Monel

Monel is a nickel-copper mixture catalyst used to reduce emissions of CO, HC, and NOx from vehicle exhaust. It is composed of 31.5% copper, 66.5% nickel, and 2% impurities, with unique properties such as high surface area, porosity, and good thermal stability. Monel, any of a group of nickel-copper alloys, first developed in 1905, containing about 66 percent nickel and 31.5 percent copper, with small amounts of iron, manganese, carbon, and silicon. Stronger than pure nickel, Monel alloys are resistant to corrosion by many agents, including rapidly flowing seawater.