (like steel and bronze) are connected and in seawater, even with no battery or wiring? • Which term specifically refers to corrosion driven by an unintended external electrical source, such as a leaking DC system on a vessel? • Look at the words in each option: which one clearly involves a natural cell formed by dissimilar metals vs. something caused by extra unwanted electrical current?

✅ Before You Answer

• Identify which option involves natural potential difference between dissimilar metals in an electrolyte • Identify which option involves external electrical systems leaking current into the water • Eliminate any options that do NOT clearly involve either dissimilar metals or electric current flow