Three Gorges Dam

Project overview

The Three Gorges Project comprises the dam, power station, double-line five-step ship lock and ship lift, the world's largest water conservancy hub. The corrosion protection of metal structures such as lock miter gates, penstocks and trash racks is a key element of the project's durability. The project is included in the power industry section of the PPG industrial protection brochure.

Anti-corrosion (fire protection) challenge

• Long-term immersion in fresh water and dry/wet alternation in the water-level fluctuation zone demand water and penetration resistance;
• The sediment-laden Yangtze flow causes abrasion of the lock and penstocks, a harsh wear condition;
• Water discharge and maintenance periods are limited, so coating maintainability and fast curing are important.

Coating system

*The table lists the coating systems or system directions recorded in the manufacturer's documentation; specific models and film thicknesses are subject to the project technical documents.

Source

PPG Industrial Protective and Marine Coatings Introduction (power industry section, page 12); public literature on the corrosion protection of the Three Gorges Project metal structures.