The purpose of studying corrosion is to control corrosion to prolong the service life of gold bends, among which electrochemical corrosion is the most important research object.
The corrosion of metals in electrolyte solution is called electrochemical corrosion. When the aurite material and the electrolyte solution are in contact with each other, a redox reaction with free electrons will occur on the solid/liquid phase interface, resulting in the aurite at the contact surface becoming a gold ion or a complex ion to dissolve or generate hydrogen. Stabilizing compounds such as compounds and oxides can destroy the properties of metallic materials. This process is called electrochemical corrosion.
Electrolyte solution, in short, is a conductive solution, which is the basic condition for the corrosion of gold. Almost all aqueous solutions, including rainwater, fresh water, sea water, acid, alkali, salt solutions, and condensation in the air can constitute electrolyte solutions.
Electrochemical corrosion is very common. In a humid atmosphere, most of the corrosion of various steel structures such as bridges, rails, municipal facilities, storage tanks, ships, and offshore platforms is due to electrochemical corrosion.