Some questions about brass rust and corrosion
Will brass rust?
Yes, brass will rust. Brass is an alloy of copper and zinc. There are many types of brass. If it is not protected and maintained, it will rust. Different types of brass will rust to different degrees. Among them, oxygen-free copper rusts slowly, most bronzes and ordinary industrial pure copper (industrial copper) brass rusts more easily, and H59 is the most susceptible to rust, which is determined by the characteristics of its composition.
Does brass perform well in applications involving water?
Generally speaking, brass is not the most suitable metal for applications that require immersion in water. It loses its zinc content in water, resulting in a decrease in the strength and durability of the metal. Therefore, the integrity of its use may be compromised.
Due to different compositions, some types of brass may be suitable for water applications. For example, naval brass contains about 40% zinc and about 1% tin to reduce dezincification. This makes it more resistant to salt water.
What is patina?
Patina is the color change that occurs in certain metals due to oxidation. This patina or coating builds up along the surface when the metal comes in contact with any deteriorating environmental factors, such as oxygen or water. The patina is usually different shades of blue and green.
Some people see a patina on brass and refer to it as rust. However, as mentioned above, brass cannot rust without iron. This discoloration is entirely due to oxidation. In fact, the patina appears to protect the metal from corrosion.
How to Prevent Brass Alloys from Corroding?
Applying a clear sealant to metals such as brass protects it from contact with natural elements that can cause corrosion. Oxidation occurs when the sealant wears off or becomes compromised over time. For example, once the metal comes in contact with air or water, it causes the process to begin.
After a few minutes, a patina will begin to form on the metal to protect it from corrosion.
If the sealant is compromised, you can follow the proper methods to remove the patina, clean, and reseal the metal.
