Uhrausmetallipinnoitus

Uhrausmetallipinnoitus, also known as sacrificial metal coating or galvanic protection, is a surface treatment method used to protect metals from corrosion. The technique involves applying a layer of metal that is more reactive than the base material, such as steel. This reactive metal, often zinc, aluminum, or magnesium, corrodes preferentially, thereby shielding the underlying metal from environmental factors like moisture, oxygen, and pollutants.

The process is commonly applied to steel structures, automotive parts, and construction materials to extend their lifespan. In the case of zinc coating, the method is widely recognized as galvanization. The protective layer forms a barrier against corrosion while also providing a sacrificial anode effect—when the coating is damaged, the zinc continues to corrode instead of the steel, preventing rust formation.

Uhrausmetallipinnoitus can be applied through various techniques, including hot-dip galvanizing, electroplating, or thermal spraying. Hot-dip galvanizing involves immersing the steel in molten zinc, creating a durable and uniform coating. Electroplating uses an electric current to deposit zinc onto the metal surface, offering precise control over thickness. Thermal spraying, meanwhile, applies zinc particles via high-velocity gas streams, suitable for large or irregularly shaped components.

The effectiveness of the coating depends on factors such as the type of metal used, coating thickness, and environmental exposure. While sacrificial coatings provide long-term protection, periodic inspections are recommended to ensure the integrity of the layer, especially in harsh conditions. This method is widely used in industries where corrosion resistance is critical, balancing cost-effectiveness with durability.