In the wind power industry, the humid, enclosed, and poorly ventilated environment inside the tower is indeed the most vulnerable place for metal. Especially in wind farms near the coast, the salt spray content in the air is higher, and the humidity is close to 80%-95%. Rust spots can easily appear on the inner walls of the tower, flanges, bolt seats, and other areas if not properly maintained. Can VCI Anti Rust White Powder be used for rust prevention of the inner walls of wind turbine towers? How effective is it? Is it safe? CVCI will discuss this topic from the perspective of a professional rust prevention product manufacturer.

Why are the inner walls of towers particularly prone to rust?

Wind turbine towers are enclosed spaces with poor air circulation. Any temperature change outside easily leads to condensation inside. Especially during periods of large temperature difference between day and night, the inner walls often become damp, and water droplets run down the walls, like indoor rain. Frequent maintenance inside the tower, with doors opening and closing, causes repeated air exchange, resulting in fluctuating humidity. These fluctuations increase the likelihood of corrosion spots forming on the steel surface. If the construction site is near the coast, the higher chloride ion content in the air further accelerates the corrosion of the steel. Many wind turbine manufacturers apply primer or thick-film anti-corrosion paint in advance, but rust can still occur if the internal welds are uneven or maintenance is not timely. Therefore, why do tower inner walls require additional rust-preventive products? Because this is a real environmental problem that cannot be completely avoided.

What exactly is the principle of vapor phase corrosion protection? Can it be used in a space like a wind turbine tower?

Many people find vapor phase corrosion protection magical, as if putting VCI Anti Rust White Powder inside will prevent metal from rusting. Actually, the principle of VCI Anti Rust White Powder is not complicated—VCI molecules volatilize in the air and adsorb onto the metal surface in gaseous form, forming a transparent, extremely thin protective layer that blocks corrosion from air, moisture, and salt.

For large spaces like wind turbine towers, which are tens of meters high, many people worry: Can the VCI Anti Rust White Powder gas diffuse through? Is the sealing sufficient? Is the VCI Anti Rust White Powder concentration adequate?

Here's a simple logic for judging: the tower is a semi-enclosed space, not completely sealed, but the sealing is sufficient, allowing VCI molecules to continuously diffuse inside the tower. Vapor phase corrosion inhibitors only require sufficient volumetric dosage, such as the exact number of grams or particles used per cubic meter, which is highly controllable. Wind turbine towers do not contain a large amount of equipment and do not generate substances that strongly chemically react with VCI, thus ensuring high compatibility. In other words, vapor phase corrosion inhibitors can be used on the inner walls of towers, and this technology has been successfully applied in actual projects, especially in coastal wind farms in Asia and Southeast Asia.

What are the benefits of VCI Anti Rust White Powder? Why do many wind power companies favor it?

Compared to traditional oil-based and brush-based rust prevention methods, VCI Anti Rust White Powder's characteristics perfectly meet the actual needs of wind turbine towers.

No spraying or wiping is required; simply hang, place, and secure it.

Towers are so large that manual oiling is impractical; it would be exhausting, leave a strong oily smell, and be difficult to clean.

It has a wide coverage area and strong penetration into hard-to-reach areas.

The back of ladders, flange grooves, and bolt areas are all difficult areas to clean, but VCI Anti Rust White Powder's VCI molecules diffuse and automatically penetrate.

It does not alter the metal surface condition, and subsequent processes are unaffected.

The interior of the tower will later be used to install cables, ladders, safety doors, and other accessories. VCI Anti Rust White Powder is non-stick, non-adhesive, and leaves no residue, making maintenance convenient.

It has a longer rust prevention period, lasting 12-24 months.

For wind power projects, the longer the cycle from tower manufacturing, transportation, storage in the yard to installation, the more necessary the long-term protection provided by VCI Anti Rust White Powder becomes.

Our VCI Powder rust-preventing products have been exported to numerous Southeast Asian countries, accumulating extensive practical experience.

Southeast Asia is characterized by high humidity and salty air, demanding even higher standards for rust prevention. Customers in the wind power supply chain of Malaysia, Vietnam, the Philippines, and Thailand have reported consistent and stable performance from our VCI Powder rust-preventing products, finding it simpler and cleaner than a combination of oiling and desiccants.

CVCI's experience exporting to Southeast Asia: 

VCI Powder is especially needed in humid regions. Our rust-preventing product exports to Southeast Asia are substantial, particularly to the wind turbine tower supply chain in Vietnam, Malaysia, and Indonesia.

The reason is simple: Southeast Asia experiences year-round humidity of 70-90%, coupled with long coastlines and high levels of salt spray corrosion. Wind turbine towers are typically stored outdoors in storage yards, and the installation cycle for these products is long, often leading to delays.

Local customers generally report that using CVCI's VCI Powder rust-preventing products can easily extend the storage time of towers by more than six months, and the inner walls are noticeably cleaner, with a significant reduction in rust.

If you are facing rust problems with your wind power products, please contact us at cvci-gaoxiu@chinavci.com for expert technical support on rust prevention.