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.
These carabiners have an anodized aluminium surface that has been dyed; they are made in many colors. Anodizing (spelled anodising, in Singapore, the UK, India, and Australia) is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called anodizing because the part to be treated forms the anode electrode of an electrical circuit.