As a vessel that needs to perform long-term missions in environments such as oceans, rivers and lakes, patrol boats usually require the hull to have the characteristics of high strength, corrosion resistance, light weight and easy maintenance. Aluminum alloy materials have become the main choice for patrol boat manufacturing due to their superior performance, especially in terms of seawater corrosion resistance and high strength-to-weight ratio.

In patrol boat manufacturing, 5083 and 5086 aluminum alloys are the most commonly used hull materials, especially for parts that require high strength and corrosion resistance. 5052 aluminum sheets are usually used for internal structures and minor parts, while 6061 aluminum alloys are often used for structural parts and decorative parts. 5059 aluminum alloy is designed for marine applications that require high strength and corrosion resistance. It has excellent saltwater corrosion resistance and is often used to build patrol boat hulls. Aluminum sheets of different thicknesses are flexibly selected according to the design and use environment of the patrol boat to ensure that the hull is both light and durable.

Alloy thickness selection

The thickness selection of aluminum sheets for patrol boats depends on the size, purpose and operating environment of the boat:

Small patrol boats: 3mm to 6mm thick aluminum sheets are usually used, which are suitable for lightweight design and improve maneuverability.

Medium and large patrol boats: 6mm to 12mm thick aluminum sheets can be used, especially thicker sheets are used on the bottom of the hull, keel and load-bearing parts to ensure the stability and durability of the hull when traveling at high speeds.

Specifications of marine aluminum alloys

Advantages of aluminum alloys for patrol boats:

1. Corrosion resistance: 5083 and 5086 aluminum alloys are corrosion-resistant in marine environments and reduce maintenance requirements.

2. Strength and lightness: Aluminum alloys are strong and light, which improves the speed and fuel efficiency of patrol boats.

3. Easy processing and welding: Good welding performance improves the strength and impact resistance of the hull.

4. High strength fatigue resistance: Can withstand long-term wave impact and vibration, suitable for high-intensity working environments.

5. Long service life: Can withstand harsh marine conditions and continue to operate reliably for many years.

Application areas of aluminum alloy for patrol boats:

1. Hull structure: Aluminum sheets are used as hull structural materials, such as hulls, decks, bulkheads, etc. These parts need to withstand wave impact and hull deformation, and need to have strength and corrosion resistance.

2. Superstructure: Superstructures such as the cab and crew lounge use aluminum sheets, focusing on light weight and corrosion resistance.

3. Special parts: Aluminum sheets are used to manufacture special parts such as masts and antenna brackets, which need to have wind pressure resistance and corrosion resistance to ensure safe navigation of ships.

Marine grade aluminum sheet quality requirements:

1. The surface of the aluminum sheet should be flat and free of defects, such as cracks, bubbles, inclusions, etc. Aluminum sheets with good flatness can ensure the beauty and sealing of the hull appearance.

2. The surface of the aluminum sheet is coated with anti-corrosion paint or other functional paints, and the coating should be uniform, firm, and without peeling.

3. The aluminum sheet should meet the relevant national and industry standards.