Green shipbuilding is placing higher demands on the domestic shipbuilding industry, and marine coatings play a crucial role in this transformation. Compared to Japan and South Korea, China's shipbuilding sector still faces significant challenges in resource consumption. The gap between China and global leaders remains evident, as highlighted by recent reports from the Shipbuilding Industry Management Office of the Commission of Science, Technology and Industry for National Defense.
The report identified four main factors contributing to inefficiencies in resource use. First, the development model remains largely extensive. Many Chinese shipyards rely on traditional expansion methods rather than efficient resource management, leading to low utilization rates. For instance, while Japanese shipyards consume about 350 kWh per $10,000 of value, Chinese yards use roughly three times that amount. Similarly, steel usage per ton of contracted ships in China is 0.39 tons—2.8 times that of Japan and 1.6 times that of South Korea. With steel accounting for over 20% of production costs, improving its utilization rate by just 1% could save 20,000 tons of steel and nearly 100 million yuan annually.
Second, the level of design and manufacturing technology lags behind global standards. China’s ship designs are generally heavier than those of Japan and South Korea, with an average increase of about 10%. Additionally, the precision of shipbuilding processes is lower, resulting in more rework and increased paint consumption—about 20% higher than international levels. This inefficiency also raises energy use and operational costs.
Third, outdated equipment continues to hinder efficiency. Many shipyards still use obsolete machinery, such as old boilers, transformers, and heat-treating furnaces, which consume excessive energy and waste resources. These technologies are not only inefficient but also environmentally harmful.
Fourth, there is a lack of effective systems for energy conservation and resource reduction. Management structures are often incomplete, and there is no dedicated team or clear evaluation metrics to ensure accountability. Moreover, innovation and the adoption of new energy-saving technologies have not been prioritized.
Experts emphasize that "green shipbuilding" is the future direction for the industry. They recommend establishing a comprehensive technical and economic indicator system that includes efficiency, energy saving, pollution reduction, and resource optimization. Key enterprises should lead by example, sharing their experiences and demonstrating the benefits of green practices. Incentive mechanisms should also be created to encourage companies to adopt energy-saving technologies and reduce waste.
By addressing these issues, China can significantly improve its competitiveness in the global shipbuilding market while promoting sustainable development.
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