Operational characteristics and properties of aluminum without processing
As noted earlier, a properly developed and then made and high -quality mounted aluminum roof does not require anti -corrosion, since the resistance to corrosion in roofing aluminum is approximately 20 times more than in a similar steel parameter. Pure aluminum has the greatest resistance to corrosion, after it there are its alloys with manganese, magnesium and other alloys that do not contain copper. In the last place in this list is fools in which the content of copper up to 6 percent. Enhanced corrosion in duralyumins is explained by the reason that during thermal treatment of a solid solution, aluminum and copper compounds are distinguished, which form galvanic micropars, which are the cause of spot corrosion, together with the main metal. The uncovered aluminum will not only corrode in urban conditions, but also in the coastal territories.
The material that is a protective layer has a lower electrochemical potential in comparison with the base metal, so that when influences that initiate corrosion processes, the function of the anode of tread protection is performed.