Advanced Aluminum Alloy Oil Pipelines for Polar Regions: Material Innovation and Production Strategies

Oil transportation in polar and subpolar regions poses significant challenges due to extremely low temperatures and corrosive environments. This paper addresses these challenges by exploring the design and development of aluminum alloy pipelines, focusing on Al7075 as a lightweight and corrosion-resistant alternative to traditional carbon and alloy steels. The study investigates a modified aluminum binary alloy formula aimed at enhancing low-temperature toughness and resistance to corrosion. Advanced manufacturing techniques such as rapid solidification and hot forming with an in-die quenching process are applied to refine the alloy’s microstructure and improve its mechanical properties. A novel concrete-filled double-skin aluminum alloy tubular design is introduced, providing additional strength and flexibility to withstand high pressures and shear forces. Furthermore, a Co-Ti-Mo conversion coating is utilized to enhance the corrosion resistance of the pipelines, showing up to five times greater protection against pitting. This research offers a comprehensive solution for improving the durability and efficiency of aluminum alloy pipelines in harsh polar environments, paving the way for safer offshore oil transportation.