Hot Rolled Ship Building Carbon Mild Steel Plate

The following are some ways to extend the service life of shipbuilding steel plates from the aspect of maintenance:

Enhance anti - corrosion measures

Multi - layer coating protection: In addition to the basic primer and topcoat, add an intermediate coating. For example, first apply a layer of epoxy zinc - rich primer to provide cathodic protection, then apply a layer of epoxy micaceous iron intermediate coating to increase the thickness and shielding effect of the coating, and finally apply a high - performance polyurethane topcoat to improve the weather resistance and corrosion resistance of the coating. This multi - layer coating system can greatly improve the anti - corrosion effect of the steel plate and effectively extend its service life.

Regularly update the cathodic protection system: For ships using sacrificial anode protection, regularly check and replace the sacrificial anodes (such as zinc blocks, aluminum blocks, etc.). According to the ship's service environment and sailing time, generally, it is necessary to check the consumption of the sacrificial anode every 1 - 2 years. When the remaining weight of the sacrificial anode is less than 50% of the original weight, replace it in time to ensure that the steel plate is always in a good state of cathodic protection.

 

 

 

Strengthen regular inspection and maintenance

Establish a comprehensive inspection plan: Develop a detailed inspection schedule. According to factors such as the service life of the ship, the sailing area, and the type of loaded goods, determine the inspection frequency of the steel plates in different parts. For example, for the steel plates in the liquid cargo tank that often load corrosive goods, conduct a detailed inspection every 6 months; for the steel plates of the main structure of the hull, conduct a comprehensive inspection once a year.

Repair the damaged parts in a timely manner: Once corrosion, cracks, deformation and other problems are detected on the steel plate, repair them immediately. For slight corrosion, methods such as grinding and repainting can be used for treatment; for more serious corrosion or cracks, repair welding or replacing the steel plate in a timely manner. During the maintenance process, strictly follow the relevant welding process and quality standards to ensure the maintenance quality and restore the steel plate to its original strength and performance.

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