Melchior (alloy) corrosion in air, freshwater and seawater. Increasing content of nickel iron or manganese improves corrosion and cavitation resistance, especially in sea water and atmospheric water vapor. The alloy of 30% Ni, 0.8% Fe, 1% Mn and 68.2% copper is used in maritime shipping, in particular for the manufacture of condenser tubes. Thanks to the nickel, melchior, unlike brass and bronze, has not a yellow but a silver color. Together with high corrosion resistance, this silvery color is preferred for the manufacture of household utensils. Melchior (alloy) In metallurgy, melchior is an alloy of copper, mainly with nickel (5–30%). Its name
Sundown Tin and Copper Mine Sundown Tin and Copper Mine Sundown Tin and Copper Mine is a heritage-listed mine at Little Sundown Creek, Stanthorpe, Southern Downs Region, Queensland, Australia. It was built from to 1920s. It was added to the Queensland Heritage Register on 28 July 2000. Tin was discovered at Sundown in 1893, and a reward claim was granted for 40 acres, but at that date there was no machinery on the ground. Mining had ceased in 1894 for want of equipment, and copper prices were at rock-bottom at that time. The copper and tin deposits were on opposite sides of Little Sundown Creek,