A Brief Introduction to the Ancient Indus Civilization. The greater Indus region was home to the largest of the four ancient urban civilizations of Egypt, Mesopotamia, South Asia and China. It was not discovered until the 1920's. Most of its ruins, even its major cities, remain to be excavated. The ancient Indus Civilization script has not been deciphered.
Anodising to Prevent Galvanic Corrosion. Galvanic corrosion is a serious issue across the engineering industry and it has a variety of solutions, which all boil down to one technique: breaking the circuit.Anodising is one way to break the circuit.The anodic coating is made up of aluminium oxide, which is a good electrical insulator.The oxide layer is a thousand times thicker than the natural oxide that forms on aluminium, which offers essentially no galvanic protection.recautions When Using Anodising for Galvanic Corrosion Protection. Anodised aluminium has an electrically insulative surface, just like any of the other barrier protection techniques and if this surface is damaged then the protection it provides will be reduced or eliminated.
In order to stop corrosion, one must either break the corrosion circuit or reduce the driving potential. Interrupt the Corrosion Circuit.Strategies for breaking the corrosion circuit involve adding a non-conductor into the loop or removing the electrolyte.Nonconductivecoating: Applying a nonconductive paint or polymer coating to a metal will prevent the conductive electrolyte from touching the metal, thereby preventing the flow of current.educe the Driving Potential. Strategies for minimizing the electrode potential is to either add a battery into the corrosion circuit or to swing the potential in favor of purposely corroding a sacrificial metal.