Copper Nickel Alloys

Due to their naturally occurring resistance to seawater corrosion and intrinsic biofouling properties copper-nickel alloys have long been widely used in the components of seawater systems. From offshore oil and gas platforms to power and desalination plants and from commercial shipping to naval shipping, copper-nickel fittings have performed superbly in a host of marine applications.

Now, a comprehensive body of information and engineering data, compiled by a team of subject-matter experts on the use of copper-nickel alloys in seawater applications resides in Copper Nickel section. The content is provided by the Copper-nickel Task Group, a team of representatives from manufacturers of copper-nickel products as well as various specialists in the field metallurgy and marine corrosion.

Nickel Aluminum Bronze

Alloys of copper and aluminum are known as aluminum bronze and, together with other alloying additions, produce a range of properties that are beneficial to a diverse range of industries. Of these, the nickel aluminum bronze group of alloys is the most widely used. They have been adapted with time to optimise performance and can provide a combination of properties that offer an economic alternative to other types of alloy systems.

Nickel aluminum bronzes are available in both cast and wrought product forms and have a unique combination of properties including:

  • Excellent wear and galling resistance
  • High strength
  • High corrosion resistance.

Papers on Other Copper Alloys

Below are some papers of interest on the other copper alloys, such as nickel aluminum bronze:

  • Copper Alloys for Marine Environments (CDA UK Publication 206, Second Revision, 2013) [PDF]
  • Materials Selection for High Reliability Copper Alloy Seawater Systems
    Seawater systems are used by many industries such as shipping, offshore oil and gas production, power plants and coastal industrial plants. The main use of seawater is for cooling purposes but it is also used for fire-fighting, oil field water injection and for desalination plants. This paper examines the use of copper alloys to provide high reliability systems covering piping valves, pumps, water boxes and strainers.
  • Guidelines for the Use of Copper Alloys in Seawater
    Copper alloys are widely utilized in the design of seawater systems for their excellent resistance to corrosion and biofouling and many other excellent properties. This paper discusses general guidelines that should be considered when choosing copper alloys for service in a marine environment. Topics discussed include: protective film formation, effects of velocity, seawater cavitation, effects of sulfides, marine biofouling, stress corrosion cracking, galling and sizing resistance, and use in desalination environments.