The Importance of DZR: Protecting Against Dezincification Corrosion

DZR, or Dezincification Resistant, Brass is a vital material when it comes to manufacturing products that require protection against dezincification corrosion. DZR Brass, also known as DR brass, is a specific type of brass that is designed to resist dezincification, a corrosive process where zinc dissolves from the brass alloy, thereby compromising its mechanical properties. In this article, we will delve into the significance of DZR and its applications in various industries.

Dezincification represents a severe form of corrosion that can lead to system failures, such as leaks, blockages, or even ruptures, particularly in HVAC systems. To prevent such failures and ensure the long-lasting performance of systems, it is crucial to consider dezincification during the design and selection of components.

In Ireland, regulations mandate the use of dezincification resistant fittings for those going underground. While potable water is unlikely to cause dezincification, it is essential to employ DZR fittings when distribution systems may introduce fluids capable of triggering dezincification. If uncertainty persists regarding the need for specialised components, contacting Greentherm or seeking advice from the local water authority can provide clarity for your specific project.

Manufacturing, Properties, and Specifications

Manufacturing DZR Brass requires careful attention to maintain product quality and anti-corrosive properties. While materials like copper and bronze naturally exhibit dezincification resistance, brass stands out as the most practical choice due to its ability to be produced in high volumes. However, brass alone does not possess inherent resistance. To create DZR brass, controlled quantities of elements such as arsenic and antimony are added to hinder the selective dissolution of zinc when in contact with water. This manufacturing process not only renders the brass anti-corrosive but also enhances its strength.

DZR Brass comes in various types, each with specific specifications tailored to meet distinct requirements. Typically, DZR Brass should have a zinc conent lower than 15% to avoid dezincification. Nevertheless, the addition of inhibitors permits DZR Brass to have a higher zinc content. In Ireland, the specifications indicate that acceptable DZR Brass may contain arsenic (0.02-0.15%) and nickel (0-0.3%).

The Benefits of DZR Brass in Valves

One of the most common applications of DZR Brass is in the manufacturing of Ball Valves. Ball Valves serve as shut-off valves, effectively controlling the flow of liquids or gases, even in corrosive environments. These valves find applications across various industries, including oil and natural gas, manufacturing, chemical storage, and residential usage.

Utilising DZR brass for manfuacturing ball valves offers numerous advantages. Thanks to its anti-corrosive nature, DZR Brass ensures extended service life without the risk of leakage. VIR, for instance, provides a range of ball valves with “Butterfly” and “Lever” handles made from DZR Brass. These DZR ball valves exhibit a significantly reduced risk of failure or leakage. They are ideal for installations where aggressive water causes zinc leaching in standard brass alloys, ultimately weakening the material’s molecular structure.

By incorporating DZR Brass into product such as ball valves, the overall lifespan of a system can be significantly improved. The use of DZR Brass diminishes the risks associated with leakage, including contamination concerns. For installers and specifiers, it is crucial to identify products, especially Ball Valves, manufactured using DZR Brass. This ensures that both their customers and themselves can benefit from the enhanced durability and reliability.

In conclusion, the utilisation of Dezincification Resistant Brass (DZR) plays a pivotal role in various applications, particularly in environments where dezincification corrosion poses a threat to system integrity. By selecting products crafted from DZR Brass, such as Ball Valves, the risks of failure, leaks, and associated problems can be substantially mitigated. The anti-corrosive properties of DZR Brass contribute to the longevity and reliability of systems, ensuring seamless operation and peace of mind for manufacturers, installers, and end-users alike.