The preferred material for the panel of a watertight hatch cover is corrosion-resistant stainless steel. This material can resist the salt spray and moisture corrosion of the marine environment, is not prone to rust or deformation, and can maintain structural integrity and sealing performance even after long-term use, making it suitable for the complex corrosive environment of a ship.
For areas where weight is a concern, lightweight, high-strength aluminum alloy is preferred. Aluminum alloy has a low density, which can effectively reduce the overall weight of the hatch cover and reduce the load on the hull. It also has certain corrosion resistance and pressure resistance, meeting the protection requirements of small hatches, and is easy to open and close manually.
For small hatches with higher load-bearing requirements, high-strength steel plate is preferred. Steel plate has high hardness and strong pressure resistance, able to withstand the crushing and impact during deck operations, ensuring the structural stability of the hatch cover. Furthermore, surface anti-corrosion treatment can improve its corrosion resistance in the marine environment and extend its service life.
