The VOS™ System effectively achieves simultaneous biological treatment and corrosion protection within the ship’s ballast tanks. During ballast discharge, the VOS™ System fills the ballast tanks with low-oxygen inert gas, maintaining oxygen levels below 4.0%. The ballast tank corrosion rate is thereby reduced by as much as 84%. View Corrosion Test Data Reports >>

In contrast, many chemicals used in competing BWTS solutions are strong oxidizers that can increase steel corrosion and degrade ballast tank coatings. The VOS™ System does not use chemicals and helps preserve ballast tank coatings. The low-oxygen ballast tank environment maintained by VOS™ also extends the life of sacrificial anodes, further reducing costs.

The International Association of Classification Societies (IACS) Guidelines for Coatings Maintenance and Repairs describes protocols for ballast tank surveys. The Guideline calls for surveyed ballast tanks found to be in FAIR or POOR condition to be restored to GOOD condition. As ships age, this restoration becomes increasingly expensive, running in the millions of dollars. N.E.I.’s VOS™ System is designed to maintain a GOOD rating throughout the life of the vessel without any need for coating restoration or steel renewal.

ballast tank corrosion comparisonballast tank corrosion reduced with vos

Venturi Oxygen Stripping™ reduces ballast tank maintenance to virtually $0. View Life Cycle Costs Analysis >>

N.E.I.’s ASTM-Standard laboratory testing indicates that ballast tank steel protected by VOS™ will last over 35 years before requiring renewal. Ballast tank corrosion reduction by 84% translates to:

✓   Less coating maintenance and steel renewal

✓   Significantly extended life of sacrificial anodes

✓   Shorter off-hire time in drydock significantly reduces life-cycle costs

reduced ship lifecycle costs