21. As with other metals, if copper is put in contact with another metal, galvanic corrosion will occur. 22. Mirrors use a small amount of copper to provide galvanic corrosion protection to the reflective silver layer. 23. Having dissimilar metals in contact can result in galvanic corrosion inside of the lamps'sockets, causing them to stop working. 24. When the silver reaches the aluminium, an electric short circuit forms, and galvanic corrosion then rapidly degrades the reflective layers. 25. Dielectric unions, with dielectric insulation, separate dissimilar metals ( such as copper and galvanized steel ) to prevent galvanic corrosion . 26. This is an example of cathodic protection, an electrochemical technique developed in 1824 by Humphry Davy to prevent galvanic corrosion . 27. By utilizing lower concentrations of sodium molybdate, conductivity is kept at a minimum and thus galvanic corrosion potentials are decreased. 28. The presence of an electrolyte and an electrical conducting path between the metals is essential for galvanic corrosion to occur. 29. The oxides on the surface of aluminium cause wetting issues and special solders must be used to prevent galvanic corrosion issues. 30. As a result, galvanic corrosion can occur in the presence of an electrolyte, and these connections can become unstable over time.
