The anti-corrosion and rust prevention of marine steel plates is of crucial importance. Here are some more detailed information:

 

I. Importance of anti-corrosion and rust prevention

 

Marine steel plates are exposed to the marine environment for a long time and face severe corrosion challenges. Seawater is a strong electrolyte solution containing a large amount of salt, dissolved oxygen, and various microorganisms. These factors can accelerate the corrosion of steel plates. Corrosion not only reduces the strength and service life of steel plates but may also lead to damage to the ship's structure and endanger the safe navigation of the ship. Therefore, taking effective anti-corrosion and rust prevention measures is essential for prolonging the service life of ships, reducing maintenance costs, and ensuring navigation safety.

 

 

 

 

Shipbuilding Steel Plate Specification
Standard	CCS,ABS,GL,BV,DNV,NK,LR,KR,RINA
Grade	A/B/D/E,A32/D32/E32/F32,A36/D36/E36/F36,A40/D40/E40/F40,A131A/B/D/E/AH32 /DH32/EH32/AH36/DH36/EH36/AH40/DH40/EH40,NVA420/D420/E420,NVA460 /D460/E460,NVA500/D500/E500,NVA550/D550/E550….
Thickness	2-300mm (2-100mm usually used)
Width	1000-3000mm (1000-2200mm usually used)
Length	1000-12000mm or as your request

II. Coating protection

 

Types and selection of anti-corrosion paints

Epoxy paint: It has good water resistance, chemical corrosion resistance, and adhesion, and is suitable for areas such as the ship's bottom and below the waterline that are in long-term contact with seawater.

Polyurethane paint: It has high hardness, good wear resistance, and high gloss, and is suitable for areas such as the ship's superstructure and deck.

Chlorinated rubber paint: It dries quickly, has good water resistance, and is convenient for construction. It is often used for temporary protection and maintenance of ships.

When choosing anti-corrosion paint, factors such as the ship's operating environment, operating conditions, and maintenance cycle should be considered to select anti-corrosion paint with appropriate performance.

Coating construction process

Surface treatment: Before painting, the steel plate surface must be thoroughly cleaned and treated to remove impurities such as oil stains, rust, and oxide scale to ensure the adhesion of the coating. Commonly used surface treatment methods include sandblasting, shot blasting, and pickling.

Primer coating: Primer is the foundation of the coating system and mainly plays the role of rust prevention and enhancing adhesion. The selection of primer should be determined according to the steel plate material and use environment. Generally, epoxy primer or zinc-rich primer is used.

Intermediate coat painting: The intermediate coat mainly plays the role of increasing the coating thickness, improving the anti-corrosion performance, and shielding. The selection of the intermediate coat should match the primer and topcoat. Generally, epoxy micaceous iron intermediate coat or polyurethane intermediate coat is used.

Topcoat painting: The topcoat is the appearance layer of the coating system and mainly plays the role of decoration and protection. The selection of the topcoat should be determined according to the ship's appearance requirements and use environment. Generally, polyurethane topcoat or fluorocarbon topcoat is used.

Coating maintenance and repair

Regular inspection: Regularly inspect the coating and promptly repair problems such as damage, blistering, and peeling. The inspection frequency should be determined according to the ship's use environment and maintenance requirements, generally once a year or once every two years.

Local repair: For locally damaged coatings, sandpaper can be used to polish and clean the surface, and then primer, intermediate coat, and topcoat can be reapplied. During repair, attention should be paid to the overlap and transition with the surrounding coating to ensure the integrity of the coating.

Comprehensive recoating: When the coating is severely aged, worn, or has large areas of damage, comprehensive recoating is required. Before comprehensive recoating, the steel plate surface should be thoroughly cleaned and treated, and then recoating should be carried out according to the coating construction process.

 

 

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our Hot Rolled BV Lr CCS ABS Grade A/B Maine Shipbuilding Steel Plate, and develop new technical specifications and processes.
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We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
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All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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