Mitsui OSK Lines says that it and JFE Steel Corporation (JFE) have developed an advanced new corrosion-resistant steel plate. They have given it the name JFE-Steel for Ship Inside Protection - for Oil Tankers (JFE-SIPTM-OT).
MOL says: “A five-year research project has proven that the new material limits deterioration of crude oil cargo tanks. The company will fully adopt this new corrosion-resistant steel plate on bottom and upper plates of the cargo oil tanks of an MOL operated very large crude carrier (VLCC) to be launched in November 2008. The adoption of this material on upper deck plate is the world's first.”
The new corrosion-resistant steel plate is said to reduce corrosion by slowing down pitting to between a half and one fifth of the level seen with conventional materials.
The company says: “In current vessels, the bottom plate of the cargo oil tank is covered with an corrosion-resistant membrane, but pitting occurs when the membrane gets chipped. It corrodes up to about 4mm annually. If no action is taken, this poses a risk to safety. General corrosion will occur at the rear of the upper plate in the cargo oil tank due to the effects of hydrogen sulphide. As corrosion spreads, it may reduce the strength of the hull structure, too.”
MOL and JEF say they conducted research and determined the corrosion process on existing vessels to increase the safety of the hull and enhance the safety of navigation. This led to the development of the new corrosion-resistant steel. MOL says it believes adopting this new corrosion-resistant material, which does not require painting, offers economic and safety benefits for tankers. “In addition,” MOL claims, “it helps to reduce CO2, emissions. MOL expects this technology to become mainstream in environment-friendly tankers that will provide safer, more efficient, more reliable service. MOL and JEF plan to promote the effectiveness of this innovative material on a global scale.”
MOL says: “A five-year research project has proven that the new material limits deterioration of crude oil cargo tanks. The company will fully adopt this new corrosion-resistant steel plate on bottom and upper plates of the cargo oil tanks of an MOL operated very large crude carrier (VLCC) to be launched in November 2008. The adoption of this material on upper deck plate is the world's first.”
The new corrosion-resistant steel plate is said to reduce corrosion by slowing down pitting to between a half and one fifth of the level seen with conventional materials.
The company says: “In current vessels, the bottom plate of the cargo oil tank is covered with an corrosion-resistant membrane, but pitting occurs when the membrane gets chipped. It corrodes up to about 4mm annually. If no action is taken, this poses a risk to safety. General corrosion will occur at the rear of the upper plate in the cargo oil tank due to the effects of hydrogen sulphide. As corrosion spreads, it may reduce the strength of the hull structure, too.”
MOL and JEF say they conducted research and determined the corrosion process on existing vessels to increase the safety of the hull and enhance the safety of navigation. This led to the development of the new corrosion-resistant steel. MOL says it believes adopting this new corrosion-resistant material, which does not require painting, offers economic and safety benefits for tankers. “In addition,” MOL claims, “it helps to reduce CO2, emissions. MOL expects this technology to become mainstream in environment-friendly tankers that will provide safer, more efficient, more reliable service. MOL and JEF plan to promote the effectiveness of this innovative material on a global scale.”