Naval Brass / Aluminium Brass

In summary, naval brass and aluminum brass are commonly used for marine applications, such as desalination heat exchangers. The corrosion resistance of these brasses depends on their composition, and some may still be susceptible to corrosion. Naval brass contains 1% tin to inhibit dezincification, while aluminum brass has improved corrosion resistance due to the addition of aluminum. The use of these brasses at high temperatures, such as 100 C, may vary depending on the specific alloy and environment.
  • #1
rollingstein
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I have come across some equipment constructed out of Naval Brass / Aluminium Brass. Apparently these are common materials for marine applications. e.g. desalination heat exchangers etc.

Does anyone know how high a temp. these brasses can be used at? e.g. is 100 C OK? Also the crevice corrosion / pitting problems that are specific to Stainless Steels; brass does not have these problems, correct?
 
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  • #2
rollingstein said:
brass does not have these problems, correct?
Depends on the brass. Hit Wiki for "naval brass" to get a quick overview of what alloying constituents help or hurt corrosion resistances of various brasses to various environments.
 
  • #3
Brasses can have corrosion, including crevice and pitting corrosion, depending on the environment.

Admiralty brass (69 Cu, 30 Zn, 1 Sn) contains 1% tin to inhibit dezincification in many environments.
Naval brass (59 Cu, 40 Zn, 1 Sn)
Aluminum brass (77.5 Cu, 20.5 Zn, 2 Al) Aluminum improves corrosion resistance. It is used for heat exchanger and condenser tubes.[29]

Z. Xia and Z. Szklarska-Smialowska (1990) Pitting of Admiralty Brass. Corrosion: January 1990, Vol. 46, No. 1, pp. 85-88.

See also - Copper Alloys for Marine Environments - http://www.copper.org/applications/marine/cuni/pdf/pub206.pdf
 
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Related to Naval Brass / Aluminium Brass

1. What is Naval Brass / Aluminium Brass?

Naval Brass and Aluminium Brass are two types of brass alloys commonly used in marine applications. Naval Brass is a type of brass with high strength and corrosion resistance, made up of copper, zinc, and tin. Aluminium Brass is also a corrosion-resistant alloy, but it contains a higher percentage of aluminium, making it ideal for use in saltwater environments.

2. What are the properties of Naval Brass / Aluminium Brass?

Some of the properties of Naval Brass include high strength, good corrosion resistance, and excellent machinability. Aluminium Brass is also strong and corrosion-resistant, but it has the added benefit of being lightweight, making it suitable for use in marine structures and equipment.

3. What are the common uses of Naval Brass / Aluminium Brass?

Naval Brass is commonly used in marine equipment and components, such as propellers, fittings, valves, and pumps. Aluminium Brass is used in condensers, heat exchangers, and other components in marine engines and seawater piping systems.

4. How are Naval Brass / Aluminium Brass different from other brass alloys?

Naval Brass and Aluminium Brass have a higher corrosion resistance compared to other brass alloys, making them suitable for use in marine environments. They also have different compositions, with Naval Brass containing more zinc and tin, and Aluminium Brass containing more aluminium.

5. How do you maintain Naval Brass / Aluminium Brass?

To maintain Naval Brass and Aluminium Brass, it is important to regularly clean and polish them to prevent tarnishing and corrosion. It is also recommended to use compatible materials and avoid exposure to harsh chemicals and abrasive materials, which can damage the alloys.

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