Galvanic corrosion
Videos
Galvanic corrosion is an electrochemical process in which one metal corrodes when it is in electrical contact with another, different metal, and both are in the presence of an electrolyte. A similar g
Corrosion of an iron nail wrapped in bright copper wire, showing cathodic protection of copper; a ferroxyl indicator solution shows colored chemical indications of two types of ions diffusing through a moist agar medium.
Regular maintenance checks discovered that the Statue of Liberty suffered from galvanic corrosion.
Aluminium anodes mounted on a steel-jacketed structure
Electrical panel for a cathodic protection system
Galvanization
Videos
Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are coated by submerging them
Galvanic corrosion
…particles that could cause potential mechanical damage to circulating pumps, heat exchangers, etc. A common example of galvanic corrosion occurs in galvanized iron, a sheet of iron or steel covered with a zinc coating. Even when the protective zinc coating is broken, the underlying steel is not attacked. Instead…
Galvanized surface with visible spangle
Protective effect: completely rusted letter box mounted to a hot-dip galvanized wall
Galvanized nails
Rusted corrugated steel roof