Cupro Nickel - Copper-nickel Alloy With Enhanced Corrosion Resistance | Ideal For Marine Hardware, Heat Exchangers, And Seawater Applications

Cupro Nickel

Cupronickel or copper-nickel or "cupernickel" is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Cupronickel is highly resistant to corrosion inseawater, because its electrode potential is adjusted to be neutral with regard to seawater. Because of this, it is used for piping, heat exchangers and condensers in seawater systems, as well as marine hardware, and sometimes for the propellers, crankshafts and hulls of premium tugboats, fishing boats and other working boats.

Thermocouples and resistors whose resistance is stable across changes in temperature contain the 55% copper-45% nickel alloy (constantan).

Monel metal is a nickel-copper alloy, containing a minimum of 63% nickel.

7030 copper-nickel grade was developed for naval condensers. Soon afterwards, a 2% manganese and 2% iron alloy was introduced for a UK power station which needed better erosion resistance because the levels of entrained sand in the seawater. A 9010 alloy first became available in the 1950s, initially for seawater piping, and is now the more widely used alloy.