Nickel Aluminum Bronze Corrosion Resistance

This oxide film provides the following benefits.

Nickel aluminum bronze corrosion resistance.

This film is self repairing in media containing even low levels of oxygen. Nickel aluminum bronze nab is copper aluminum alloy with addition of nickel and iron elements. This oxide layer resists corrosion while at the same time prevents oxygen from reaching the underlying steel. Centrifugally cast nickel aluminum bronze high pressure flange for a sub sea weapons ejection system.

04 nickel aluminum bronze alloys are known for their superior corrosion resistance in seawater and many other chemical environments. While displaying a good combination of corrosion resistance and strength nab is still prone to different forms of corrosion such as stagnant sea water corrosion selective phase corrosion and cavitation erosion. Many aircraft are made from aluminum as are car and bike parts. Aluminium bronzes are most valued for their higher strength and corrosion resistance as compared to other bronze alloys.

This paper examines surface films localised corrosion sand erosion galvanic issues sulfides and ferrous sulfate treatments as well as biofouling boat hulls and offshore sheathing. Aluminum bronze aluminum bronzes are a family of copper based alloys containing aluminum as the principle alloying element. Nickel aluminum bronze nab is a metallic alloy that is widely used for ship valves and propellers among other marine applications. Nickel aluminum bronze alloys are known their superior corrosion resistance in seawater and many other chemical environments.

Corrosion rate 0 05 0 075 mm year impingement resistance up to 4 3 m sec nb. It is widely used as pipes valves and pump casings in marine environments due to the excellent. This is due to its light weight but also to its resistance to. This film is self repairing in media containing even low levels of oxygen.

Nickel levels equal or greater than those of iron are believed to increase corrosion resistance the high manganese aluminium bronze alloy cumn11al8fe3ni3 is used primarily as cast propellers in marine environments as it has a higher resistance to erosion corrosion 4. The corrosion resistant property relies on the formation of a copper aluminum oxide film. These alloys are tarnish resistant and show low rates of corrosion in atmospheric conditions low oxidation rates at high temperatures and low reactivity with sulfurous compounds and other exhaust products of combustion. Alloy c95800 was selected for this application for its combination of high yield strength 35 ksi 241 mpa minimum as cast excellent seawater corrosion resistance and galvanic compatibility with mating materials.

The corrosion resistant property relies on the formation of a copper aluminum oxide film.