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Views: 0 Author: Site Editor Publish Time: 2026-05-29 Origin: Site
Seawater aquaculture cages face extreme long-term corrosion conditions.
High chloride ions, humidity and marine organisms accelerate metal decay.
Traditional cage materials have obvious service life limitations.
Galvanized steel cages rust severely within 1 to 2 years.
Ordinary 304 stainless steel suffers pitting and crevice corrosion quickly.
Frequent replacement increases aquaculture operating costs.
316L stainless steel with molybdenum additive is widely used for marine facilities.
Five-year continuous field tracking verifies its reliable long-term performance.
316L contains 2% to 3% molybdenum elements.
Greatly improves resistance to chloride ion erosion.
Its pitting resistance is 3 to 5 times higher than 304 stainless steel.
Low carbon content prevents intergranular corrosion after welding.
Stabilizes internal structure in long-term seawater immersion.
Forms dense and self-repairing oxide film on the surface.
Effectively isolates seawater and slows down corrosion progression.
Coastal seawater area with standard 3.2% to 3.5% salinity.
Exposed to alternating wind, waves and tidal immersion all year round.
No manual anti-corrosion maintenance during the tracking period.
Annual visual observation and surface condition recording.
Biennial corrosion rate detection and structural inspection.
Full performance verification after five years of service.
Set 304 stainless steel and galvanized steel cages as controls.
Record and compare aging differences under identical conditions.
316L cage surfaces remain smooth and intact after five years.
No obvious rust spots, pitting holes or penetrating corrosion.
Only slight marine biofouling on partial mesh surfaces.
Long-term average corrosion rate stays below 0.01 mm per year.
Far lower than ordinary stainless steel and industry standard limits.
Corrosion trend gradually stabilizes after passivation film matures.
Weld joints show no intergranular corrosion or crack defects.
Structural strength and tightness fully meet aquaculture standards.
304 cages show scattered pitting after 3 years of immersion.
Galvanized steel cages suffer severe rust and mesh breakage within 2 years.
316L presents far better long-term environmental adaptability.
High-concentration chloride ions easily break weak passivation layers.
316L’s molybdenum component effectively resists this damage.
Algae and shellfish attachments cause local crevice corrosion.
Regular simple cleaning can eliminate hidden dangers.
Hot and cold alternation causes slight thermal stress.
316L structure remains stable without accelerated aging.
Extend cage service life to more than 10 years in coastal areas.
Reduce frequent replacement and downtime losses.
Lower long-term maintenance and labor costs for fish farms.
Stable mesh structure protects fish school safety.
Avoid breeding loss caused by corrosion and mesh breakage.
Regularly clean surface biofouling with soft tools.
Check weld joints and stress concentration points periodically.
Avoid hard scratching to protect the surface passivation film.
Timely remove accumulated sediment in tidal zones.
Five-year continuous field tracking fully proves 316L’s superior seawater corrosion resistance.
Its low corrosion rate and stable structural performance solve the short-life pain point of traditional cage materials.
With reliable anti-pitting and anti-aging capabilities, it adapts to long-term marine aquaculture scenarios.
Though the initial procurement cost is higher, 316L cages deliver outstanding long-term cost performance.
For modern large-scale and standardized seawater breeding, 316L stainless steel has become the most ideal cage material.
