Seawater corrosion is a major headache for farmers in offshore and deep-sea aquaculture: traditional netting ages and breaks down after just 1–2 years of immersion. Replacing it not only incurs heavy costs, but also disturbs fish schools and disrupts production schedules. However, Qingdao Haosail’s high-quality alloy netting solves this problem once and for all with its cutting-edge technology of superior seawater corrosion resistance.
72-hour Salt Spray Test: Zero Corrosion!
The core of seawater corrosion lies in high-salinity electrochemical erosion, which ordinary netting can hardly withstand. Qingdao Haosail’s high-quality alloy netting boasts top-tier corrosion resistance, thanks to its specialized material formula and precision manufacturing process.
In the authoritative 72-hour neutral salt spray test — a test whose corrosive intensity is equivalent to one year of natural seawater erosion — the netting surface remains smooth, clean, free from rust and damage, and structurally stable, easily withstanding long-term seawater corrosion.
Experimental Conclusion of East China Sea Fisheries Research Institute
Haosail High-Quality Alloy Netting demonstrates excellent corrosion resistance in neutral salt spray environments, with its corrosion rate decreasing rapidly as the corrosion time elapses.
The reason for the excellent corrosion resistance of Haosail High-Quality Alloy Netting in neutral salt spray lies in the formation of a dense cuprous oxide (Cu₂O) film on the alloy surface after corrosion. As corrosion progresses, the Cu₂O film thickens, and the outer layer of the Cu₂O film is further oxidized to form loose and porous copper hydroxycarbonate [Cu₃(OH)₃(CO₃)₂] particles, while the inner layer remains dense at all times.
Selective phase corrosion occurs on Haosail High-Quality Alloy Netting after corrosion in neutral salt spray. Specifically, the copper (Cu) solid solution is corroded, while the second phase in the alloy remains at the grain boundaries.
Globally Proven: 5 Years Underwater Service, Still Going Strong!
Robust Laboratory Data Backs It Up, But Real-World Aquaculture Performance Truly Proves Its MettleThe product has been fully validated in long-term aquaculture projects across multiple global sea areas:
Deep-water Aquaculture Project in Hawaii, USA: Since the netting was commissioned in 2020, it has withstood 5 years of wind and wave erosion and high-salinity seawater immersion. To date, it remains free from corrosion and damage, retaining its excellent protective performance.
Weitou Circular Cage Project in Quanzhou, Fujian: Deployed in March 2023, the netting has achieved zero corrosion and zero maintenance over nearly 3 years. It stays durable and intact, ensuring the continuity and stability of aquaculture operations.
From coastal shallows to 2,000-meter-deep oceans, and from tropical to temperate fishing grounds, its over 5-year service life is no empty boast — it is a solid guarantee for aquaculture operations.
One-Time Investment, Save Big for 5 Whole Years!
For large-scale aquaculture operations, netting corrosion is an invisible profit drain: a 60-meter circular cage fitted with conventional netting needs replacement every 1–2 years, with total replacement costs exceeding RMB 100,000 over 5 years.
Choose Haosail Supper Clear Alloy Netting, and a single installation will last 5+ years. This alone cuts net replacement costs by RMB 80,000 per cage. What’s more, it eliminates fish disturbance and production downtime caused by net replacement, slashing overall operational costs by a whopping 40%.
The Beihai, Guangxi project has seen zero maintenance and zero net replacements in nearly two years of operation. Fish stocks thrive with stable growth and low mortality rates, truly delivering on the promise of one-time investment, long-term returns.
As a national high-tech enterprise, Qingdao Haosail Machinery leverages world-leading netting material technology to deliver efficient, cost-effective and sustainable solutions for deep-sea aquaculture.
If you are plagued by netting corrosion issues and looking to cut costs while stabilizing production, Haosail Supper Clear Alloy Netting is undoubtedly your ideal choice!