The corrosion cost of marine engineering equipment accounts for 3.4% of global GDP, and white carbon black is reshaping the anti-corrosion field with nanotechnology. The superhydrophobic white carbon black coating developed by XX company constructs a "lotus leaf effect" micro nano structure on the surface of particles, which enables the water droplet contact angle to reach 165 ° and releases corrosion inhibiting zinc ions. The actual sea hanging test shows that the coating has a protection life of 15 years in the high salt environment of the South China Sea, which is three times longer than traditional epoxy coatings. What's even more surprising is that the coating has self-cleaning function, which can automatically remove the attachment of marine organisms and reduce ship navigation resistance by 8%. At present, China Shipbuilding Industry Corporation has applied it to the ballast tanks of LNG transport ships, saving maintenance costs of over 2 million yuan per ship per year.