Platinum will not oxidize at any temperature, but it may be corroded by various halogens, cyanide, sulfur and caustic soda. Its ductility is the highest among all pure metals, better than that of gold, silver and copper, but lower than that of gold. Platinum metal has strong corrosion resistance, is very stable at high temperature, and its electrical properties are also very stable. So in daily life, platinum will not fade.

All these physical properties make platinum a widely used metal in industry. Platinum can also be used to make jewelry, because it can resist corrosion and keep luster.

Some platinum rings are not as bright as before when they are taken out for a long time, and they feel gray. That's because platinum has been left for a long time and accumulated a lot of dust. It doesn't look as shiny as before. Don't worry, just take the platinum jewelry to the jewelry store for cleaning. Maintenance of platinum jewelry also requires regular scrubbing of jewelry.

Extended data

Platinum is a precious metal trading commodity. The ISO currency code of platinum ingot is "XPT". Platinum coins, platinum bars and platinum ingots can be traded or collected. Because platinum is not easy to corrode and has a shiny appearance, it is also used as jewelry, usually 90% to 95% alloy. Publications on jewelry trading generally advise jewelers to scrape some scratches on the surface of platinum.

In the watchmaking industry, many companies will use platinum to make limited edition watches. Platinum will neither lose its luster nor be scratched (compared with gold), so it is very suitable for clocks and watches.

Like other industrial commodities, the price of platinum fluctuates more than that of gold. In 2008, the price of platinum dropped from $2,252 to $774 per troy ounce, and its market value shrank by nearly two-thirds. Compared with the same period, the price of gold dropped from about $0/000 per ounce to about $700, and the market value only dropped by one third.

In the sustained and steady growth economy, the price of platinum is often twice that of gold; In unstable times, due to the reduction of industrial demand, platinum prices generally fall below the gold price level. When the economy is depressed, the price of gold is more stable because its demand is not driven by industrial use. /kloc-in the 0/8th century, Louis XV of France announced that platinum was the only metal worthy of the king in view of its rarity.

Baidu Encyclopedia-Platinum?