What is the sign of PD? What are the signs of other precious metals?
Platinum (Pt) - acid ferric chloride at room temperature. But it can be slow, aqua corrosion, hydrochloric acid only adding oxidant to the corrosion of platinum, platinum in hydrobromic acid corrosion at room temperature under high temperature corrosion can platinum halogen, molten potassium (sodium) to platinum platinum dissolved in strong corrosion. Boiling aqua regia and sulfuric acid.Platinum (PD) attracts organic vapors. Carbon and carbide affect physical and mechanical properties, so contact with this material should be avoided in the manufacture and use of platinum palladium and its alloys
The United States provides purity to called Pt, must contain at least 50% platinum, platinum and platinum content. A total of 95% more than 95% purity can play Pt mark. The platinum content between 75%-95% jewelry, must also be on the platinum metal jewelry mark. Platinum content between 50%-75%, will the name must be contained in a platinum group metal and its content.
Palladium (Pd), one of the platinum group metals, is also one of the precious metals commonly used in jewelry making. It belongs to platinum group metals with platinum (Pt), and has a high reflectivity to visible light. Therefore, it appears white and has a similar appearance and color:Platinum --- tin white palladium --- steel white
