ABYC Marine Electrical vs ABYC Marine Corrosion: which ABYC certification fits your work?
Marine Corrosion builds on Marine Electrical, and ABYC strongly recommends passing Electrical first. Electrical covers how systems are wired and protected; Corrosion covers what electrical current does to underwater metals: the galvanic series, stray current, cathodic protection and surveys. Corrosion has fewer questions (189 against 204) in the same 3.5 hours.
ABYC Marine Electrical vs ABYC Marine Corrosion at a glance
| ABYC Marine Electrical | ABYC Marine Corrosion | |
|---|---|---|
| Full name | ABYC Marine Electrical Certification Exam | ABYC Marine Corrosion Certification Exam |
| Questions | 204 multiple-choice questions | 189 multiple-choice questions |
| Time | 3.5 hours | 3.5 hours |
| Passing score | 83.3% (ABYC's published cut score) | 83.6% (ABYC's published cut score) |
| Format | Proctored, computer-based multiple choice; reference-material rules are not stated on the public exam pages, so confirm them when you book | Proctored, computer-based multiple choice; reference-material rules are not stated on the public exam pages, so confirm them when you book |
| Cost | Exam only: US$295 for ABYC members, US$595 for nonmembers, per attempt (2026). Study guide US$85 member / US$175 nonmember. Class fees vary; check ABYC's class calendar | Exam only: US$295 for ABYC members, US$595 for nonmembers, per attempt (2026). Study guide US$85 member / US$175 nonmember. Class fees vary; check ABYC's class calendar |
| Languages | English | English |
| Where | Online with a remote proctor (webcam, microphone, Chrome, government ID, single monitor), or at the end of an ABYC certification class | Online with a remote proctor (webcam, microphone, Chrome, government ID, single monitor), or at the end of an ABYC certification class |
| Level | ABYC Certification | ABYC Certification |
What each exam covers
ABYC Marine Electrical
- Electrical Theory and Meters
- DC Systems, Wiring and Overcurrent Protection
- Batteries, Chargers and Inverters
- AC Shore Power and Safety Devices
- Generators and Power Source Selection
- Lightning Protection and CO Detection
- Troubleshooting AC and DC Systems
ABYC Marine Corrosion
- Corrosion Chemistry and Electrical Theory
- The Galvanic Series and Galvanic Corrosion
- Stray Current and Shore Power
- Cathodic Protection and Anodes
- Metals, Aluminum Boats and Coatings
- Corrosion Surveys
Which should you take?
Marine Corrosion builds on Marine Electrical, and ABYC strongly recommends passing Electrical first. Electrical covers how systems are wired and protected; Corrosion covers what electrical current does to underwater metals: the galvanic series, stray current, cathodic protection and surveys. Corrosion has fewer questions (189 against 204) in the same 3.5 hours.
Try both, free
Each free practice test takes about 10 minutes and shows your score by topic. No signup.
FAQ
What is the difference between ABYC Marine Electrical and ABYC Marine Corrosion?
Marine Corrosion builds on Marine Electrical, and ABYC strongly recommends passing Electrical first. Electrical covers how systems are wired and protected; Corrosion covers what electrical current does to underwater metals: the galvanic series, stray current, cathodic protection and surveys. Corrosion has fewer questions (189 against 204) in the same 3.5 hours.
Which is harder, ABYC Marine Electrical or ABYC Marine Corrosion?
ABYC Marine Electrical: 204 multiple-choice questions in 3.5 hours. ABYC Marine Corrosion: 189 multiple-choice questions in 3.5 hours. The longer exam covers more ground, but the harder one is the one further from your daily work. Take both free practice tests to see where you stand.
Can I hold both ABYC Marine Electrical and ABYC Marine Corrosion?
Yes. Each ABYC certification is separate, and many technicians hold several. Three or more qualify you for Master Technician or Master Advisor status (Service Management and USCG Recreational Boat Regulations don't count toward it).
How do I prepare for ABYC Marine Electrical and ABYC Marine Corrosion?
Start with the free practice test for each, then study by topic. Premium is per exam ($147 a month each), so most people start with the exam they'll sit first and add the second when they're ready.
More comparisons
- ABYC Marine Electrical vs ABYC Marine Systems
- ABYC Marine Electrical vs ABYC Engines & Fuel Systems
- ABYC Marine Electrical vs ABYC Advanced Electrical
Exam details are summarized from ABYC's published information as of November 2026. Confirm with ABYC before you book. ABYCExamPrep is not affiliated with the American Boat & Yacht Council.