The glistening gold shops on the market everywhere sufficiently show the likability of a variety of people for gold products, but recent years, because of the problem of “rusty”, the quality of gold products was suspected by many people. They think the reason for affecting the quality of the gold products is the shorting purity of gold. But what is the real reason for the golden and brighten gold and gold-plated tungsten products were rusted? Is it the reason of gold purity that produces those rust?

 

It’s well known that the gold has weaken metal activity but high corrosion resistance, which makes its chemical properties steadily, and therefore it will not cause the problem of “rusty” when existed by the form of simple substance in nature. But the chemical affinity of gold and sulfide is strong, and therefore its stable chemical properties will be changed along with the adjunction of metals and the other problems produced in the production process when  manufacturing the gold into a wide variety of shapes, handicrafts and jewelries. These problems include: the improper cleaning of gold in the production process, dust or other impurities intake during production process, prolonged exposure to air and light and so on. As for the tungsten gold-plated products, the reasons for being rusted dues to the improper store of gold plating solution in the gold-plating process and the adjunction content of other metals in the gold plating solution. These problems will make the gold-plated tungsten products’ surface rust, thereby greatly reducing the aesthetic and ornamental of the products. Thus, the "Rusty" surface of gold and tungsten gold-plated production does not prove the view of shorting purity of gold. It reminds us that should pay more attention to maintain the gold and tungsten gold-plated products, for avoiding the generation of rust.