What Are The Development Trends of Fishing Boat Hull Materials

 From the perspective of material recyclability, steel, aluminum alloy, and polyethylene are selected to build fishing boats. The common grades of marine aluminum plated are 5083, 5052, 5086, 6061, 6082 aluminum sheet. The hull materials that have reached the end of life can be recycled, reprocessed, and reused, which meets the requirements for effective use of natural resources.

However, steel has poor resistance to environmental corrosion and has a rough surface, which is easily adhered to by aquatic organisms. A large amount of steel is lost due to corrosion every year. Therefore, the surface of steel used in ship construction must be sprayed with paint, and paint can cause water pollution and poison aquatic organisms.

Although fiberglass fishing boats have very obvious advantages over traditional wooden fishing boats in many aspects, their scrapped hull materials cannot be recycled and pollute the environment. It can be seen that aluminum alloy and polyethylene are sustainable fishing boat construction materials.

Development Trend of Fishing Boat Hull Materials

Energy-saving materials

As people's awareness of the energy crisis and environmental protection increases, the requirements for energy conservation and emission reduction of fishing boats are getting higher and higher. At present, fiberglass composite materials, high-density polyethylene materials, and aluminum alloy materials are the primary choices for building fishing boats.

High strength material

As the offshore fishery resources in various countries around the world become increasingly tight, the competition to obtain distant-water fishery resources becomes more and more fierce. Distant-water fishing boats are gradually developing towards large-scale and multi-functional. Fishing boats operating in the open sea for a long time need to cope with various harsh meteorological environments, which has a negative impact on the hull strength of fishing boats. There are very high requirements for the strength of fishing boat hulls.

Corrosion-resistant materials

Ships have been in the marine environment for a long time, and the problem of hull corrosion has always been the focus of people's attention. Reasonable anti-corrosion design is a key factor in controlling ship corrosion. The selection of construction materials, the design of ship structure and the ship construction process all have certain effect on the corrosion resistance of the hulls.

Low cost material

At present, the hull construction cost accounts for more than half of the total cost, which mainly includes material procurement fees and labor fees. The difficulty of material processing determines the construction cycle, which in turn affects labor costs. Therefore, materials that are cheap and easy to process and form, such as composite masking materials are much favored.

Haomei Aluminum has rich grades of marine aluminum alloys including 5052, 5083, 5086h32 aluminum. Welcome to leave message below to inquire what you need.

Original Source:https://www.marinealu.com/a/what-are-the-development-trends-of-fishing-boat-hull-materials.html

5086 Rust-proof Aluminum

 Ships have special requirements for the strength, corrosion resistance and weldability of aluminum alloys, so when choosing marine aluminum sheet, Al-Mg alloy, Al-Mg-Si or Al-Zn-Mg alloy is often used.

The strength of Al-Zn-Mg and Al-Mg-Si decreases significantly after welding. Among them, the corrosion resistance of aluminum-zinc-magnesium alloys after welding is relatively poor, therefore they are subject to certain restrictions as a welding material. But Al-Mg aluminum alloy don’t have such shortcomings.

5086 Aluminum belongs to 5xxx Al-Mg alloy. Its Mg content is generally does not exceed 7%. With the increase of the magnesium content, the alloy strength will increase, while the plasticity will decrease. 5086 aluminum plate is usually used in annealed, cold work hardened or semi-cold work hardened state.

Due to the effect of magnesium, the density of 5086 aluminum sheet is larger than other aluminum plates, and it has very good corrosion resistance. It is also a well known rust-proof aluminum sheet.

According to the content of magnesium, the anti-rust aluminum plate can be divided into three categories: low magnesium content, medium magnesium content and high magnesium content. The aluminum sheet with low magnesium content is non-heat treatment strengthening. It also has relatively low strength, good weldability and good welding performance.

The aluminum plate with medium magnesium content is generally used for pipes and containers with high plasticity and medium corrosion resistance, while the anti-rust aluminum plate with high magnesium content is generally used for ordinary welded pipes, liquid containers and other parts.

5086 aluminum plate is of low magnesium content. Its application field has relatively high requirements for product performance. Therefore, its processing fee is higher than other 5xxx aluminum. Its tensile strength σb (MPa): ≥240, conditional yield strength σ0.2 (MPa): ≥95.

From 1966 to 1971, the United States built the first batch of 14 "Acivil"-class high-speed gunboats. The main deck and bottom of the ship were made of 12.7mm thick 5086-H32 aluminum alloy. The entire boat shared 71 tons of aluminum and all were welded by argon arc welding. It perfectly prevent rivets from loosening, water seepage and contact corrosion.

Original Source:https://www.marinealu.com/a/5086-rust-proof-aluminum.html