Corrosion protection for steel in marine environment is best achieved by:
Choose the correct answer
Only painting with regular household paint
Cathodic protection + high-performance coating system (epoxy + PU) per IS 12944 C5-M — multiple barriers
Sandblasting surface regularly
Steel does not corrode in marine environment
Correct Answer
B. Cathodic protection + high-performance coating system (epoxy + PU) per IS 12944 C5-M — multiple barriers
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Marine environment (high chloride, humidity): protection hierarchy: (1) Cathodic protection (sacrificial Zn/Al anodes or impressed current) — most effective for submerged; (2) High-build epoxy + polyurethane paint system (IS 12944 category C5-M); (3) Stainless steel or COR-TEN weathering steel; (4) Hot-dip galvanising (zinc coating). Multiple systems often combined.
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