Yes, brass does discolor over time, especially when exposed to oxygen, moisture, or sulfur in the air. Proper cleaning and polishing of the brass can help slow down the process of corrosion and tarnishing, preserving the metal for years to come. This is caused by a reaction between the chlorine in the atmosphere and the copper content in brass, resulting in a black or green coating. Depending on the environment, brass can also experience tarnishing. This can cause the brass to become pitted or discolored. In addition, the brass can be exposed to a process known as hydrolysis, which is the breakdown of brass components due to the reaction with moisture in the air. This process can make the brass brittle and fragile, and it may crack or chip easily. This is a result of oxygen and water reacting with the zinc content of the brass, removing it from the alloy. The most common form of corrosion for brass is called dezincification. When brass gets old, it can corrode and tarnish, losing its attractive yellow color. Cleaning and polishing the brass will slow down the process and preserve its shine. Over time, the tarnish can build up and create a more dark, blackish hue across the surface of the brass item.ĭepending on the environment and the level of care given to the brass item, this process can take several days to years to happen. This patina protects the underlying metal from further corrosion and oxidation. This causes the brass surface to oxidize, resulting in a dark tarnish or patina on the surface of the brass. As brass is exposed to oxygen and moisture, a chemical reaction takes place. This is due to the natural properties of the brass alloy and its reaction to air and moisture.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |