Japan has developed a new steel plate that can suppress the deterioration of ship coating film

Japan JFE Steel has developed a new high corrosion-resistant thick steel plate "JFE-SIP-BT" that can suppress the deterioration of the coating film of ships' ballast tanks. This steel sheet finds an element which can suppress the deterioration of the coating film, improves the steel protective property based on the corrosion product, and can slow down the deterioration rate to about half of the original steel. The development of steel sheets that prolong the life of coating films by suppressing the deterioration of coating film is the first in the world in shipbuilding.

When the ship is sailing in an empty condition, seawater is usually loaded into the ballast tank for stability. As a result, most ballast tanks are subject to multiple protective coatings, and the film is degraded over time and environment. Especially the sun exposure and the scouring of seawater droplets can cause the corrosion rate of steel to reach 0.5mm/year. Ship repairs require a lot of money.

The International Maritime Organization (IMO) has set the coating life to 15 years, but with this new high corrosion-resistant thick steel plate, the single coating life can be extended to 25 years, greatly reducing the life cycle cost of the hull and improving the hull. Safety and reduce CO2 emissions. The ease of use in welding and processing is the same as that of the original steel.

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