Tungsten

Tungsten is extraordinary because it has the highest melting point of any metal. Besides its high temperature capability, it is resistant to corrosion in weak acids and alkalis at lower temperatures, but it is somewhat susceptible to strong acids at lower temperatures. Moreover, tungsten is susceptible to corrosion by alkalis and strong acids at high temperatures, and the attack can be accelerated or possibly more severe in the presence of oxidizing agents. Tungsten is highly resistant to atmospheric corrosion and to corrosion in water. Oxidation is insignificant in air below 595°C or in oxygen at temperatures less than 510°C.