Cathodic Protection (CP) is a vital corrosion-prevention system used on semi-submersible offshore platforms (semi-subs), ensuring the long-term safety, integrity, and compliance of critical underwater structures.
Operating in harsh, oxygen-rich marine environments, semi-subs face constant corrosion threats due to prolonged exposure to saltwater. Cathodic protection is a proven, effective method to mitigate this risk.
Extensive Submerged Surfaces
Semi-submersible platforms feature large submerged components—including hulls, columns, pontoons, and risers—that are continuously exposed to seawater.
Accelerated Corrosion Risk
The constant presence of oxygenated saline water accelerates electrochemical reactions, making these structures highly vulnerable to rapid corrosion.
Safety & Regulatory Compliance
Corrosion undermines structural integrity, impacting the platform’s safety, performance, and certification. CP systems are essential for meeting standards set by authorities such as ABS (American Bureau of Shipping) and DNV (Det Norske Veritas).
Commercial Marine Group provides tailored CP systems designed to meet the unique demands of semi-submersible platforms:
Sacrificial Anode Systems – Passive protection using galvanic anodes (typically aluminum or zinc) attached to the steel structure.
Impressed Current Cathodic Protection (ICCP) – Active protection using external current sources and monitoring systems for precise control.
CP System Inspection & Maintenance – Routine inspection, anode replacement, and system upgrades for extended asset life.
Decades of experience in offshore corrosion prevention
Certified diving and engineering teams for underwater CP installation
Compliance with international marine safety and classification standards
Protect your platform. Preserve your investment. Partner with Commercial Marine Group for end-to-end Cathodic Protection solutions.
