What are the causes of silverware corrosion

In ancient times, gold and silverware were considered to have the effects of prolonging one's life, prolonging life, and being immortal, and they were loved by people; today, silverware has become a symbol of purity because of its white and bright color, and it is also favored by people. What are the causes of silverware corrosion? In ancient times, gold and silverware were considered to have the effects of prolonging one's life, prolonging life, and being immortal, and they were loved by people; today, silverware has become a symbol of purity because of its white and bright color, and it is also favored by people. What are the causes of silverware corrosion? Influence of humidity. Although silver is considered an inactive precious metal, it easily absorbs water molecules in the atmosphere and forms a water film on the surface. Sulfur, oxygen, and chlorine in the air enter the water film to produce insoluble silver sulfide, silver oxide, and chlorine. Silver is corroded on the surface of the silver layer and causes discoloration. In addition, the rougher the surface of silver, the easier it is to condense moisture and enter corrosive media, causing discoloration. The influence of ultraviolet light The ultraviolet light contained in the sun and artificial light sources (such as fluorescent lamps and mercury lamps) has an aging effect on various cultural relics of different textures, and silverware is no exception. Ultraviolet light has a wavelength of 100 nanometers to 400 nanometers (the shorter the wavelength, the higher the energy), and it is divided into: near ultraviolet uva, far ultraviolet uvb and ultra-short ultraviolet uvc. When ultraviolet light irradiates the surface of silverware, silver atoms capture high-energy photons, transition from a stable low-energy state to an unstable high-energy state, which manifests as the ionization of silver, which ultimately accelerates the corrosion and discoloration of silver. The influence of air pollution on silver standard potential standard ag+/agu003d0.799 v. Due to the development of industrialization and the billowing smoke released from the burning of wheat straw in rural areas, the sulfur-containing gas in the air will continue to increase. In this environment, silverware is prone to produce a black or yellow film on the surface, and the oxidized silver is exposed. In the presence of sulfur-containing air, the film will also turn into sulfide and change color. What are the causes of silverware corrosion? The corrosion of an artifact is not caused by a single factor, but the result of the mutual influence of various complex factors in the environment it was in at that time. Previous: What should be paid attention to when choosing precious metal jewelry Next: What should be paid attention to in the maintenance of silverware